% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@ARTICLE{Kang:30216,
author = {Kang, K. and Bauer, P. J. and Kinjo, T. G. and Szerencsei,
R. T. and Bönigk, W. and Winkfein, R. J. and Schnetkamp, P.
P. M.},
title = {{A}ssembly of retinal rod or cone
{N}a+/{C}a2+/{K}+-exchanger oligomers with c{GMP}-gated
channel subunits as probed with heterologously expressed
c{DNA}s},
journal = {Biochemistry},
volume = {42},
issn = {0006-2960},
address = {Columbus, Ohio},
publisher = {American Chemical Society},
reportid = {PreJuSER-30216},
pages = {4593 - 4600},
year = {2003},
note = {Record converted from VDB: 12.11.2012},
abstract = {Proper control of intracellular free Ca(2+) is thought to
involve subsets of proteins that co-localize to mediate
coordinated Ca(2+) entry and Ca(2+) extrusion. The outer
segments of vertebrate rod and cone photoreceptors present
one example: Ca(2+) influx is exclusively mediated via
cGMP-gated channels (CNG), whereas the Na(+)/Ca(2+)-K(+)
exchanger (NCKX) is the only Ca(2+) extrusion protein
present. In situ, a rod NCKX homodimer and a CNG
heterotetramer are thought to be part of a single protein
complex. However, NCKX-NCKX and NCKX-CNG interactions have
been described so far only in bovine rod outer segment
membranes. We have used thiol-specific cross-linking and
co-immunoprecipitation to examine NCKX self-assembly and
CNG-NCKX co-assembly after heterologous expression of either
the rod or cone NCKX/CNG isoforms. Co-immunoprecipitation
clearly demonstrated both NCKX homooligomerization and
interactions between NCKX and CNG. The NCKX-NCKX and
NCKX-CNG interactions were observed for both the rod and the
cone isoforms. Thiol-specific cross-linking led to rod NCKX1
dimers and to cone NCKX2 adducts of an apparent molecular
weight higher than that predicted for a NCKX2 dimer. The
mass of the cross-link product critically depended on the
location of the particular cysteine residue used by the
cross-linker, and we cannot exclude that NCKX forms a higher
oligomer. The NCKX-NCKX and NCKX-CNG interactions were not
isoform-specific (i.e., rod NCKX could interact with cone
NCKX, rod NCKX could interact with cone CNGA, and vice
versa). Deletion of the two large hydrophilic loops from the
NCKX protein did not abolish the NCKX oligomerization,
suggesting that it is mediated by the highly conserved
transmembrane spanning segments.},
keywords = {Animals / Calcium: metabolism / Cell Line / Chickens:
metabolism / Cyclic GMP: metabolism / Cyclic
Nucleotide-Gated Cation Channels / Humans / Insects / Ion
Channels: metabolism / Photoreceptor Cells, Vertebrate:
metabolism / Precipitin Tests / Sodium-Calcium Exchanger:
biosynthesis / Sodium-Calcium Exchanger: metabolism / Cyclic
Nucleotide-Gated Cation Channels (NLM Chemicals) / Ion
Channels (NLM Chemicals) / Sodium-Calcium Exchanger (NLM
Chemicals) / potassium-dependent sodium-calcium exchanger
(NLM Chemicals) / Calcium (NLM Chemicals) / Cyclic GMP (NLM
Chemicals) / J (WoSType)},
cin = {IBI-1},
ddc = {570},
cid = {I:(DE-Juel1)VDB57},
pnm = {Neurowissenschaften},
pid = {G:(DE-Juel1)FUEK255},
shelfmark = {Biochemistry $\&$ Molecular Biology},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:12693957},
UT = {WOS:000182420000031},
doi = {10.1021/bi027276z},
url = {https://juser.fz-juelich.de/record/30216},
}