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UniProtKB - P30926 (ACHB4_HUMAN)

Entry version 203 (10 Feb 2021)
Sequence version 2 (01 Nov 1997)
Previous versions | rss
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Protein

Neuronal acetylcholine receptor subunit beta-4

Gene

CHRNB4

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.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections ('Function', 'PTM / Processing', 'Pathology and Biotech') according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei82Key residue that facilitates effective access of the conotoxin BuIA to the channel binding siteBy similarity1
Sitei134Key residue for a low dissociation (K(off)) from the conotoxin BuIABy similarity1

<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		P30926

Reactome - a knowledgebase of biological pathways and processes

More...Reactomei		R-HSA-629587, Highly sodium permeable postsynaptic acetylcholine nicotinic receptors
R-HSA-629594, Highly calcium permeable postsynaptic nicotinic acetylcholine receptors
R-HSA-629597, Highly calcium permeable nicotinic acetylcholine receptors
R-HSA-6798695, Neutrophil degranulation

<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:
Neuronal acetylcholine receptor subunit beta-4
<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:CHRNB4
<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 15

Organism-specific databases

Human Gene Nomenclature Database

More...HGNCi		HGNC:1964, CHRNB4

Online Mendelian Inheritance in Man (OMIM)

More...MIMi		118509, gene

neXtProt; the human protein knowledge platform

More...neXtProti		NX_P30926

Eukaryotic Pathogen, Vector and Host Database Resources

More...VEuPathDBi		HostDB:ENSG00000117971.11

<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 – 236ExtracellularSequence analysisAdd BLAST215
<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>Transmembranei237 – 257HelicalSequence analysisAdd BLAST21
Topological domaini258 – 265CytoplasmicSequence analysis8
Transmembranei266 – 286HelicalSequence analysisAdd BLAST21
Topological domaini287 – 298ExtracellularSequence analysisAdd BLAST12
Transmembranei299 – 319HelicalSequence analysisAdd BLAST21
Topological domaini320 – 460CytoplasmicSequence analysisAdd BLAST141
Transmembranei461 – 481HelicalSequence analysisAdd BLAST21
Topological domaini482 – 498ExtracellularSequence analysisAdd BLAST17

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

Organism-specific databases

DisGeNET

More...DisGeNETi		1143

Open Targets

More...OpenTargetsi		ENSG00000117971

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...PharmGKBi		PA26496

Miscellaneous databases

Pharos NIH Druggable Genome Knowledgebase

More...Pharosi		P30926, Tclin

Chemistry databases

ChEMBL database of bioactive drug-like small molecules

More...ChEMBLi		CHEMBL1907591
CHEMBL1907594
CHEMBL2109230
CHEMBL3038459
CHEMBL3137273
CHEMBL3137285
CHEMBL3885595

Drug and drug target database

More...DrugBanki		DB00237, Butabarbital
DB00514, Dextromethorphan
DB07720, Epibatidine
DB00898, Ethanol
DB00472, Fluoxetine
DB01227, Levacetylmethadol
DB00184, Nicotine
DB01090, Pentolinium

DrugCentral

More...DrugCentrali		P30926

Genetic variation databases

BioMuta curated single-nucleotide variation and disease association database

More...BioMutai		CHRNB4

Domain mapping of disease mutations (DMDM)

More...DMDMi		2506129

<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_000000038922 – 498Neuronal acetylcholine receptor subunit beta-4Add BLAST477

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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>Glycosylationi36N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi93N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi138N-linked (GlcNAc...) asparagineSequence analysis1
<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 bondi153 ↔ 167By similarity
Glycosylationi166N-linked (GlcNAc...) asparagineSequence analysis1

Keywords - PTMi

Disulfide bond, Glycoprotein

Proteomic databases

Encyclopedia of Proteome Dynamics

More...EPDi		P30926

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...MassIVEi		P30926

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

More...PaxDbi		P30926

PeptideAtlas

More...PeptideAtlasi		P30926

PRoteomics IDEntifications database

More...PRIDEi		P30926

ProteomicsDB: a multi-organism proteome resource

More...ProteomicsDBi		20517
54746 [P30926-1]

PTM databases

GlyGen: Computational and Informatics Resources for Glycoscience

More...GlyGeni		P30926, 4 sites

iPTMnet integrated resource for PTMs in systems biology context

More...iPTMneti		P30926

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

More...PhosphoSitePlusi		P30926

<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		ENSG00000117971, Expressed in right testis and 92 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...ExpressionAtlasi		P30926, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...Genevisiblei		P30926, HS

Organism-specific databases

Human Protein Atlas

More...HPAi		ENSG00000117971, Group enriched (adrenal gland, lymphoid tissue, retina, testis)

<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

Neuronal AChR is composed of two different types of subunits: alpha and beta. Beta-4 subunit can be combined to alpha-2, alpha-3 or alpha-4 to give rise to functional receptors.

Interacts with RIC3; which is required for proper folding and assembly (PubMed:16120769).

Interacts with LYPD6 (PubMed:27344019). The pentamer alpha3-beta-4 interacts with the conotoxin BuIA (By similarity). The heteropentamer composed of alpha-3 and beta-4 subunits interacts with the alpha-conotoxin ImI (PubMed:15609996).

By similarity3 Publications

<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		107565, 79 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...ComplexPortali		CPX-210, Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha5-beta4
CPX-213, Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha6-beta4
CPX-2190, Neuronal nicotinic acetylcholine receptor complex, alpha2-beta4
CPX-2200, Neuronal nicotinic acetylcholine receptor complex, alpha3-beta4
CPX-2203, Neuronal nicotinic acetylcholine receptor complex, alpha4-beta4

CORUM comprehensive resource of mammalian protein complexes

More...CORUMi		P30926

Protein interaction database and analysis system

More...IntActi		P30926, 3 interactors

STRING: functional protein association networks

More...STRINGi		9606.ENSP00000261751

Chemistry databases

BindingDB database of measured binding affinities

More...BindingDBi		P30926

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...RNActi		P30926, 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

1498
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

More...SMRi		P30926

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		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-4/CHRNB4 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		ENSGT00940000158708

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_018074_1_1_1

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P30926

Identification of Orthologs from Complete Genome Data

More...OMAi		PSKLYGN

Database of Orthologous Groups

More...OrthoDBi		381858at2759

Database for complete collections of gene phylogenies

More...PhylomeDBi		P30926

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 1 potential isoform that is computationally mapped.Show allAlign All

Isoform 1 (identifier: P30926-1) [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
MRRAPSLVLF FLVALCGRGN CRVANAEEKL MDDLLNKTRY NNLIRPATSS 
        60         70         80         90        100
SQLISIKLQL SLAQLISVNE REQIMTTNVW LKQEWTDYRL TWNSSRYEGV 
       110        120        130        140        150
NILRIPAKRI WLPDIVLYNN ADGTYEVSVY TNLIVRSNGS VLWLPPAIYK 
       160        170        180        190        200
SACKIEVKYF PFDQQNCTLK FRSWTYDHTE IDMVLMTPTA SMDDFTPSGE 
       210        220        230        240        250
WDIVALPGRR TVNPQDPSYV DVTYDFIIKR KPLFYTINLI IPCVLTTLLA 
       260        270        280        290        300
ILVFYLPSDC GEKMTLCISV LLALTFFLLL ISKIVPPTSL DVPLIGKYLM 
       310        320        330        340        350
FTMVLVTFSI VTSVCVLNVH HRSPSTHTMA PWVKRCFLHK LPTFLFMKRP 
       360        370        380        390        400
GPDSSPARAF PPSKSCVTKP EATATSTSPS NFYGNSMYFV NPASAASKSP 
       410        420        430        440        450
AGSTPVAIPR DFWLRSSGRF RQDVQEALEG VSFIAQHMKN DDEDQSVVED 
       460        470        480        490 
WKYVAMVVDR LFLWVFMFVC VLGTVGLFLP PLFQTHAASE GPYAAQRD
Length:498
Mass (Da):56,380
Last modified:November 1, 1997 - v2
<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:i0D48AB203F3FD03E
GO
Isoform 2 (identifier: P30926-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     120-217: NADGTYEVSV...GRRTVNPQDP → KSLRTGSTWL...GKDGGLGCPL
     218-498: Missing.

Show »
Length:231
Mass (Da):25,862
Checksum:i4182D0886DD041BE
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
H3BU02H3BU02_HUMAN
Neuronal acetylcholine receptor sub...
CHRNB4
66Annotation 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 conflicti72 – 73EQ → DE in CAA48336 (PubMed:1330682).Curated2
Sequence conflicti121Missing in CAC34819 (Ref. 4) Curated1

Natural variant

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_04817491T → I. Corresponds to variant dbSNP:rs12914008Ensembl.1
Natural variantiVAR_013241136R → W1 PublicationCorresponds to variant dbSNP:rs141876090Ensembl.1
Natural variantiVAR_013242140S → G1 PublicationCorresponds to variant dbSNP:rs56218866Ensembl.1
Natural variantiVAR_013243467M → V1 PublicationCorresponds to variant dbSNP:rs61737502Ensembl.1

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_046674120 – 217NADGT…NPQDP → KSLRTGSTWLWWWTGCSCGC SCLCASWALWGSSYRPSSRP MQLLRGPTLPSVTEGPLGCG VRGCEWPGGHFAASFWVVAD EALSKYVSIGHQPHQTSHSR GTGKDGGLGCPL in isoform 2. 1 PublicationAdd BLAST98
Alternative sequenceiVSP_046675218 – 498Missing in isoform 2. 1 PublicationAdd BLAST281

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
U62439 mRNA Translation: AAB40117.1
U48861 mRNA Translation: AAA92123.1
Y08416 mRNA Translation: CAA69693.1
AJ306454 AJ306459 Genomic DNA Translation: CAC34819.1
AF306329 AF306328 Genomic DNA Translation: AAL02062.1
AC022748 Genomic DNA No translation available.
AC067863 Genomic DNA No translation available.
BC096080 mRNA Translation: AAH96080.1
BC096081 mRNA Translation: AAH96081.1
BC096083 mRNA Translation: AAH96083.1
BC096082 mRNA Translation: AAH96082.1
AF453877 Genomic DNA Translation: AAL57840.1
X68275 mRNA Translation: CAA48336.1

The Consensus CDS (CCDS) project

More...CCDSi		CCDS10306.1 [P30926-1]
CCDS58392.1 [P30926-2]

Protein sequence database of the Protein Information Resource

More...PIRi		G02421

NCBI Reference Sequences

More...RefSeqi		NP_000741.1, NM_000750.3 [P30926-1]
NP_001243496.1, NM_001256567.1 [P30926-2]

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...Ensembli		ENST00000261751; ENSP00000261751; ENSG00000117971 [P30926-1]
ENST00000412074; ENSP00000416386; ENSG00000117971 [P30926-2]

Database of genes from NCBI RefSeq genomes

More...GeneIDi		1143

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		hsa:1143

UCSC genome browser

More...UCSCi		uc002bed.2, human [P30926-1]

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
U62439 mRNA Translation: AAB40117.1
U48861 mRNA Translation: AAA92123.1
Y08416 mRNA Translation: CAA69693.1
AJ306454 AJ306459 Genomic DNA Translation: CAC34819.1
AF306329 AF306328 Genomic DNA Translation: AAL02062.1
AC022748 Genomic DNA No translation available.
AC067863 Genomic DNA No translation available.
BC096080 mRNA Translation: AAH96080.1
BC096081 mRNA Translation: AAH96081.1
BC096083 mRNA Translation: AAH96083.1
BC096082 mRNA Translation: AAH96082.1
AF453877 Genomic DNA Translation: AAL57840.1
X68275 mRNA Translation: CAA48336.1
CCDSiCCDS10306.1 [P30926-1]
CCDS58392.1 [P30926-2]
PIRiG02421
RefSeqiNP_000741.1, NM_000750.3 [P30926-1]
NP_001243496.1, NM_001256567.1 [P30926-2]

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
2ASGmodel-B/D/E262-284[»]
6PV7electron microscopy3.34B/C/E22-361[»]
B/C/E417-498[»]
6PV8electron microscopy3.87B/C/E22-361[»]
B/C/E417-498[»]
SMRiP30926
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi107565, 79 interactors
ComplexPortaliCPX-210, Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha5-beta4
CPX-213, Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha6-beta4
CPX-2190, Neuronal nicotinic acetylcholine receptor complex, alpha2-beta4
CPX-2200, Neuronal nicotinic acetylcholine receptor complex, alpha3-beta4
CPX-2203, Neuronal nicotinic acetylcholine receptor complex, alpha4-beta4
CORUMiP30926
IntActiP30926, 3 interactors
STRINGi9606.ENSP00000261751

Chemistry databases

BindingDBiP30926
ChEMBLiCHEMBL1907591
CHEMBL1907594
CHEMBL2109230
CHEMBL3038459
CHEMBL3137273
CHEMBL3137285
CHEMBL3885595
DrugBankiDB00237, Butabarbital
DB00514, Dextromethorphan
DB07720, Epibatidine
DB00898, Ethanol
DB00472, Fluoxetine
DB01227, Levacetylmethadol
DB00184, Nicotine
DB01090, Pentolinium
DrugCentraliP30926

PTM databases

GlyGeniP30926, 4 sites
iPTMnetiP30926
PhosphoSitePlusiP30926

Genetic variation databases

BioMutaiCHRNB4
DMDMi2506129

Proteomic databases

EPDiP30926
MassIVEiP30926
PaxDbiP30926
PeptideAtlasiP30926
PRIDEiP30926
ProteomicsDBi20517
54746 [P30926-1]

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...Antibodypediai		15128, 169 antibodies

Genome annotation databases

EnsembliENST00000261751; ENSP00000261751; ENSG00000117971 [P30926-1]
ENST00000412074; ENSP00000416386; ENSG00000117971 [P30926-2]
GeneIDi1143
KEGGihsa:1143
UCSCiuc002bed.2, human [P30926-1]

Organism-specific databases

Comparative Toxicogenomics Database

More...CTDi		1143
DisGeNETi1143

GeneCards: human genes, protein and diseases

More...GeneCardsi		CHRNB4
HGNCiHGNC:1964, CHRNB4
HPAiENSG00000117971, Group enriched (adrenal gland, lymphoid tissue, retina, testis)
MIMi118509, gene
neXtProtiNX_P30926
OpenTargetsiENSG00000117971
PharmGKBiPA26496
VEuPathDBiHostDB:ENSG00000117971.11

GenAtlas: human gene database

More...GenAtlasi		Search...

Phylogenomic databases

eggNOGiKOG3645, Eukaryota
GeneTreeiENSGT00940000158708
HOGENOMiCLU_018074_1_1_1
InParanoidiP30926
OMAiPSKLYGN
OrthoDBi381858at2759
PhylomeDBiP30926
TreeFamiTF315605

Enzyme and pathway databases

PathwayCommonsiP30926
ReactomeiR-HSA-629587, Highly sodium permeable postsynaptic acetylcholine nicotinic receptors
R-HSA-629594, Highly calcium permeable postsynaptic nicotinic acetylcholine receptors
R-HSA-629597, Highly calcium permeable nicotinic acetylcholine receptors
R-HSA-6798695, Neutrophil degranulation

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...BioGRID-ORCSi		1143, 3 hits in 871 CRISPR screens

The Gene Wiki collection of pages on human genes and proteins

More...GeneWikii		CHRNB4

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

More...GenomeRNAii		1143
PharosiP30926, Tclin

Protein Ontology

More...PROi		PR:P30926
RNActiP30926, protein

The Stanford Online Universal Resource for Clones and ESTs

More...SOURCEi		Search...

Gene expression databases

BgeeiENSG00000117971, Expressed in right testis and 92 other tissues
ExpressionAtlasiP30926, baseline and differential
GenevisibleiP30926, 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 nameiACHB4_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: P30926
Secondary accession number(s): A4FTX5
, E9PHE8, Q16607, Q4VBA5, Q8WXC8, Q9BQR4
<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, 1993
Last sequence update: November 1, 1997
Last modified: February 10, 2021
This is version 203 of the entry and version 2 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

3D-structure, Reference proteome

Documents

  1. Human chromosome 15
    Human chromosome 15: 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. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  6. SIMILARITY comments
    Index of protein domains and families
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