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@ARTICLE{Poetsch:59160,
author = {Poetsch, A. and Berzborn, R. J. and Heberle, J. and Link,
T. A. and Dencher, N. A. and Seelert, H.},
title = {{B}iophysics and {B}ioinformatics {R}eveal {S}tructural
{D}ifferences of the {T}wo {P}eripheral {S}talk {S}ubunits
in {C}hloroplast {ATP} {S}ynthase},
journal = {Journal of biochemistry},
volume = {141},
issn = {0021-924x},
address = {Tokyo},
publisher = {Soc.},
reportid = {PreJuSER-59160},
pages = {411 - 420},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {ATP synthases convert an electrochemical proton gradient
into rotational movement to produce the ubiquitous energy
currency adenosine triphosphate. Tension generated by the
rotational torque is compensated by the stator. For this
task, a peripheral stalk flexibly fixes the hydrophilic
catalytic part F1 to the membrane integral proton conducting
part F(O) of the ATP synthase. While in eubacteria a
homodimer of b subunits forms the peripheral stalk, plant
chloroplasts and cyanobacteria possess a heterodimer of
subunits I and II. To better understand the functional and
structural consequences of this unique feature of
photosynthetic ATP synthases, a procedure was developed to
purify subunit I from spinach chloroplasts. The secondary
structure of subunit I, which is not homologous to bacterial
b subunits, was compared to heterologously expressed subunit
II using CD and FTIR spectroscopy. The content of
alpha-helix was determined by CD spectroscopy to $67\%$ for
subunit I and $41\%$ for subunit II. In addition,
bioinformatics was applied to predict the secondary
structure of the two subunits and the location of the
putative coiled-coil dimerization regions. Three helical
domains were predicted for subunit I and only two
uninterrupted domains for the shorter subunit II. The
predicted length of coiled-coil regions varied between
different species and between subunits I and II.},
keywords = {Amino Acid Sequence / Biophysical Phenomena / Biophysics /
Chloroplast Proton-Translocating ATPases: chemistry /
Computational Biology / Molecular Sequence Data / Protein
Structure, Secondary / Protein Subunits: chemistry /
Sequence Alignment / Spectroscopy, Fourier Transform
Infrared / Spinacia oleracea: enzymology / Protein Subunits
(NLM Chemicals) / Chloroplast Proton-Translocating ATPases
(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:17283010},
UT = {WOS:000245676800013},
doi = {10.1093/jb/mvm045},
url = {https://juser.fz-juelich.de/record/59160},
}