RGD Reference Report - Addition of the chromophore to rat rhodopsin is an early post-translational event. - Rat Genome Database

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Addition of the chromophore to rat rhodopsin is an early post-translational event.

Authors: St Jules, RS  Wallingford, JC  Smith, SB  O'Brien, PJ 
Citation: St Jules RS, etal., Exp Eye Res. 1989 May;48(5):653-65.
RGD ID: 6893558
Pubmed: PMID:2525480   (View Abstract at PubMed)

Rat retinas were labeled either by intravitreal injection of [14C]leucine or by incubation with [3H]-leucine or [35S]-methionine. Subcellular fractions were prepared on linear sucrose gradients and rhodopsin was extracted with detergent and purified by chromatography on ConA-Sepharose. A fraction enriched in rough endoplasmic reticulum (RER) and substantially free of rod outer segments (ROS) was found to contain a light-sensitive protein exhibiting the properties of rhodopsin on ConA-Sepharose or Agarose chromatography and on SDS-polyacrylamide gel electrophoresis, as well as immunologically. Intravitreal injection of [3H]-retinol also labeled the rhodopsin in the RER under conditions in which the rhodopsin in the ROS was not heavily labeled. Thus the chromophore appears to be attached to opsin shortly after the apoprotein is translated in the RER.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
red, far-red light phototransduction  IDA 6893558 RGD 

Cellular Component
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
rough endoplasmic reticulum membrane  IDA 6893558 RGD 

Molecular Function
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
retinal binding  IDA 68935589-cis retinaldehydeRGD 

Objects Annotated

Genes (Rattus norvegicus)
Rho  (rhodopsin)

Additional Information