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Entry version 143 (13 Nov 2019)
Sequence version 1 (01 Jun 2001)
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Protein

U2 small nuclear ribonucleoprotein B''

Gene

Snrpb2

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

Annotation score:3 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

Involved in pre-mRNA splicing as component of the spliceosome. Associated with sn-RNP U2, where it contributes to the binding of stem loop IV of U2 snRNA.By similarity

<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 functionRibonucleoprotein, RNA-binding
Biological processmRNA processing, mRNA splicing

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-72163 mRNA Splicing - Major Pathway

<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_and_taxonomy_section">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:
U2 small nuclear ribonucleoprotein B''
Short name:
U2 snRNP B''
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:Snrpb2
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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_and_taxonomy_section">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_and_taxonomy_section">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_and_taxonomy_section">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_manual">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 2

Organism-specific databases

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

More...
MGIi
MGI:104805 Snrpb2

<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

Keywords - Cellular componenti

Nucleus, Spliceosome

<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 describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00000818931 – 225U2 small nuclear ribonucleoprotein B''Add BLAST225

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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 residuei111N6-acetyllysine; alternateCombined sources1
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section describes <strong>covalent linkages</strong> of various types formed <strong>between two proteins (interchain cross-links)</strong> or <strong>between two parts of the same protein (intrachain cross-links)</strong>, except the disulfide bonds that are annotated in the <a href="http://www.uniprot.org/manual/disulfid">'Disulfide bond'</a> subsection.<p><a href='/help/crosslnk' target='_top'>More...</a></p>Cross-linki111Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2); alternateBy similarity
Modified residuei151PhosphotyrosineBy similarity1

Keywords - PTMi

Acetylation, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

Encyclopedia of Proteome Dynamics

More...
EPDi
Q9CQI7

MaxQB - The MaxQuant DataBase

More...
MaxQBi
Q9CQI7

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

More...
PaxDbi
Q9CQI7

PeptideAtlas

More...
PeptideAtlasi
Q9CQI7

PRoteomics IDEntifications database

More...
PRIDEi
Q9CQI7

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
Q9CQI7

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

More...
PhosphoSitePlusi
Q9CQI7

<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
ENSMUSG00000008333 Expressed in 284 organ(s), highest expression level in mandibular prominence

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
Q9CQI7 baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q9CQI7 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_section">'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_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Identified in the spliceosome B complex. Identified in the spliceosome C complex. Present in a spliceosome complex assembled in vitro, and composed of SNRPB2, HPRP8BP and CRNKL1. Contributes to the binding of stem loop IV of U2 snRNA with SNRPP1.

By similarity

Protein-protein interaction databases

Protein interaction database and analysis system

More...
IntActi
Q9CQI7, 1 interactor

Molecular INTeraction database

More...
MINTi
Q9CQI7

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000008477

<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
Q9CQI7

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

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">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>Domaini7 – 86RRM 1PROSITE-ProRule annotationAdd BLAST80
Domaini151 – 225RRM 2PROSITE-ProRule annotationAdd BLAST75

<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 RRM U1 A/B'' family.Curated

Keywords - Domaini

Repeat

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG4206 Eukaryota
ENOG410XPZI LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00390000007046

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000217519

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q9CQI7

KEGG Orthology (KO)

More...
KOi
K11094

Identification of Orthologs from Complete Genome Data

More...
OMAi
VISKMRG

Database of Orthologous Groups

More...
OrthoDBi
1608132at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q9CQI7

TreeFam database of animal gene trees

More...
TreeFami
TF313834

Family and domain databases

Conserved Domains Database

More...
CDDi
cd12478 RRM1_U2B, 1 hit
cd12481 RRM2_U2B, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.30.70.330, 2 hits

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR012677 Nucleotide-bd_a/b_plait_sf
IPR035979 RBD_domain_sf
IPR000504 RRM_dom
IPR034564 U2B''_RRM1
IPR034562 U2B''_RRM2

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00076 RRM_1, 2 hits

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00360 RRM, 2 hits

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF54928 SSF54928, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50102 RRM, 2 hits

<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_length">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>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All

Q9CQI7-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MDIRPNHTIY INNMNDKIKK EELKRSLYAL FSQFGHVVDI VALKTMKMRG
60 70 80 90 100
QAFVIFKELG SSTNALRQLQ GFPFYGKPMR IQYAKTDSDI ISKMRGTFAD
110 120 130 140 150
KEKKKEKKKA KTMEQAAAAA NKKPGQGTPN AANTQGTAAP NPQVPDYPPN
160 170 180 190 200
YILFLNNLPE ETNEMMLSML FNQFPGFKEV RLVPGRHDIA FVEFENDGQA
210 220
GAARDALQGF KITPSHAMKI TYAKK
Length:225
Mass (Da):25,323
Last modified:June 1, 2001 - 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:i88C7A298D7FC1A0D
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 is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
A2CES4A2CES4_MOUSE
U2 small nuclear ribonucleoprotein ...
Snrpb2
143Annotation 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 conflicti196N → Y in BAB28565 (PubMed:16141072).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AK005107 mRNA Translation: BAB23823.1
AK011274 mRNA Translation: BAB27510.1
AK012944 mRNA Translation: BAB28565.1
AK013871 mRNA Translation: BAB29026.1
BC026794 mRNA Translation: AAH26794.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS16808.1

NCBI Reference Sequences

More...
RefSeqi
NP_067310.1, NM_021335.3

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000008477; ENSMUSP00000008477; ENSMUSG00000008333

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
20639

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mmu:20639

UCSC genome browser

More...
UCSCi
uc008mqb.1 mouse

<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
AK005107 mRNA Translation: BAB23823.1
AK011274 mRNA Translation: BAB27510.1
AK012944 mRNA Translation: BAB28565.1
AK013871 mRNA Translation: BAB29026.1
BC026794 mRNA Translation: AAH26794.1
CCDSiCCDS16808.1
RefSeqiNP_067310.1, NM_021335.3

3D structure databases

SMRiQ9CQI7
ModBaseiSearch...

Protein-protein interaction databases

IntActiQ9CQI7, 1 interactor
MINTiQ9CQI7
STRINGi10090.ENSMUSP00000008477

PTM databases

iPTMnetiQ9CQI7
PhosphoSitePlusiQ9CQI7

Proteomic databases

EPDiQ9CQI7
MaxQBiQ9CQI7
PaxDbiQ9CQI7
PeptideAtlasiQ9CQI7
PRIDEiQ9CQI7

Genome annotation databases

EnsembliENSMUST00000008477; ENSMUSP00000008477; ENSMUSG00000008333
GeneIDi20639
KEGGimmu:20639
UCSCiuc008mqb.1 mouse

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
6629
MGIiMGI:104805 Snrpb2

Phylogenomic databases

eggNOGiKOG4206 Eukaryota
ENOG410XPZI LUCA
GeneTreeiENSGT00390000007046
HOGENOMiHOG000217519
InParanoidiQ9CQI7
KOiK11094
OMAiVISKMRG
OrthoDBi1608132at2759
PhylomeDBiQ9CQI7
TreeFamiTF313834

Enzyme and pathway databases

ReactomeiR-MMU-72163 mRNA Splicing - Major Pathway

Miscellaneous databases

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

More...
ChiTaRSi
Snrpb2 mouse

Protein Ontology

More...
PROi
PR:Q9CQI7

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000008333 Expressed in 284 organ(s), highest expression level in mandibular prominence
ExpressionAtlasiQ9CQI7 baseline and differential
GenevisibleiQ9CQI7 MM

Family and domain databases

CDDicd12478 RRM1_U2B, 1 hit
cd12481 RRM2_U2B, 1 hit
Gene3Di3.30.70.330, 2 hits
InterProiView protein in InterPro
IPR012677 Nucleotide-bd_a/b_plait_sf
IPR035979 RBD_domain_sf
IPR000504 RRM_dom
IPR034564 U2B''_RRM1
IPR034562 U2B''_RRM2
PfamiView protein in Pfam
PF00076 RRM_1, 2 hits
SMARTiView protein in SMART
SM00360 RRM, 2 hits
SUPFAMiSSF54928 SSF54928, 1 hit
PROSITEiView protein in PROSITE
PS50102 RRM, 2 hits

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 nameiRU2B_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: Q9CQI7
Secondary accession number(s): Q9CW35, Q9CZ66
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: September 27, 2004
Last sequence update: June 1, 2001
Last modified: November 13, 2019
This is version 143 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

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
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