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Entry version 171 (22 Apr 2020)
Sequence version 1 (01 Nov 1996)
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Protein

Muscle, skeletal receptor tyrosine-protein kinase

Gene

Musk

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Receptor tyrosine kinase which plays a central role in the formation and the maintenance of the neuromuscular junction (NMJ), the synapse between the motor neuron and the skeletal muscle. Recruitment of AGRIN by LRP4 to the MUSK signaling complex induces phosphorylation and activation of MUSK, the kinase of the complex. The activation of MUSK in myotubes regulates the formation of NMJs through the regulation of different processes including the specific expression of genes in subsynaptic nuclei, the reorganization of the actin cytoskeleton and the clustering of the acetylcholine receptors (AChR) in the postsynaptic membrane. May regulate AChR phosphorylation and clustering through activation of ABL1 and Src family kinases which in turn regulate MUSK. DVL1 and PAK1 that form a ternary complex with MUSK are also important for MUSK-dependent regulation of AChR clustering. May positively regulate Rho family GTPases through FNTA. Mediates the phosphorylation of FNTA which promotes prenylation, recruitment to membranes and activation of RAC1 a regulator of the actin cytoskeleton and of gene expression. Other effectors of the MUSK signaling include DNAJA3 which functions downstream of MUSK. May also play a role within the central nervous system by mediating cholinergic responses, synaptic plasticity and memory formation.5 Publications

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the 'Function' section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

Mg2+By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Positively regulated by CK2.1 Publication

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei608ATPPROSITE-ProRule annotation1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei724Proton acceptorPROSITE-ProRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi580 – 588ATPPROSITE-ProRule annotation9

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionDevelopmental protein, Kinase, Muscle protein, Receptor, Transferase, Tyrosine-protein kinase
Biological processDifferentiation
LigandATP-binding, Magnesium, Metal-binding, Nucleotide-binding

Enzyme and pathway databases

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
2.7.10.1 3474

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Muscle, skeletal receptor tyrosine-protein kinase (EC:2.7.10.1)
Alternative name(s):
Muscle-specific tyrosine-protein kinase receptor
Short name:
MuSK
Short name:
Muscle-specific kinase receptor
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:Musk
Synonyms:Nsk2
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiMus musculus (Mouse)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri10090 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000589 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 4

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:103581 Musk

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini22 – 494ExtracellularSequence analysisAdd BLAST473
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei495 – 515HelicalSequence analysisAdd BLAST21
Topological domaini516 – 868CytoplasmicSequence analysisAdd BLAST353

Keywords - Cellular componenti

Cell junction, Cell membrane, Membrane, Postsynaptic cell membrane, Synapse

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Mice die perinatally being unable to take a breath and to respond to tail or leg pinch. Despite the presence of apparently normal skeletal muscle, the absence of differentiated nerve terminals is sufficient to account for this phenotype. Every aspect of NMJ formation examined is absent in these mice. Branches of the main intramuscular nerve do not establish normal contacts with the muscle, do not form correctly positioned or specialized nerve terminals, and are apparently not given appropriate signals to stop their wandering aimlessly across the muscle. Furthermore, postsynaptic differentiation is absent, muscle-derived proteins normally localized to the synaptic basal lamina or the postsynaptic membrane being uniformly distributed in myofibers.1 Publication

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology%5Fand%5Fbiotech%5Fsection">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi553Y → F: Loss of interaction with DOK7. 1 Publication1

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 21Sequence analysisAdd BLAST21
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000002444722 – 868Muscle, skeletal receptor tyrosine-protein kinaseAdd BLAST847

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi49 ↔ 99By similarity
Disulfide bondi98 ↔ 112By similarity
Disulfide bondi142 ↔ 190By similarity
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi222N-linked (GlcNAc...) asparagineSequence analysis1
Disulfide bondi233 ↔ 282By similarity
Disulfide bondi317 ↔ 382By similarity
Disulfide bondi325 ↔ 375By similarity
Glycosylationi338N-linked (GlcNAc...) asparagineBy similarity1
Disulfide bondi366 ↔ 406By similarity
Disulfide bondi394 ↔ 447By similarity
Disulfide bondi398 ↔ 434By similarity
Glycosylationi459N-linked (GlcNAc...) asparagineSequence analysis1
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei553Phosphotyrosine; by autocatalysis2 Publications1
Modified residuei680Phosphoserine; by CK21 Publication1
Modified residuei697Phosphoserine; by CK21 Publication1
Modified residuei754Phosphotyrosine; by autocatalysisBy similarity1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Ubiquitinated by PDZRN3. Ubiquitination promotes endocytosis and lysosomal degradation.1 Publication
Phosphorylated (PubMed:16818610). Phosphorylation is induced by AGRIN (PubMed:8653787, PubMed:18848351). Autophosphorylated. Autophosphorylation at Tyr-553 is required for interaction with DOK7 which in turn stimulates the phosphorylation and the activation of MUSK (PubMed:16794080, PubMed:20603078).5 Publications
Neddylated.By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q61006

PRoteomics IDEntifications database

More...
PRIDEi
Q61006

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
Q61006

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...
PhosphoSitePlusi
Q61006

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Expressed preferentially in skeletal muscle.1 Publication

<p>This subsection of the 'Expression' section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified 'at the protein level'.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Skeletal myogenesis is a major site of expression during normal embryogenesis. In addition, the ganglia of the developing peripheral nervous system and various embryonic epithelia, including those of kidney, lung and gut are also sites of expression.1 Publication

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSMUSG00000057280 Expressed in skeletal muscle organ and 80 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
Q61006 baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q61006 MM

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer. Homodimer (Probable).

Interacts with LRP4; the heterodimer forms an AGRIN receptor complex that binds AGRIN resulting in activation of MUSK.

Forms a heterotetramer composed of 2 DOK7 and 2 MUSK molecules which facilitates MUSK trans-autophosphorylation on tyrosine residue and activation.

Interacts (via cytoplasmic part) with DOK7 (via IRS-type PTB domain); requires MUSK phosphorylation.

Interacts with DVL1 (via DEP domain); the interaction is direct and mediates the formation of a DVL1, MUSK and PAK1 ternary complex involved in AChR clustering.

Interacts with PDZRN3; this interaction is enhanced by agrin.

Interacts with FNTA; the interaction is direct and mediates AGRIN-induced phosphorylation and activation of FNTA.

Interacts with CSNK2B; mediates regulation by CK2.

Interacts (via the cytoplasmic domain) with DNAJA3.

Interacts with NSF; may regulate MUSK endocytosis and activity.

Interacts with CAV3; may regulate MUSK signaling.

Interacts with RNF31.

Curated11 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection%27">Interaction</a> section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Show more details

GO - Molecular functioni

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

More...
BioGridi
201860, 5 interactors

The Eukaryotic Linear Motif resource for Functional Sites in Proteins

More...
ELMi
Q61006

Protein interaction database and analysis system

More...
IntActi
Q61006, 4 interactors

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000081625

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...
RNActi
Q61006 protein

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

1868
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

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SMRi
Q61006

Database of comparative protein structure models

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ModBasei
Search...

Protein Data Bank in Europe - Knowledge Base

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PDBe-KBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...
EvolutionaryTracei
Q61006

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini28 – 116Ig-like 1Add BLAST89
Domaini121 – 205Ig-like 2Add BLAST85
Domaini212 – 302Ig-like 3Add BLAST91
Domaini312 – 450FZPROSITE-ProRule annotationAdd BLAST139
Domaini574 – 855Protein kinasePROSITE-ProRule annotationAdd BLAST282

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the protein kinase superfamily. Tyr protein kinase family.PROSITE-ProRule annotation

Keywords - Domaini

Immunoglobulin domain, Repeat, Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG410IMMJ Eukaryota
COG0515 LUCA

Ensembl GeneTree

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GeneTreei
ENSGT00940000158226

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

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HOGENOMi
CLU_000288_30_5_1

InParanoid: Eukaryotic Ortholog Groups

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InParanoidi
Q61006

KEGG Orthology (KO)

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KOi
K05129

Identification of Orthologs from Complete Genome Data

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OMAi
CAPYNGK

TreeFam database of animal gene trees

More...
TreeFami
TF106465

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

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Gene3Di
1.10.2000.10, 1 hit
2.60.40.10, 3 hits

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR020067 Frizzled_dom
IPR036790 Frizzled_dom_sf
IPR007110 Ig-like_dom
IPR036179 Ig-like_dom_sf
IPR013783 Ig-like_fold
IPR013098 Ig_I-set
IPR003599 Ig_sub
IPR003598 Ig_sub2
IPR011009 Kinase-like_dom_sf
IPR000719 Prot_kinase_dom
IPR017441 Protein_kinase_ATP_BS
IPR001245 Ser-Thr/Tyr_kinase_cat_dom
IPR008266 Tyr_kinase_AS
IPR020635 Tyr_kinase_cat_dom

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01392 Fz, 1 hit
PF07679 I-set, 2 hits
PF07714 Pkinase_Tyr, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00109 TYRKINASE

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00409 IG, 3 hits
SM00408 IGc2, 3 hits
SM00219 TyrKc, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF48726 SSF48726, 3 hits
SSF56112 SSF56112, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50038 FZ, 1 hit
PS50835 IG_LIKE, 3 hits
PS00107 PROTEIN_KINASE_ATP, 1 hit
PS50011 PROTEIN_KINASE_DOM, 1 hit
PS00109 PROTEIN_KINASE_TYR, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequences (4+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 4 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform. This section is only present in reviewed entries, i.e. in UniProtKB/Swiss-Prot.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket

This entry has 4 described isoforms and 5 potential isoforms that are computationally mapped.Show allAlign All

Isoform 1 (identifier: Q61006-1) [UniParc]FASTAAdd to basket
Also known as: MLK2

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MRELVNIPLL QMLTLVAFSG TEKLPKAPVI TTPLETVDAL VEEVATFMCA
60 70 80 90 100
VESYPQPEIS WTRNKILIKL FDTRYSIREN GQLLTILSVE DSDDGIYCCI
110 120 130 140 150
ANNGVGGAVE SCGALQVKMK PKITRPPINV KIIEGLKAVL PCTTMGNPKP
160 170 180 190 200
SVSWIKGDNA LRENSRIAVL ESGSLRIHNV QKEDAGQYRC VAKNSLGTAY
210 220 230 240 250
SKLVKLEVEV FARILRAPES HNVTFGSFVT LRCTAIGIPV PTISWIENGN
260 270 280 290 300
AVSSGSIQES VKDRVIDSRL QLFITKPGLY TCIATNKHGE KFSTAKAAAT
310 320 330 340 350
VSIAEWSKSQ KDSQGYCAQY RGEVCDAVLA KDALVFFNTS YRDPEDAQEL
360 370 380 390 400
LIHTAWNELK AVSPLCRPAA EALLCNHLFQ ECSPGVVPTP MPICREYCLA
410 420 430 440 450
VKELFCAKEW QAMEGKAHRG LYRSGMHLLP VPECSKLPSM HRDPTACTRL
460 470 480 490 500
PYLDYKKENI TTFPSITSSR PSADIPNLPA STSSFAVSPA YSMTVIISIV
510 520 530 540 550
SSFALFALLT IATLYCCRRR KEWKNKKRES TAVTLTTLPS ELLLDRLHPN
560 570 580 590 600
PMYQRMPLLL NPKLLSLEYP RNNIEYVRDI GEGAFGRVFQ ARAPGLLPYE
610 620 630 640 650
PFTMVAVKML KEEASADMQA DFQREAALMA EFDNPNIVKL LGVCAVGKPM
660 670 680 690 700
CLLFEYMAYG DLNEFLRSMS PHTVCSLSHS DLSTRARVSS PGPPPLSCAE
710 720 730 740 750
QLCIARQVAA GMAYLSERKF VHRDLATRNC LVGETMVVKI ADFGLSRNIY
760 770 780 790 800
SADYYKADGN DAIPIRWMPP ESIFYNRYTT ESDVWAYGVV LWEIFSYGLQ
810 820 830 840 850
PYYGMAHEEV IYYVRDGNIL ACPENCPLEL YNLMRLCWSK LPADRPSFCS
860
IHRILQRMCE RAEGTVGV
Length:868
Mass (Da):96,693
Last modified:November 1, 1996 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iAFE4E644C6869933
GO
Isoform 2 (identifier: Q61006-2) [UniParc]FASTAAdd to basket
Also known as: MLK1

The sequence of this isoform differs from the canonical sequence as follows:
     454-462: DYKKENITT → A

Show »
Length:860
Mass (Da):95,671
Checksum:iA837F8299BD7494C
GO
Isoform 3 (identifier: Q61006-3) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     324-338: VCDAVLAKDALVFFN → GVLMQGPGEKMLLVFLPT

Show »
Length:871
Mass (Da):96,998
Checksum:iAA8D8D17E2F04722
GO
Isoform 4 (identifier: Q61006-4) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     866-868: VGV → TDGRAHFFWPHQY

Show »
Length:878
Mass (Da):98,081
Checksum:iA08686F5F939B8BC
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 5 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
E9PVV8E9PVV8_MOUSE
Muscle, skeletal receptor tyrosine-...
Musk
893Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
Q497X0Q497X0_MOUSE
Muscle, skeletal receptor tyrosine-...
Musk
870Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
F6WVU1F6WVU1_MOUSE
Muscle, skeletal receptor tyrosine-...
Musk
870Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3QPS3J3QPS3_MOUSE
Muscle, skeletal receptor tyrosine-...
Musk
878Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
K3W4P7K3W4P7_MOUSE
Muscle, skeletal receptor tyrosine-...
Musk
868Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti31T → A in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti31T → A in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti169V → A in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti169V → A in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti211 – 212FA → LG in CAA60165 (PubMed:7624144).Curated2
Sequence conflicti211 – 212FA → LG in CAA60166 (PubMed:7624144).Curated2
Sequence conflicti235A → E in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti235A → E in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti341Y → H in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti341Y → H in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti376N → Y in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti376N → Y in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti380Q → L in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti380Q → L in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti435S → R in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti435S → R in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti503F → L in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti503F → L in CAA60166 (PubMed:7624144).Curated1
Sequence conflicti512A → V in CAA60165 (PubMed:7624144).Curated1
Sequence conflicti512A → V in CAA60166 (PubMed:7624144).Curated1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_010785324 – 338VCDAV…LVFFN → GVLMQGPGEKMLLVFLPT in isoform 3. 1 PublicationAdd BLAST15
Alternative sequenceiVSP_010784454 – 462DYKKENITT → A in isoform 2. 1 Publication9
Alternative sequenceiVSP_010786866 – 868VGV → TDGRAHFFWPHQY in isoform 4. 1 Publication3

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
U37708 mRNA Translation: AAA79203.1
U37709 mRNA Translation: AAA79204.1
X86444 mRNA Translation: CAA60165.1
X86445 Genomic DNA Translation: CAA60166.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS18210.1 [Q61006-2]
CCDS18211.1 [Q61006-1]

Protein sequence database of the Protein Information Resource

More...
PIRi
I48696
I48697

NCBI Reference Sequences

More...
RefSeqi
NP_001032205.1, NM_001037128.1
NP_001032206.1, NM_001037129.1
NP_001032207.1, NM_001037130.1 [Q61006-2]
NP_035074.2, NM_010944.2 [Q61006-1]

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000084578; ENSMUSP00000081625; ENSMUSG00000057280 [Q61006-1]
ENSMUST00000102893; ENSMUSP00000099957; ENSMUSG00000057280 [Q61006-2]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
18198

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mmu:18198

UCSC genome browser

More...
UCSCi
uc033icg.1 mouse [Q61006-1]

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U37708 mRNA Translation: AAA79203.1
U37709 mRNA Translation: AAA79204.1
X86444 mRNA Translation: CAA60165.1
X86445 Genomic DNA Translation: CAA60166.1
CCDSiCCDS18210.1 [Q61006-2]
CCDS18211.1 [Q61006-1]
PIRiI48696
I48697
RefSeqiNP_001032205.1, NM_001037128.1
NP_001032206.1, NM_001037129.1
NP_001032207.1, NM_001037130.1 [Q61006-2]
NP_035074.2, NM_010944.2 [Q61006-1]

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
3ML4X-ray2.60E/F/G/H544-556[»]
SMRiQ61006
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGridi201860, 5 interactors
ELMiQ61006
IntActiQ61006, 4 interactors
STRINGi10090.ENSMUSP00000081625

PTM databases

iPTMnetiQ61006
PhosphoSitePlusiQ61006

Proteomic databases

PaxDbiQ61006
PRIDEiQ61006

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...
Antibodypediai
29502 459 antibodies

Genome annotation databases

EnsembliENSMUST00000084578; ENSMUSP00000081625; ENSMUSG00000057280 [Q61006-1]
ENSMUST00000102893; ENSMUSP00000099957; ENSMUSG00000057280 [Q61006-2]
GeneIDi18198
KEGGimmu:18198
UCSCiuc033icg.1 mouse [Q61006-1]

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
4593
MGIiMGI:103581 Musk

Phylogenomic databases

eggNOGiENOG410IMMJ Eukaryota
COG0515 LUCA
GeneTreeiENSGT00940000158226
HOGENOMiCLU_000288_30_5_1
InParanoidiQ61006
KOiK05129
OMAiCAPYNGK
TreeFamiTF106465

Enzyme and pathway databases

BRENDAi2.7.10.1 3474

Miscellaneous databases

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...
ChiTaRSi
Musk mouse
EvolutionaryTraceiQ61006

Protein Ontology

More...
PROi
PR:Q61006
RNActiQ61006 protein

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000057280 Expressed in skeletal muscle organ and 80 other tissues
ExpressionAtlasiQ61006 baseline and differential
GenevisibleiQ61006 MM

Family and domain databases

Gene3Di1.10.2000.10, 1 hit
2.60.40.10, 3 hits
InterProiView protein in InterPro
IPR020067 Frizzled_dom
IPR036790 Frizzled_dom_sf
IPR007110 Ig-like_dom
IPR036179 Ig-like_dom_sf
IPR013783 Ig-like_fold
IPR013098 Ig_I-set
IPR003599 Ig_sub
IPR003598 Ig_sub2
IPR011009 Kinase-like_dom_sf
IPR000719 Prot_kinase_dom
IPR017441 Protein_kinase_ATP_BS
IPR001245 Ser-Thr/Tyr_kinase_cat_dom
IPR008266 Tyr_kinase_AS
IPR020635 Tyr_kinase_cat_dom
PfamiView protein in Pfam
PF01392 Fz, 1 hit
PF07679 I-set, 2 hits
PF07714 Pkinase_Tyr, 1 hit
PRINTSiPR00109 TYRKINASE
SMARTiView protein in SMART
SM00409 IG, 3 hits
SM00408 IGc2, 3 hits
SM00219 TyrKc, 1 hit
SUPFAMiSSF48726 SSF48726, 3 hits
SSF56112 SSF56112, 1 hit
PROSITEiView protein in PROSITE
PS50038 FZ, 1 hit
PS50835 IG_LIKE, 3 hits
PS00107 PROTEIN_KINASE_ATP, 1 hit
PS50011 PROTEIN_KINASE_DOM, 1 hit
PS00109 PROTEIN_KINASE_TYR, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiMUSK_MOUSE
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q61006
Secondary accession number(s): Q61005, Q61987, Q61988
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 19, 2004
Last sequence update: November 1, 1996
Last modified: April 22, 2020
This is version 171 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. Human and mouse protein kinases
    Human and mouse protein kinases: classification and index
  2. SIMILARITY comments
    Index of protein domains and families
  3. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
  4. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
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