title: The amino- and carboxyl-terminal sequence of bovine rhodopsin.
abstract: The amino terminus of bovine rhodopsin is blocked and has the sequence x-Met-Asn(CHO)-Gly-Thr-Glu-Gly-Pro-Asn-Phe-Tyr-Val-Pro-Phe-Ser-Asn(CHO)-Lys-Thr-Gly-Val-Val-Arg, where CHO represents sites of carbohydrate attachment. The carboxyl-terminal sequence of rhodopsin is Val-Ser-Lys-Thr-Glu-Thr-Ser-Gln-Val-Ala-Pro-Ala. Upon short-term digestion of rod outer segment (ROS) membranes with thermolysin, opsin (similar to 35,000 daltons) is converted to a membrane-bound fragment O' (similar to 30,500 daltons) and 2 peptides containing 12 amino acids are released from the carboxyl terminus of rhodopsin into the supernatant. Upon long-term digestion of ROS with thermolysin, opsin and O' are replaced by the membrane-bound fragments F1 (similar to 25,000 daltons), and F2 (similar 9,500 daltons). When 32P-ROS are digested, F2 carries the 32P. Both O' and F1 contain the amino-terminal glycopeptide.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002417:Cattle; D010446:Peptide Fragments / Q000032:analysis; D012168:Retinal Pigments; D012243:Rhodopsin; D013820:Thermolysin; D014357:Trypsin
chemical_list: D000596:Amino Acids; D010446:Peptide Fragments; D012168:Retinal Pigments; D012243:Rhodopsin; D014357:Trypsin; D013820:Thermolysin