Abstract:
:Cone photoreceptor subtypes having different spectral sensitivities exhibit different recovery kinetics in their photoresponses in some vertebrates. Phosphorylation by G protein-coupled receptor kinase (GRK) is essential for the rapid inactivation of light-activated visual pigment, which is the rate-limiting step of the cone photoresponse recovery in salamander. In this study we compared the rate of light-dependent phosphorylation by GRK7 of carp green- and blue-sensitive cone visual pigments. Blue pigment was phosphorylated significantly less effectively than green pigment, suggesting that the difference in the pigment phosphorylation rate is responsible for the difference in photoresponse kinetics among cone photoreceptor subtypes.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Tsutsui K,Tachibanaki S,Shimauchi-Matsukawa Y,Shichida Y,Kawamura Sdoi
10.1016/j.bbrc.2013.09.118subject
Has Abstractpub_date
2013-11-01 00:00:00pages
630-4issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(13)01623-9journal_volume
440pub_type
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