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@ARTICLE{Kaushik:638199,
author = {Kaushik, Vineeta and Gessa, Luca and Kumar, Nelam and
Pinkas, Matyáš and Czarnocki-Cieciura, Mariusz and
Palczewski, Krzysztof and Nováček, Jiří and Fernandes,
Humberto},
title = {{C}ryo{EM} structure and small-angle {X}-ray scattering
analyses of porcine retinol-binding protein 3},
journal = {Open biology},
volume = {15},
number = {1},
issn = {2046-2441},
address = {London},
publisher = {Royal Society Publishing},
reportid = {PUBDB-2025-04017},
pages = {240180},
year = {2025},
abstract = {The vertebrate visual cycle hinges on enzymatically
converting all-trans-retinol (at-ROL) into 11-cis-retinal
(11c-RAL), the chromophore that binds to opsins in
photoreceptors, forming light-responsive pigments. When
struck by a photon, these pigments activate the
phototransduction pathway and initiate the process of
vision. The enzymatic isomerization of at-ROL, crucial for
restoring the visual pigments and preparing them to receive
new light stimuli, relies on various enzymes found in both
the photoreceptors and retinal pigment epithelium cells. To
function effectively, retinoids must shuttle between these
two cell types. Retinol-binding protein 3 (RBP3), located in
the interphotoreceptor matrix, probably plays a pivotal role
in this transport mechanism. Comprised of four
retinoid-binding modules, RBP3 also binds fatty acids,
potentially aiding retinal function by facilitating the
loading and unloading of different retinoids at specific
cell types thereby directing the cycle. In this study, we
present a 3.67 Å cryoEM structure of porcine RBP3, along
with molecular docking analysis and corroborative
in-solution small-angle X-ray scattering data for titration
of RBP3 with relevant ligands, that also give insights on
RBP3 conformational adaptability.},
cin = {EMBL-User},
ddc = {570},
cid = {I:(DE-H253)EMBL-User-20120814},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P12-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1098/rsob.240180},
url = {https://bib-pubdb1.desy.de/record/638199},
}