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@ARTICLE{Mironova:59010,
author = {Mironova, O. S. and Budyak, I. L. and Büldt, G. and
Schlesinger, R. and Heberle, J.},
title = {{FT}-{IR} difference spectroscopy elucidates crucial
interactions of sensory rhodopsin {I} with the cognate
transducer {H}trl},
journal = {Biochemistry},
volume = {46},
issn = {0006-2960},
address = {Columbus, Ohio},
publisher = {American Chemical Society},
reportid = {PreJuSER-59010},
pages = {9399 - 9405},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {The phototaxis receptor sensory rhodopsin I (SRI) from
Halobacterium salinarum interacts with its cognate
transducer (HtrI) forming a transmembrane complex. After
light excitation of the chromophore all-trans retinal, SRI
undergoes structural changes that are ultimately transmitted
to HtrI. The interaction of SRI with HtrI results in the
closure of the receptor's proton pathway, which renders the
photocycle recovery kinetics of SRI pH-independent. We
demonstrate on heterologously expressed and reconstituted
SRI-HtrI fusion proteins that the transmembrane part of HtrI
(residues 1-52) as well as the downstream cytoplasmic part
(residues 53-147) exhibit conformational changes after light
excitation. The sum of these conformational changes is
similar to those observed in the fusion constructs SRI-HtrI
1-71 and SRI-HtrI 1-147, which display pH-independent
receptor kinetics. These results indicate the occurrence of
spatially distinct conformational changes that are required
for functional signal transmission. Kinetic and
spectroscopic analysis of HtrI point mutants of Asn53
provides evidence that this residue is involved in the
receptor-transducer interaction. We suggest that Asn53 plays
a role similar to that of Asn74 of the HtrII from
Natronobacterium pharaonis, the latter forming a hydrogen
bond to the receptor within the membrane.},
keywords = {Archaeal Proteins: chemistry / Archaeal Proteins: genetics
/ Archaeal Proteins: radiation effects / Asparagine:
chemistry / Asparagine: genetics / Halorhodopsins: chemistry
/ Halorhodopsins: genetics / Halorhodopsins: radiation
effects / Light / Membrane Proteins: chemistry / Membrane
Proteins: genetics / Membrane Proteins: radiation effects /
Point Mutation / Protein Interaction Mapping / Recombinant
Fusion Proteins: chemistry / Recombinant Fusion Proteins:
genetics / Recombinant Fusion Proteins: radiation effects /
Sensory Rhodopsins: chemistry / Sensory Rhodopsins: genetics
/ Sensory Rhodopsins: radiation effects / Spectroscopy,
Fourier Transform Infrared / Archaeal Proteins (NLM
Chemicals) / Halorhodopsins (NLM Chemicals) / Membrane
Proteins (NLM Chemicals) / Recombinant Fusion Proteins (NLM
Chemicals) / SRI protein, Halobacterium (NLM Chemicals) /
Sensory Rhodopsins (NLM Chemicals) / htrI protein,
Halobacterium salinarium (NLM Chemicals) / Asparagine (NLM
Chemicals) / J (WoSType)},
cin = {INB-2},
ddc = {570},
cid = {I:(DE-Juel1)VDB805},
pnm = {Funktion und Dysfunktion des Nervensystems},
pid = {G:(DE-Juel1)FUEK409},
shelfmark = {Biochemistry $\&$ Molecular Biology},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:17655327},
UT = {WOS:000248692400005},
doi = {10.1021/bi700563f},
url = {https://juser.fz-juelich.de/record/59010},
}