Vm. Petrov et al., RAS-LIKE PROTEINS OF INVERTEBRATE AND VER TEBRATE VISUAL SYSTEMS - INTERACTION OF EXOENZYME-C3 SUBSTRATES WITH PHOTOACTIVATED RHODOPSIN, Bioorganiceskaa himia, 20(5), 1994, pp. 498-505
Composition and cell localisation of ADP-ribosyltransferase C3 substra
tes were studied in squid photoreceptors and in bovine ROS. Polypeptid
es with M(r) 22, 24, 30, 45 and 80 kDa are ADP-ribosylated in squid ph
otoreceptor membranes, and polypeptides with M(r) 22, 24, and 60 kDa a
re ribosylated in cattle ROS membranes. Cytoplasmic fraction of ROS co
ntains C3 substrates with M(r) 22, 24, 28 and 36 kDa. Increase in ADP-
ribosylation of 22 and 24 kDa substrates and their interaction with ph
otoexcited rhodopsin in squid photoreceptors was found.