TY  - JOUR
AU  - Gogonea, V.
AU  - Wu, Z.
AU  - Lee, X.
AU  - Pipich, V.
AU  - Li, X.-M.
AU  - Ioffe, A.
AU  - DiDonato, J.A.
AU  - Hazen, S.L.
TI  - Congruency between biophysical data from multiple platforms and molecular dynamics simulation of the double super helix model of nascent high-density lipoprotein
JO  - Biochemistry
VL  - 49
SN  - 0006-2960
CY  - Columbus, Ohio
PB  - American Chemical Society
M1  - PreJuSER-14185
SP  - 7323 - 7343
PY  - 2010
N1  - This study was supported by National Institutes of Health Grants P01 HL098055, P01 HL076491-055328, P01 HL087018-02001 and R01 DK 080732-01.
AB  - The predicted structure and molecular trajectories from >80 ns molecular dynamics simulation of the solvated Double-Super Helix (DSH) model of nascent high-density lipoprotein (HDL) were determined and compared with experimental data on reconstituted nascent HDL obtained from multiple biophysical platforms, including small angle neutron scattering (SANS) with contrast variation, hydrogen-deuterium exchange tandem mass spectrometry (H/D-MS/MS), nuclear magnetic resonance spectroscopy (NMR), cross-linking tandem mass spectrometry (MS/MS), fluorescence resonance energy transfer (FRET), electron spin resonance spectroscopy (ESR), and electron microscopy. In general, biophysical constraints experimentally derived from the multiple platforms agree with the same quantities evaluated using the simulation trajectory. Notably, key structural features postulated for the recent DSH model of nascent HDL are retained during the simulation, including (1) the superhelical conformation of the antiparallel apolipoprotein A1 (apoA1) chains, (2) the lipid micellar-pseudolamellar organization, and (3) the solvent-exposed Solar Flare loops, proposed sites of interaction with LCAT (lecithin cholesteryl acyltransferase). Analysis of salt bridge persistence during simulation provides insights into structural features of apoA1 that forms the backbone of the lipoprotein. The combination of molecular dynamics simulation and experimental data from a broad range of biophysical platforms serves as a powerful approach to studying large macromolecular assemblies such as lipoproteins. This application to nascent HDL validates the DSH model proposed earlier and suggests new structural details of nascent HDL.
KW  - Apolipoprotein A-I: chemistry
KW  - Biophysics
KW  - Deuterium
KW  - Hydrogen
KW  - Lipids
KW  - Lipoproteins: chemistry
KW  - Lipoproteins, HDL: chemistry
KW  - Macromolecular Substances
KW  - Magnetic Resonance Spectroscopy
KW  - Molecular Dynamics Simulation
KW  - Phosphatidylcholine-Sterol O-Acyltransferase
KW  - Protein Structure, Secondary
KW  - Apolipoprotein A-I (NLM Chemicals)
KW  - Lipids (NLM Chemicals)
KW  - Lipoproteins (NLM Chemicals)
KW  - Lipoproteins, HDL (NLM Chemicals)
KW  - Macromolecular Substances (NLM Chemicals)
KW  - Hydrogen (NLM Chemicals)
KW  - Deuterium (NLM Chemicals)
KW  - Phosphatidylcholine-Sterol O-Acyltransferase (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:20687589
C2  - pmc:PMC2940317
UR  - <Go to ISI:>//WOS:000281052600010
DO  - DOI:10.1021/bi100588a
UR  - https://juser.fz-juelich.de/record/14185
ER  -