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Small GTP‐binding proteins of squid photoreceptor
Author(s) -
Petrov Vasily M.,
Artamonov Igor D.,
Lipkin Valery M.
Publication year - 1994
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(94)80207-6
Subject(s) - heterotrimeric g protein , rhodopsin , visual phototransduction , gtp' , transducin , g protein , gtp binding protein regulators , squid , biochemistry , microbiology and biotechnology , biology , chemistry , guanosine triphosphate , biophysics , signal transduction , retinal , enzyme , ecology
Squid photoreceptor membranes contain several small GTP‐binding proteins (22–27 kDa) in addition to heterotrimeric G‐proteins. In addition, these membranes contain several proteins which can be ADP‐ribosylated by exoenzyme C 3 from Clostridium botulinum (C 3 ). These proteins are similar but not identical to C 3 substrates from bovine rod outer segments. It is shown that substrates of C 3 in squid photoreceptor interact with rhodopsin in a light‐dependent manner. These data suggest involvement of small GTP‐binding proteins in phototransduction processes in invertebrates.