Phototransduction in Drosophila.

Abstract:

:Phototransduction in Drosophila's microvillar photoreceptors is mediated by phospholipase C (PLC) resulting in activation of two distinct Ca(2+)-permeable channels, TRP and TRPL. Here we review recent evidence on the unresolved mechanism of their activation, including the hypothesis that the channels are mechanically activated by physical effects of PIP2 depletion on the membrane, in combination with protons released by PLC. We also review molecularly explicit models indicating how Ca(2+)-dependent positive and negative feedback along with the ultracompartmentalization provided by the microvillar design can account for the ability of fly photoreceptors to respond to single photons 10-100× more rapidly than vertebrate rods, yet still signal under full sunlight.

journal_name

Curr Opin Neurobiol

authors

Hardie RC,Juusola M

doi

10.1016/j.conb.2015.01.008

subject

Has Abstract

pub_date

2015-10-01 00:00:00

pages

37-45

eissn

0959-4388

issn

1873-6882

pii

S0959-4388(15)00017-3

journal_volume

34

pub_type

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