Skip to content
GenoLensGenoLens

GNAT1

Chr 3p21.31

G protein subunit alpha transducin 1

Aliases:
CSNBAD3
MANE:
ENST00000232461.8

Annotations refreshed 9 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Retinal disorders

    BOTH monoallelic and biallelic, autosomal or pseudoautosomal
  • Glaucoma (developmental)

  • Structural eye disease

    BIALLELIC, autosomal or pseudoautosomal

Disease associations (Open Targets)

  • congenital stationary night blindness autosomal dominant 3

    0.64
  • congenital stationary night blindness

    0.60
  • congenital stationary night blindness 1G

    0.51
  • inherited retinal dystrophy

    0.46
  • retinitis pigmentosa

    0.46
  • Cone rod dystrophy

    0.39
  • cone-rod dystrophy

    0.39
  • Rod-cone dystrophy

    0.39
  • retinal degeneration

    0.38
  • Retinal dystrophy

    0.37

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Guanine nucleotide-binding protein G(t) subunit alpha-1

Alpha subunit of the heterotrimeric guanine nucleotide-binding protein (G protein) that transduces signals from the G protein-coupled photoreceptor rhodopsin (RHO). Required for normal RHO-mediated light perception in retinal rod photoreceptors (PubMed:22190596). Functions as a GTPase that contains the guanine nucleotide binding site and cycles between an active GTP-bound state and an inactive GDP-bound state. Under dim light conditions, RHO promotes GDP release and GTP binding. Activates downstream effectors, including cone cGMP-phosphodiesterase (PDE6), to mediate the phototransduction cascade (By similarity). Stimulates PDE6 by binding and repositioning the PDE6 gamma inhibitory subunits (PDE6G) to promote catalytic activity (By similarity)

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.