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@ARTICLE{Deng:133926,
author = {Deng, X. and Morris, J. and Chaton, C. and Schröder,
Gunnar and Davidson, W. S. and Thompson, T. B.},
title = {{S}mall-angle {X}-ray {S}cattering of {A}polipoprotein
{A}-{IV} {R}eveals the {I}mportance of {I}ts {T}ermini for
{S}tructural {S}tability},
journal = {The journal of biological chemistry},
volume = {288},
number = {7},
address = {Bethesda, Md.},
publisher = {Soc.},
reportid = {FZJ-2013-02312},
pages = {4854 - 4866},
year = {2013},
abstract = {ApoA-IV is an amphipathic protein that can emulsify lipids
and has been linked to protective roles against
cardiovascular disease and obesity. We previously reported
an x-ray crystal structure of apoA-IV that was truncated at
its N and C termini. Here, we have extended this work by
demonstrating that self-associated states of apoA-IV are
stable and can be structurally studied using small-angle
x-ray scattering. Both the full-length monomeric and dimeric
forms of apoA-IV were examined, with the dimer showing an
elongated rod core with two nodes at opposing ends. The
monomer is roughly half the length of the dimer with a
single node. Small-angle x-ray scattering visualization of
several deletion mutants revealed that removal of both
termini can have substantial conformational effects
throughout the molecule. Additionally, the F334A point
mutation, which we previously showed increases apoA-IV lipid
binding, also exhibited large conformational effects on the
entire dimer. Merging this study's low-resolution structural
information with the crystal structure provides insight on
the conformation of apoA-IV as a monomer and as a dimer and
further defines that a clasp mechanism may control lipid
binding and, ultimately, protein function.},
cin = {ICS-6},
ddc = {570},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {452 - Structural Biology (POF2-452)},
pid = {G:(DE-HGF)POF2-452},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000315340400034},
doi = {10.1074/jbc.M112.436709},
url = {https://juser.fz-juelich.de/record/133926},
}