Reviewed, UniProtKB/Swiss-Prot P47870 (GBRB2_HUMAN)

Names and origin

Protein names

Recommended name:
    Gamma-aminobutyric acid receptor subunit beta-2
Alternative name(s):
    GABA(A) receptor subunit beta-2

Gene names

Name:

GABRB2

Organism

Homo sapiens (Human) [Complete proteome]

Taxonomic identifier

9606 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo

Protein attributes

Sequence length	474 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel.
Subunit structure	Generally pentameric. There are five types of GABA(A) receptor chains: alpha, beta, gamma, delta, and rho. Binds UBQLN1.
Subcellular location	Cell junction › synapse › postsynaptic cell membrane; Multi-pass membrane protein. Cell membrane; Multi-pass membrane protein.
Sequence similarities	Belongs to the ligand-gated ionic channel (TC 1.A.9) family. [View classification]

Ontologies

Keywords
Biological process	Ion transport Transport
Cellular component	Cell junction Cell membrane Membrane Postsynaptic cell membrane Synapse
Coding sequence diversity	Alternative splicing
Domain	Signal Transmembrane
Ligand	Chloride
Molecular function	Chloride channel Ionic channel
PTM	Disulfide bond Glycoprotein Isopeptide bond Phosphoprotein Ubl conjugation
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	gamma-aminobutyric acid signaling pathway Ref.1 Traceable author statement. Source: ProtInc ion transport Inferred from electronic annotation. Source: UniProtKB-KW synaptic transmission Ref.1 Traceable author statement. Source: ProtInc
Cellular component	cell junction Inferred from electronic annotation. Source: UniProtKB-SubCell integral to plasma membrane Ref.1 Traceable author statement. Source: ProtInc postsynaptic membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	GABA-A receptor activity Ref.1 Traceable author statement. Source: ProtInc chloride channel activity Inferred from electronic annotation. Source: UniProtKB-KW chloride ion binding Inferred from electronic annotation. Source: UniProtKB-KW extracellular ligand-gated ion channel activity Inferred from electronic annotation. Source: InterPro neurotransmitter receptor activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Alternative products

This entry describes 2 isoforms produced by alternative splicing. [Align] [Select]

Isoform Short (identifier: P47870-1)

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

Isoform Long (identifier: P47870-2)

The sequence of this isoform differs from the canonical sequence as follows:
     359-359: K → KIFYKDIKQNGTQYRSLWDPTGNLSPTRRTTNYDFSLYT

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Signal peptide	1 – 25	25	By similarity
	Chain	26 – 474	449	Gamma-aminobutyric acid receptor subunit beta-2		PRO_0000000459
Regions
	Topological domain	26 – 244	219	Extracellular Probable
	Transmembrane	245 – 266	22	Probable
	Transmembrane	270 – 292	23	Probable
	Transmembrane	304 – 326	23	Probable
	Topological domain	327 – 451	125	Cytoplasmic Probable
	Transmembrane	452 – 473	22	Probable
Amino acid modifications
	Modified residue	396	1	Phosphotyrosine By similarity
	Modified residue	403	1	Phosphotyrosine By similarity
	Glycosylation	32	1	N-linked (GlcNAc...) Potential
	Glycosylation	104	1	N-linked (GlcNAc...) Potential
	Glycosylation	173	1	N-linked (GlcNAc...) Potential
	Disulfide bond	160 ↔ 174		By similarity
	Cross-link	45		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.4
Natural variations
	Alternative sequence	359	1	K → KIFYKDIKQNGTQYRSLWDP TGNLSPTRRTTNYDFSLYT in isoform Long.		VSP_000087

Sequences

	Sequence		Length	Mass (Da)
	Isoform Short [UniParc]. Last modified February 1, 1996. Version 1. Checksum: 1390A982EB616332	FASTA	474	54,606
	10 20 30 40 50 60 MWRVRKRGYF GIWSFPLIIA AVCAQSVNDP SNMSLVKETV DRLLKGYDIR LRPDFGGPPV 70 80 90 100 110 120 AVGMNIDIAS IDMVSEVNMD YTLTMYFQQA WRDKRLSYNV IPLNLTLDNR VADQLWVPDT 130 140 150 160 170 180 YFLNDKKSFV HGVTVKNRMI RLHPDGTVLY GLRITTTAAC MMDLRRYPLD EQNCTLEIES 190 200 210 220 230 240 YGYTTDDIEF YWRGDDNAVT GVTKIELPQF SIVDYKLITK KVVFSTGSYP RLSLSFKLKR 250 260 270 280 290 300 NIGYFILQTY MPSILITILS WVSFWINYDA SAARVALGIT TVLTMTTINT HLRETLPKIP 310 320 330 340 350 360 YVKAIDMYLM GCFVFVFMAL LEYALVNYIF FGRGPQRQKK AAEKAASANN EKMRLDVNKM 370 380 390 400 410 420 DPHENILLST LEIKNEMATS EAVMGLGDPR STMLAYDASS IQYRKAGLPR HSFGRNALER 430 440 450 460 470 HVAQKKSRLR RRASQLKITI PDLTDVNAID RWSRIFFPVV FSFFNIVYWL YYVN
	Isoform Long. Checksum: C390A0C92815DD89	FASTA	512	59,150
	10 20 30 40 50 60 MWRVRKRGYF GIWSFPLIIA AVCAQSVNDP SNMSLVKETV DRLLKGYDIR LRPDFGGPPV 70 80 90 100 110 120 AVGMNIDIAS IDMVSEVNMD YTLTMYFQQA WRDKRLSYNV IPLNLTLDNR VADQLWVPDT 130 140 150 160 170 180 YFLNDKKSFV HGVTVKNRMI RLHPDGTVLY GLRITTTAAC MMDLRRYPLD EQNCTLEIES 190 200 210 220 230 240 YGYTTDDIEF YWRGDDNAVT GVTKIELPQF SIVDYKLITK KVVFSTGSYP RLSLSFKLKR 250 260 270 280 290 300 NIGYFILQTY MPSILITILS WVSFWINYDA SAARVALGIT TVLTMTTINT HLRETLPKIP 310 320 330 340 350 360 YVKAIDMYLM GCFVFVFMAL LEYALVNYIF FGRGPQRQKK AAEKAASANN EKMRLDVNKI 370 380 390 400 410 420 FYKDIKQNGT QYRSLWDPTG NLSPTRRTTN YDFSLYTMDP HENILLSTLE IKNEMATSEA 430 440 450 460 470 480 VMGLGDPRST MLAYDASSIQ YRKAGLPRHS FGRNALERHV AQKKSRLRRR ASQLKITIPD 490 500 510 LTDVNAIDRW SRIFFPVVFS FFNIVYWLYY VN

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Role of the beta subunit in determining the pharmacology of human gamma-aminobutyric acid type A receptors." Hadingham K.L., Wingrove P.B., Wafford K.A., Bain C., Kemp J.A., Palmer K.J., Wilson A.W., Wilcox A.S., Sikela J.M., Ragan C.I. Mol. Pharmacol. 44:1211-1218(1993) [PubMed: 8264558] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM SHORT). Tissue: Brain.
[2]	"Cloning, sequence analysis and expression of two forms of mRNA coding for the human beta 2 subunit of the GABAA receptor." McKinley D.D., Lennon D.J., Carter D.B. Brain Res. Mol. Brain Res. 28:175-179(1995) [PubMed: 7707873] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS LONG AND SHORT). Tissue: Brain.
[3]	"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM SHORT).
[4]	"Tryptic digestion of ubiquitin standards reveals an improved strategy for identifying ubiquitinated proteins by mass spectrometry." Denis N.J., Vasilescu J., Lambert J.-P., Smith J.C., Figeys D. Proteomics 7:868-874(2007) [PubMed: 17370265] [Abstract] Cited for: UBIQUITINATION [LARGE SCALE ANALYSIS] AT LYS-45, MASS SPECTROMETRY.
+	Additional computationally mapped references.

Web resources

Protein Spotlight

Forbidden fruit - Issue 56 of March 2005

Cross-references

Sequence databases
EMBLGenBankDDBJ	S67368 mRNA. Translation: AAB29370.1. S77554 mRNA. Translation: AAB33983.1. S77553 mRNA. Translation: AAB33982.1. BC099705 mRNA. Translation: AAH99705.1. BC099719 mRNA. Translation: AAH99719.1. BC105639 mRNA. Translation: AAI05640.1.
IPI	IPI00026639. IPI00216394.
PIR	I52656.
RefSeq	NP_000804.1. NP_068711.1.
UniGene	Hs.303527
3D structure databases
ModBase	Search...
Protein family/group databases
TCDB	1.A.9.5.2. neurotransmitter receptor, cys loop, ligand-gated ion channel (LIC) family.
PTM databases
PhosphoSite	P47870.
Proteomic databases
PeptideAtlas	P47870.
PRIDE	P47870.
Genome annotation databases
Ensembl	ENSG00000145864. Homo sapiens. [Contig view]
GeneID	2561.
KEGG	hsa:2561.
UCSC	uc003lyr.1. human. uc003lys.1. human.
Organism-specific databases
GeneCards	GC05M160653.
H-InvDB	HIX0032109.
HGNC	HGNC:4082. GABRB2.
HPA	CAB001964.
MIM	600232. gene.
PharmGKB	PA28496.
GenAtlas	Search...
Phylogenomic databases
HOVERGEN	P47870.
OMA	P47870. LNDPRNT.
Gene expression databases
ArrayExpress	P47870.
Bgee	P47870.
CleanEx	HS_GABRB2.
GermOnline	ENSG00000145864. Homo sapiens.
Family and domain databases
InterPro	IPR006028. GABAA_rcpt. IPR002289. GABAAb_rcpt. IPR006029. Neu_channel_TM. IPR006202. Neur_chan_lig_bd. IPR006201. Neur_channel. IPR018000. Neurotransmitter_ion_chnl_CS. [Graphical view]
Gene3D	G3DSA:2.70.170.10. Neur_chan_lig_bd. 1 hit.
PANTHER	PTHR18945. Neur_channel. 1 hit.
Pfam	PF02931. Neur_chan_LBD. 1 hit. PF02932. Neur_chan_memb. 1 hit. [Graphical view]
PRINTS	PR01160. GABAARBETA. PR00253. GABAARECEPTR. PR00252. NRIONCHANNEL.
TIGRFAMs	TIGR00860. LIC. 1 hit.
PROSITE	PS00236. NEUROTR_ION_CHANNEL. 1 hit. [Graphical view]
ProtoNet	Search...
Other Resources
DrugBank	DB00189. Ethchlorvynol. DB00690. Flurazepam. DB00186. Lorazepam. DB00683. Midazolam.
NextBio	10115.
SOURCE	Search...

Entry information

Entry name

GBRB2_HUMAN

Accession

Primary (citable) accession number: P47870
Secondary accession number(s): Q16323, Q4FZB2

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 1, 1996
Last sequence update:	February 1, 1996
Last modified:	July 7, 2009
This is version 86 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)