Metarhodopsin control by arrestin, light-filtering screening pigments, and visual pigment turnover in invertebrate microvillar photoreceptors
نویسندگان
چکیده
منابع مشابه
The role of the inositol phosphate cascade in visual excitation of invertebrate microvillar photoreceptors
The identity of the transmitter(s) involved in visual transduction in invertebrate microvillar photoreceptors remains unresolved. In this study, the role of inositol 1,4,5-trisphosphate (IP3) was examined in Limulus ventral photoreceptors by studying the effects on the light response of heparin and neomycin, agents that inhibit the production or action of IP3. Both heparin and neomycin reduce r...
متن کاملThe Role of Inositol Phosphate Cascade in Visual Excitation of Invertebrate Microvillar Photoreceptors
The identity of the transmitter(s) involved in visual transduction in invertebrate microvillar photoreceptors remains unresolved. In this study, the role of inositol 1,4,5-trisphosphate (IPs) was examined in Limulus ventral photoreceptors by studying the effects on the light response of heparin and neomycin, agents that inhibit the production or action of IP 3. Both heparin and neomycin reduce ...
متن کاملMechanism of arrestin 2 function in rhabdomeric photoreceptors.
Arrestins have emerged as one family of proteins that mediate the inactivation of G-protein-coupled receptors. We have isolated cDNA clones encoding two arrestin isoforms of the dipteran visual system, Calliphora arrestin 1 (Arr1) and arrestin 2 (Arr2). Microsequencing established that the arr2 gene encodes the Calliphora 49-kDa protein characterized previously as a photoreceptor-specific prote...
متن کاملArrestin in ciliary invertebrate photoreceptors: molecular identification and functional analysis in vivo.
Arrestin was identified in ciliary photoreceptors of Pecten irradians, and its role in terminating the light response was established electrophysiologically. Downstream effectors in these unusual visual cells diverge from both microvillar photoreceptors and rods and cones; the finding that key regulatory mechanisms of the early steps of visual excitation are conserved across such distant lineag...
متن کاملConditional inhibition of screening-pigment aggregation by lidocaine in crayfish photoreceptors and frog retinal pigment epithelium.
Lidocaine, at concentrations equal to or lower than those that inhibit fast axoplasmic transport, was found to interfere with the dark-adapting migration of the screening pigments along crayfish photoreceptors and within the cells of the frog retinal pigment epithelium (RPE). The effects of the anesthetic on pigment movements were studied in isolated eyes incubated under light or dark condition...
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ژورنال
عنوان ژورنال: Journal of Comparative Physiology A
سال: 2010
ISSN: 0340-7594,1432-1351
DOI: 10.1007/s00359-010-0604-7