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UniProtKB - P11230 (ACHB_HUMAN)

Entry version 221 (10 Feb 2021)
Sequence version 3 (11 Jul 2002)
Previous versions | rss
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Protein

Acetylcholine receptor subunit beta

Gene

CHRNB1

Organism
Homo sapiens (Human)
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

After binding acetylcholine, the AChR responds by an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane.1 Publication

<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

Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<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 functionIon channel, Ligand-gated ion channel, Receptor
Biological processIon transport, Transport

Enzyme and pathway databases

Pathway Commons web resource for biological pathway data

More...PathwayCommonsi		P11230

Protein family/group databases

Transport Classification Database

More...TCDBi		1.A.9.1.1, the neurotransmitter receptor, cys loop, ligand-gated ion channel (lic) family

<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:
Acetylcholine receptor subunit beta
<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:CHRNB1
Synonyms:ACHRB, CHRNB
<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>OrganismiHomo sapiens (Human)
<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 identifieri9606 [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 lineageiEukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo
<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
  • UP000005640 <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 17

Organism-specific databases

Human Gene Nomenclature Database

More...HGNCi		HGNC:1961, CHRNB1

Online Mendelian Inheritance in Man (OMIM)

More...MIMi		100710, gene

neXtProt; the human protein knowledge platform

More...neXtProti		NX_P11230

Eukaryotic Pathogen, Vector and Host Database Resources

More...VEuPathDBi		HostDB:ENSG00000170175.10

<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 domaini24 – 244ExtracellularSequence analysisAdd BLAST221
<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>Transmembranei245 – 269HelicalSequence analysisAdd BLAST25
Transmembranei277 – 295HelicalSequence analysisAdd BLAST19
Transmembranei311 – 332HelicalSequence analysisAdd BLAST22
Topological domaini333 – 469CytoplasmicSequence analysisAdd BLAST137
Transmembranei470 – 488HelicalSequence analysisAdd BLAST19

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 provides information on the disease(s) associated with genetic variations in a given protein. The information is extracted from the scientific literature and diseases that are also described in the <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=omim">OMIM</a> database are represented with a <a href="http://www.uniprot.org/diseases">controlled vocabulary</a> in the following way:<p><a href='/help/involvement_in_disease' target='_top'>More...</a></p>Involvement in diseasei

Myasthenic syndrome, congenital, 2A, slow-channel (CMS2A)3 Publications
The disease is caused by variants affecting the gene represented in this entry.
Disease descriptionA form of congenital myasthenic syndrome, a group of disorders characterized by failure of neuromuscular transmission, including pre-synaptic, synaptic, and post-synaptic disorders that are not of autoimmune origin. Clinical features are easy fatigability and muscle weakness affecting the axial and limb muscles (with hypotonia in early-onset forms), the ocular muscles (leading to ptosis and ophthalmoplegia), and the facial and bulbar musculature (affecting sucking and swallowing, and leading to dysphonia). The symptoms fluctuate and worsen with physical effort. CMS2A is a slow-channel myasthenic syndrome. It is caused by kinetic abnormalities of the AChR, resulting in prolonged AChR channel opening episodes, prolonged endplate currents, and depolarization block. This is associated with calcium overload, which may contribute to subsequent degeneration of the endplate and postsynaptic membrane.
Related information in OMIM
Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural variantiVAR_000287285L → M in CMS2A. 1 PublicationCorresponds to variant dbSNP:rs137852811EnsemblClinVar.1
Natural variantiVAR_077363289V → A in CMS2A; slow-channel mutation; increases gating equilibrium constant by 33-fold, owing to increased opening rate and decreased closing rate; no effect on the choline dissociation rate constant. 1 Publication1
Natural variantiVAR_000288289V → M in CMS2A. 1 PublicationCorresponds to variant dbSNP:rs137852810EnsemblClinVar.1
Myasthenic syndrome, congenital, 2C, associated with acetylcholine receptor deficiency (CMS2C)1 Publication
The disease is caused by variants affecting the gene represented in this entry.
Disease descriptionA form of congenital myasthenic syndrome, a group of disorders characterized by failure of neuromuscular transmission, including pre-synaptic, synaptic, and post-synaptic disorders that are not of autoimmune origin. Clinical features are easy fatigability and muscle weakness affecting the axial and limb muscles (with hypotonia in early-onset forms), the ocular muscles (leading to ptosis and ophthalmoplegia), and the facial and bulbar musculature (affecting sucking and swallowing, and leading to dysphonia). The symptoms fluctuate and worsen with physical effort. CMS2C is an autosomal recessive disorder of postsynaptic neuromuscular transmission, due to deficiency of AChR at the endplate that results in low amplitude of the miniature endplate potential and current. CMS2C is clinically characterized by early-onset muscle weakness with variable severity.
Related information in OMIM
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_017494449 – 451Missing in CMS2C; impairs AChR assembly by disrupting a specific interaction between beta and delta subunits. 1 Publication3

Keywords - Diseasei

Congenital myasthenic syndrome, Disease variant

Organism-specific databases

DisGeNET

More...DisGeNETi		1140

GeneReviews a resource of expert-authored, peer-reviewed disease descriptions.

More...GeneReviewsi		CHRNB1

MalaCards human disease database

More...MalaCardsi		CHRNB1
MIMi616313, phenotype
616314, phenotype

Open Targets

More...OpenTargetsi		ENSG00000170175

Orphanet; a database dedicated to information on rare diseases and orphan drugs

More...Orphaneti		98913, Postsynaptic congenital myasthenic syndromes

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...PharmGKBi		PA26494

Miscellaneous databases

Pharos NIH Druggable Genome Knowledgebase

More...Pharosi		P11230, Tclin

Chemistry databases

ChEMBL database of bioactive drug-like small molecules

More...ChEMBLi		CHEMBL1907588
CHEMBL3885508
CHEMBL4106145

DrugCentral

More...DrugCentrali		P11230

Genetic variation databases

BioMuta curated single-nucleotide variation and disease association database

More...BioMutai		CHRNB1

Domain mapping of disease mutations (DMDM)

More...DMDMi		21903373

<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 – 23Add BLAST23
<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_000000031524 – 501Acetylcholine receptor subunit betaAdd BLAST478

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 bondi151 ↔ 165By 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>Glycosylationi164N-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 residuei390Phosphotyrosine; by Tyr-kinasesBy similarity1

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein

Proteomic databases

Encyclopedia of Proteome Dynamics

More...EPDi		P11230

jPOST - Japan Proteome Standard Repository/Database

More...jPOSTi		P11230

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...MassIVEi		P11230

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

More...PaxDbi		P11230

PeptideAtlas

More...PeptideAtlasi		P11230

PRoteomics IDEntifications database

More...PRIDEi		P11230

ProteomicsDB: a multi-organism proteome resource

More...ProteomicsDBi		52725 [P11230-1]
6694

PTM databases

GlyGen: Computational and Informatics Resources for Glycoscience

More...GlyGeni		P11230, 1 site

iPTMnet integrated resource for PTMs in systems biology context

More...iPTMneti		P11230

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

More...PhosphoSitePlusi		P11230

<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

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...Bgeei		ENSG00000170175, Expressed in gastrocnemius and 163 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...ExpressionAtlasi		P11230, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...Genevisiblei		P11230, HS

Organism-specific databases

Human Protein Atlas

More...HPAi		ENSG00000170175, Tissue enhanced (skeletal muscle, tongue)

<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

Pentamer of two alpha chains, and one each of the beta, delta, and gamma (in immature muscle) or epsilon (in mature muscle) chains. The muscle heteropentamer composed of alpha-1, beta-1, delta, epsilon subunits interacts with the alpha-conotoxin ImII (PubMed:15609996).

1 Publication

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection">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

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		107562, 29 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...ComplexPortali		CPX-2179, Muscle-type nicotinic acetylcholine receptor complex, alpha1-beta1-delta-gamma
CPX-255, Muscle-type nicotinic acetylcholine receptor complex, alpha1-beta1-delta-epsilon

Protein interaction database and analysis system

More...IntActi		P11230, 2 interactors

STRING: functional protein association networks

More...STRINGi		9606.ENSP00000304290

Chemistry databases

BindingDB database of measured binding affinities

More...BindingDBi		P11230

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...RNActi		P11230, 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

3D structure databases

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

More...SMRi		P11230

Database of comparative protein structure models

More...ModBasei		Search...

<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

<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 ligand-gated ion channel (TC 1.A.9) family. Acetylcholine receptor (TC 1.A.9.1) subfamily. Beta-1/CHRNB1 sub-subfamily. [View classification]Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		KOG3645, Eukaryota

Ensembl GeneTree

More...GeneTreei		ENSGT00940000158661

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_018074_1_4_1

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P11230

Identification of Orthologs from Complete Genome Data

More...OMAi		MILVTCS

Database of Orthologous Groups

More...OrthoDBi		776653at2759

Database for complete collections of gene phylogenies

More...PhylomeDBi		P11230

TreeFam database of animal gene trees

More...TreeFami		TF315605

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...Gene3Di		2.70.170.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR006202, Neur_chan_lig-bd
IPR036734, Neur_chan_lig-bd_sf
IPR006201, Neur_channel
IPR036719, Neuro-gated_channel_TM_sf
IPR006029, Neurotrans-gated_channel_TM
IPR018000, Neurotransmitter_ion_chnl_CS
IPR002394, Nicotinic_acetylcholine_rcpt

The PANTHER Classification System

More...PANTHERi		PTHR18945, PTHR18945, 1 hit

Pfam protein domain database

More...Pfami		View protein in Pfam
PF02931, Neur_chan_LBD, 1 hit
PF02932, Neur_chan_memb, 1 hit

Protein Motif fingerprint database; a protein domain database

More...PRINTSi		PR00254, NICOTINICR
PR00252, NRIONCHANNEL

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF63712, SSF63712, 1 hit
SSF90112, SSF90112, 1 hit

TIGRFAMs; a protein family database

More...TIGRFAMsi		TIGR00860, LIC, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS00236, NEUROTR_ION_CHANNEL, 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 (2+)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 2 <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 2 described isoforms and 4 potential isoforms that are computationally mapped.Show allAlign All

Isoform 1 (identifier: P11230-1) [UniParc]FASTAAdd to basket

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
MTPGALLMLL GALGAPLAPG VRGSEAEGRL REKLFSGYDS SVRPAREVGD 
        60         70         80         90        100
RVRVSVGLIL AQLISLNEKD EEMSTKVYLD LEWTDYRLSW DPAEHDGIDS 
       110        120        130        140        150
LRITAESVWL PDVVLLNNND GNFDVALDIS VVVSSDGSVR WQPPGIYRSS 
       160        170        180        190        200
CSIQVTYFPF DWQNCTMVFS SYSYDSSEVS LQTGLGPDGQ GHQEIHIHEG 
       210        220        230        240        250
TFIENGQWEI IHKPSRLIQP PGDPRGGREG QRQEVIFYLI IRRKPLFYLV 
       260        270        280        290        300
NVIAPCILIT LLAIFVFYLP PDAGEKMGLS IFALLTLTVF LLLLADKVPE 
       310        320        330        340        350
TSLSVPIIIK YLMFTMVLVT FSVILSVVVL NLHHRSPHTH QMPLWVRQIF 
       360        370        380        390        400
IHKLPLYLRL KRPKPERDLM PEPPHCSSPG SGWGRGTDEY FIRKPPSDFL 
       410        420        430        440        450
FPKPNRFQPE LSAPDLRRFI DGPNRAVALL PELREVVSSI SYIARQLQEQ 
       460        470        480        490        500
EDHDALKEDW QFVAMVVDRL FLWTFIIFTS VGTLVIFLDA TYHLPPPDPF 

P
Length:501
Mass (Da):56,698
Last modified:July 11, 2002 - v3
<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:i365CBFA795A51394
GO
Isoform 2 (identifier: P11230-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     1-72: Missing.

Show »
Length:429
Mass (Da):49,083
Checksum:iC0A42E7DC9C3A85B
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 4 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
I3L3Q9I3L3Q9_HUMAN
Acetylcholine receptor subunit beta
CHRNB1
316Annotation 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>
I3L1T7I3L1T7_HUMAN
Acetylcholine receptor subunit beta
CHRNB1
380Annotation 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>
I3L4N5I3L4N5_HUMAN
Acetylcholine receptor subunit beta
CHRNB1
158Annotation 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>
I3L535I3L535_HUMAN
Acetylcholine receptor subunit beta
CHRNB1
37Annotation score:

Annotation score:1 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 conflicti15A → P in CAA32939 (PubMed:2740233).Curated1
Sequence conflicti210I → N in CAA32939 (PubMed:2740233).Curated1

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_04816932E → G1 PublicationCorresponds to variant dbSNP:rs17856697EnsemblClinVar.1
Natural variantiVAR_070842124D → Y1 PublicationCorresponds to variant dbSNP:rs17856698Ensembl.1
Natural variantiVAR_000287285L → M in CMS2A. 1 PublicationCorresponds to variant dbSNP:rs137852811EnsemblClinVar.1
Natural variantiVAR_077363289V → A in CMS2A; slow-channel mutation; increases gating equilibrium constant by 33-fold, owing to increased opening rate and decreased closing rate; no effect on the choline dissociation rate constant. 1 Publication1
Natural variantiVAR_000288289V → M in CMS2A. 1 PublicationCorresponds to variant dbSNP:rs137852810EnsemblClinVar.1
Natural variantiVAR_017494449 – 451Missing in CMS2C; impairs AChR assembly by disrupting a specific interaction between beta and delta subunits. 1 Publication3

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_0566751 – 72Missing in isoform 2. 1 PublicationAdd BLAST72

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
X14830 mRNA Translation: CAA32939.1
AK298938 mRNA Translation: BAH12907.1
AC113189 Genomic DNA No translation available.
BC011371 mRNA Translation: AAH11371.1
BC023553 mRNA Translation: AAH23553.1

The Consensus CDS (CCDS) project

More...CCDSi		CCDS11106.1 [P11230-1]

Protein sequence database of the Protein Information Resource

More...PIRi		S04607

NCBI Reference Sequences

More...RefSeqi		NP_000738.2, NM_000747.2 [P11230-1]

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...Ensembli		ENST00000306071; ENSP00000304290; ENSG00000170175 [P11230-1]
ENST00000536404; ENSP00000439209; ENSG00000170175 [P11230-2]
ENST00000639692; ENSP00000492221; ENSG00000283946 [P11230-1]
ENST00000639993; ENSP00000491113; ENSG00000283946 [P11230-2]

Database of genes from NCBI RefSeq genomes

More...GeneIDi		1140

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		hsa:1140

UCSC genome browser

More...UCSCi		uc002ghb.4, human [P11230-1]

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
X14830 mRNA Translation: CAA32939.1
AK298938 mRNA Translation: BAH12907.1
AC113189 Genomic DNA No translation available.
BC011371 mRNA Translation: AAH11371.1
BC023553 mRNA Translation: AAH23553.1
CCDSiCCDS11106.1 [P11230-1]
PIRiS04607
RefSeqiNP_000738.2, NM_000747.2 [P11230-1]

3D structure databases

SMRiP11230
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi107562, 29 interactors
ComplexPortaliCPX-2179, Muscle-type nicotinic acetylcholine receptor complex, alpha1-beta1-delta-gamma
CPX-255, Muscle-type nicotinic acetylcholine receptor complex, alpha1-beta1-delta-epsilon
IntActiP11230, 2 interactors
STRINGi9606.ENSP00000304290

Chemistry databases

BindingDBiP11230
ChEMBLiCHEMBL1907588
CHEMBL3885508
CHEMBL4106145
DrugCentraliP11230

Protein family/group databases

TCDBi1.A.9.1.1, the neurotransmitter receptor, cys loop, ligand-gated ion channel (lic) family

PTM databases

GlyGeniP11230, 1 site
iPTMnetiP11230
PhosphoSitePlusiP11230

Genetic variation databases

BioMutaiCHRNB1
DMDMi21903373

Proteomic databases

EPDiP11230
jPOSTiP11230
MassIVEiP11230
PaxDbiP11230
PeptideAtlasiP11230
PRIDEiP11230
ProteomicsDBi52725 [P11230-1]
6694

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...Antibodypediai		992, 251 antibodies

The DNASU plasmid repository

More...DNASUi		1140

Genome annotation databases

EnsembliENST00000306071; ENSP00000304290; ENSG00000170175 [P11230-1]
ENST00000536404; ENSP00000439209; ENSG00000170175 [P11230-2]
ENST00000639692; ENSP00000492221; ENSG00000283946 [P11230-1]
ENST00000639993; ENSP00000491113; ENSG00000283946 [P11230-2]
GeneIDi1140
KEGGihsa:1140
UCSCiuc002ghb.4, human [P11230-1]

Organism-specific databases

Comparative Toxicogenomics Database

More...CTDi		1140
DisGeNETi1140

GeneCards: human genes, protein and diseases

More...GeneCardsi		CHRNB1
GeneReviewsiCHRNB1
HGNCiHGNC:1961, CHRNB1
HPAiENSG00000170175, Tissue enhanced (skeletal muscle, tongue)
MalaCardsiCHRNB1
MIMi100710, gene
616313, phenotype
616314, phenotype
neXtProtiNX_P11230
OpenTargetsiENSG00000170175
Orphaneti98913, Postsynaptic congenital myasthenic syndromes
PharmGKBiPA26494
VEuPathDBiHostDB:ENSG00000170175.10

GenAtlas: human gene database

More...GenAtlasi		Search...

Phylogenomic databases

eggNOGiKOG3645, Eukaryota
GeneTreeiENSGT00940000158661
HOGENOMiCLU_018074_1_4_1
InParanoidiP11230
OMAiMILVTCS
OrthoDBi776653at2759
PhylomeDBiP11230
TreeFamiTF315605

Enzyme and pathway databases

PathwayCommonsiP11230

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...BioGRID-ORCSi		1140, 5 hits in 870 CRISPR screens

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

More...ChiTaRSi		CHRNB1, human

The Gene Wiki collection of pages on human genes and proteins

More...GeneWikii		CHRNB1

Database of phenotypes from RNA interference screens in Drosophila and Homo sapiens

More...GenomeRNAii		1140
PharosiP11230, Tclin

Protein Ontology

More...PROi		PR:P11230
RNActiP11230, protein

The Stanford Online Universal Resource for Clones and ESTs

More...SOURCEi		Search...

Gene expression databases

BgeeiENSG00000170175, Expressed in gastrocnemius and 163 other tissues
ExpressionAtlasiP11230, baseline and differential
GenevisibleiP11230, HS

Family and domain databases

Gene3Di2.70.170.10, 1 hit
InterProiView protein in InterPro
IPR006202, Neur_chan_lig-bd
IPR036734, Neur_chan_lig-bd_sf
IPR006201, Neur_channel
IPR036719, Neuro-gated_channel_TM_sf
IPR006029, Neurotrans-gated_channel_TM
IPR018000, Neurotransmitter_ion_chnl_CS
IPR002394, Nicotinic_acetylcholine_rcpt
PANTHERiPTHR18945, PTHR18945, 1 hit
PfamiView protein in Pfam
PF02931, Neur_chan_LBD, 1 hit
PF02932, Neur_chan_memb, 1 hit
PRINTSiPR00254, NICOTINICR
PR00252, NRIONCHANNEL
SUPFAMiSSF63712, SSF63712, 1 hit
SSF90112, SSF90112, 1 hit
TIGRFAMsiTIGR00860, LIC, 1 hit
PROSITEiView protein in PROSITE
PS00236, NEUROTR_ION_CHANNEL, 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 nameiACHB_HUMAN
<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: P11230
Secondary accession number(s): B7Z5H1, Q8IZ46, Q96FB8
<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 1, 1989
Last sequence update: July 11, 2002
Last modified: February 10, 2021
This is version 221 of the entry and version 3 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
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

<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

Reference proteome

Documents

  1. Human chromosome 17
    Human chromosome 17: entries, gene names and cross-references to MIM
  2. Human entries with genetic variants
    List of human entries with genetic variants
  3. Human variants curated from literature reports
    Index of human variants curated from literature reports
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. SIMILARITY comments
    Index of protein domains and families
UniProt is an ELIXIR core data resource
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