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- Table of Contents
Facts about Guanine nucleotide-binding protein G(t) subunit alpha-1.
Guanine nucleotide-binding proteins (G proteins) function as transducers downstream of G protein-coupled receptors (GPCRs), such as the photoreceptor RHO. The alpha chain contains the guanine nucleotide binding site and alternates between an energetic, GTP-bound state and an inactive, GDP-bound state.
Human | |
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Gene Name: | GNAT1 |
Uniprot: | P11488 |
Entrez: | 2779 |
Belongs to: |
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G-alpha family |
CSNBAD3; GBT1; GNATR; guanine nucleotide binding protein (G protein), alpha transducing activitypolypeptide 1; guanine nucleotide-binding protein G(t) subunit alpha-1; guanine nucleotide-binding protein G(T), alpha-1 subunit; rod-type transducin alpha subunit; Transducin alpha-1 chain; transducin, rod-specific
Mass (kDA):
40.041 kDA
Human | |
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Location: | 3p21.31 |
Sequence: | 3; NC_000003.12 (50191610..50197696) |
Rod photoreceptor cells (PubMed:1614872). Predominantly expressed in the retina followed by the ciliary body, iris and retinal pigment epithelium (PubMed:22190596).
Cell projection, cilium, photoreceptor outer segment. Membrane; Peripheral membrane protein. Photoreceptor inner segment. Localizes mainly in the outer segment in the dark-adapted state, whereas is translocated to the inner part of the photoreceptors in the light-adapted state. During dark-adapted conditions, in the presence of UNC119 mislocalizes from the outer segment to the inner part of rod photoreceptors which leads to decreased photoreceptor damage caused by light.
PMID: 1614872 by Fong S.-L.; Characterization of the human rod transducin alpha-subunit gene.
PMID: 2534964 by Lerea C.L., et al. Alpha transducin is present in blue-, green-, and red-sensitive cone photoreceptors in the human retina.