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Entry version 153 (02 Jun 2021)
Sequence version 1 (01 Jan 1998)
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Protein
Submitted name:

Nicotinic acetylcholine receptor alpha 3 subunit

Gene

nAChRalpha3

Organism
Drosophila melanogaster (Fruit fly)
Status
Unreviewed-Annotation score:

Annotation score:4 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 transcript 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

<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 functionIon channel, Ligand-gated ion channelARBA annotation, ReceptorImportedARBA annotation
Biological processIon transport, Transport

<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
Submitted name:
Nicotinic acetylcholine receptor alpha 3 subunitImported
<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:nAChRalpha3Imported
Synonyms:nAcR-alpha-7EImported, nACRalpha-7EImported, nAcRalpha-7EImported
ORF Names:CG2302Imported
<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>OrganismiDrosophila melanogaster (Fruit fly)Imported
<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 identifieri7227 [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 lineageiEukaryotaMetazoaEcdysozoaArthropodaHexapodaInsectaPterygotaNeopteraEndopterygotaDipteraBrachyceraMuscomorphaEphydroideaDrosophilidaeDrosophilaSophophora

Organism-specific databases

Drosophila genome database

More...
FlyBasei
FBgn0015519, nAChRalpha3

<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

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 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>Transmembranei242 – 265HelicalUniRule annotationAdd BLAST24
Transmembranei277 – 295HelicalUniRule annotationAdd BLAST19
Transmembranei307 – 328HelicalUniRule annotationAdd BLAST22
Transmembranei744 – 764HelicalUniRule annotationAdd BLAST21

Keywords - Cellular componenti

Cell junction, Cell membraneARBA annotation, Membrane, Postsynaptic cell membraneARBA annotation, Synapse

<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 – 22UniRule annotationAdd BLAST22
<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_502226166823 – 795UniRule annotationAdd BLAST773

Keywords - PTMi

Disulfide bondARBA annotation, GlycoproteinARBA annotation

<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
FBgn0015519, Expressed in brain and 16 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
O18394, baseline and differential

<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

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

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini27 – 241Neur_chan_LBDInterPro annotationAdd BLAST215
Domaini248 – 760Neur_chan_membInterPro annotationAdd BLAST513

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni491 – 556DisorderedSequence analysisAdd BLAST66
Regioni607 – 643DisorderedSequence analysisAdd BLAST37

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular type of amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi491 – 509Polar residuesSequence analysisAdd BLAST19
Compositional biasi523 – 556Polar residuesSequence analysisAdd BLAST34
Compositional biasi607 – 632Polar residuesSequence analysisAdd BLAST26

<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. [View classification]UniRule annotation

Keywords - Domaini

SignalUniRule annotation, Transmembrane, Transmembrane helixUniRule annotationARBA annotation

Phylogenomic databases

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_018074_1_1_1

Identification of Orthologs from Complete Genome Data

More...
OMAi
HIDEIRG

Database for complete collections of gene phylogenies

More...
PhylomeDBi
O18394

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, 2 hits

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>Sequencei

<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.

O18394-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MKWFQVTIDM ILVLSFISSS TANPDAKRLY DDLLSNYNKL VRPVVNVTDA
60 70 80 90 100
LTVRIKLKLS QLIDVNLKNQ IMTTNLWVEQ SWYDYKLKWE PKEYGGVEML
110 120 130 140 150
HVPSDHIWRP DIVLYNNADG NFEVTLATKA TLNYTGRVEW RPPAIYKSSC
160 170 180 190 200
EIDVEYFPFD EQTCVMKFGS WTYDGFQVDL RHIDELNGTN VVEVGVDLSE
210 220 230 240 250
FYTSVEWDIL EVPAVRNEKF YTCCDEPYLD ITFNITMRRK TLFYTVNLII
260 270 280 290 300
PCMGISFLTI LVFYLPSDSG EKVSLSISIL LSLTVFFLLL AEIIPPTSLV
310 320 330 340 350
VPLLGKFVLF TMILDTFSIC VTVLVLNIHF RSPQTHTMAP WVRTVFINQL
360 370 380 390 400
PRFLVMRRPL YPISEMIKSS RRLMVRTCNG LELRDQIPPL PPPVALSRMH
410 420 430 440 450
HSPKTTSRST SPHLQHRVQT YNLMDECGMG MGGGASTITG HLSSLYPPTM
460 470 480 490 500
STANQQTSTT SSLIDAQYHN QYQQTGGSLL DHPLTPTKFR QMTSTSSQTG
510 520 530 540 550
QNGSGNGNGN GGYGGHGRSG GHHLYRQQSS CSANFSPLPQ HAHQAHASTT
560 570 580 590 600
TSDLGMANPN VIKSTTTVNS VATASTLADS CCSGTIQIHQ GMGAGAACQS
610 620 630 640 650
SELLHHQQLH HQQMHHQQQQ QQQQQHHHHQ RPTTSAAAAA AAAAAGGPST
660 670 680 690 700
SAAAAAAAAA AAAGTPPPPP PPAGVCDILP ACQREGGPHC CSGRGNVRQR
710 720 730 740 750
WHTCPELHKA MDGVTYIADQ TRKEEESTRV KEDWKYVAMV LDRLFLWIFT
760 770 780 790
IAVVVGTAGI ILQAPTLYDT RMPIDIKLSE IASTTAKPNV ARPVL
Length:795
Mass (Da):87,921
Last modified:January 1, 1998 - 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:iDC753A5E71801EF8
GO

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
Y15593 mRNA Translation: CAA75688.1

<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
Y15593 mRNA Translation: CAA75688.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Organism-specific databases

FlyBaseiFBgn0015519, nAChRalpha3

Phylogenomic databases

HOGENOMiCLU_018074_1_1_1
OMAiHIDEIRG
PhylomeDBiO18394

Miscellaneous databases

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

More...
ChiTaRSi
nAChRalpha3, fly

Gene expression databases

BgeeiFBgn0015519, Expressed in brain and 16 other tissues
ExpressionAtlasiO18394, baseline and differential

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, 2 hits
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

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 nameiO18394_DROME
<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: O18394
<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/TrEMBL: January 1, 1998
Last sequence update: January 1, 1998
Last modified: June 2, 2021
This is version 153 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 statusiUnreviewed (UniProtKB/TrEMBL)
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