Rhodopsin peptide

Specifications

Form

Lyophilized

Additional notes

Peptides are analyzed by Reverse-Phase HPLC (RP-HPLC) in order to determine purity. Identities are confirmed by MALDI-MS.

General info

Function

Photoreceptor required for image-forming vision at low light intensity (PubMed : 7846071, PubMed : 8107847). Required for photoreceptor cell viability after birth (PubMed : 12566452, PubMed : 2215617). Light-induced isomerization of the chromophore 11-cis-retinal to all-trans-retinal triggers a conformational change that activates signaling via G-proteins (PubMed : 26200343, PubMed : 28524165, PubMed : 28753425, PubMed : 8107847). Subsequent receptor phosphorylation mediates displacement of the bound G-protein alpha subunit by the arrestin SAG and terminates signaling (PubMed : 26200343, PubMed : 28524165).

Sequence similarities

Belongs to the G-protein coupled receptor 1 family. Opsin subfamily.

Post-translational modifications

Phosphorylated on some or all of the serine and threonine residues present in the C-terminal region (By similarity). After activation by light, phosphorylated by GRK1 (in vitro) (PubMed:28524165).. Contains one covalently linked retinal chromophore. Upon light absorption, the covalently bound 11-cis-retinal is converted to all-trans-retinal. After hydrolysis of the Schiff base and release of the covalently bound all-trans-retinal, active rhodopsin is regenerated by binding of a fresh molecule of 11-cis-retinal (PubMed:12566452).