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Guanine nucleotide binding protein (G protein), alpha transducing activity polypeptide 2
Symbols GNAT2 ; ACHM4; GNATC
External IDs OMIM139340 MGI95779 HomoloGene21092 GeneCards: GNAT2 Gene
RNA expression pattern
PBB GE GNAT2 210604 at tn.png
More reference expression data
Species Human Mouse
Entrez 2780 14686
Ensembl ENSG00000134183 ENSMUSG00000009108
UniProt P19087 P50149
RefSeq (mRNA) NM_005272 NM_008141
RefSeq (protein) NP_005263 NP_032167
Location (UCSC) Chr 1:
110.15 – 110.16 Mb
Chr 3:
108.09 – 108.1 Mb
PubMed search [1] [2]

Guanine nucleotide-binding protein G(t) subunit alpha-2 is a protein that in humans is encoded by the GNAT2 gene.[1][2]


Transducin is a 3-subunit guanine nucleotide-binding protein (G protein) which stimulates the coupling of rhodopsin and cGMP-phoshodiesterase during visual impulses. The transducin alpha subunits in rods and cones are encoded by separate genes. This gene encodes the alpha subunit in cones.[2]


  1. ^ Morris TA, Fong SL (Oct 1993). "Characterization of the gene encoding human cone transducin alpha-subunit (GNAT2)". Genomics 17 (2): 442–8. doi:10.1006/geno.1993.1345. PMID 8406495. 
  2. ^ a b "Entrez Gene: GNAT2 guanine nucleotide binding protein (G protein), alpha transducing activity polypeptide 2". 

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