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NMR processing:
MDD
NMR assignment:
Backbone:
Autoassign
MARS
UNIO Match
PINE
Side-chains:
UNIO ATNOS-Ascan
NOEs:
UNIO ATNOS-Candid
UNIO Candid
ASDP
Structure from NMR restraints:
Ab initio:
GeNMR
Cyana
XPLOR-NIH
ASDP
UNIO ATNOS-Candid
UNIO Candid
Fragment-based:
BMRB CS-Rosetta
Rosetta-NMR (Robetta)
Template-based:
GeNMR
I-TASSER
Refinement:
Amber
Structure from chemical shifts:
Fragment-based:
WeNMR CS-Rosetta
BMRB CS-Rosetta
Homology-based:
CS23D
Simshift
Torsion angles from chemical shifts:
Preditor
TALOS
Promega- Proline
Secondary structure from chemical shifts:
CSI (via RCI server)
TALOS
MICS caps, β-turns
d2D
PECAN
Flexibility from chemical shifts:
RCI
Interactions from chemical shifts:
HADDOCK
Chemical shifts re-referencing:
Shiftcor
UNIO Shiftinspector
LACS
CheckShift
RefDB
NMR model quality:
NOEs, other restraints:
PROSESS
PSVS
RPF scores
iCing
Chemical shifts:
PROSESS
CheShift2
Vasco
iCing
RDCs:
DC
Anisofit
Pseudocontact shifts:
Anisofit
Protein geomtery:
Resolution-by-Proxy
PROSESS
What-If
iCing
PSVS
MolProbity
SAVES2 or SAVES4
Vadar
Prosa
ProQ
MetaMQAPII
PSQS
Eval123D
STAN
Ramachandran Plot
Rampage
ERRAT
Verify_3D
Harmony
Quality Control Check
NMR spectrum prediction:
FANDAS
MestReS
V-NMR
Flexibility from structure:
Backbone S2
Methyl S2
B-factor
Molecular dynamics:
Gromacs
Amber
Antechamber
Chemical shifts prediction:
From structure:
Shiftx2
Sparta+
Camshift
CH3shift- Methyl
ArShift- Aromatic
ShiftS
Proshift
PPM
CheShift-2- Cα
From sequence:
Shifty
Camcoil
Poulsen_rc_CS
Disordered proteins:
MAXOCC
Format conversion & validation:
CCPN
From NMR-STAR 3.1
Validate NMR-STAR 3.1
NMR sample preparation:
Protein disorder:
DisMeta
Protein solubility:
camLILA
ccSOL
Camfold
camGroEL
Zyggregator
Isotope labeling:
UPLABEL
Solid-state NMR:
sedNMR


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Old 08-21-2010, 11:45 PM
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Default Interactions of phospholipids with the mitochondrial cytochrome-c reductase studied b

Interactions of phospholipids with the mitochondrial cytochrome-c reductase studied by spin-label ESR and NMR spectroscopy.

Related Articles Interactions of phospholipids with the mitochondrial cytochrome-c reductase studied by spin-label ESR and NMR spectroscopy.

Eur J Biochem. 1992 Oct 1;209(1):423-30

Authors: Hayer-Hartl M, Schägger H, von Jagow G, Beyer K

Protein/phospholipid interactions in the solubilized mitochondrial ubihydroquinone:cytochrome-c oxidoreductase (bc1 complex) were studied by spin-label electron-spin resonance and by 31P-NMR spectroscopy. Spin-labelled phospholipids were employed to probe the relative binding affinities of a number of phospholipids with regard to the significance of phospholipids for the activity and stability of this multisubunit complex. The protein was titrated with spin-labelled cardiolipin (1,3-bisphosphatidyl-sn-glycerol) and with the spin-labelled analogues of PtdCho and PtdEtn, both of which have been shown recently to elicit a substantial increase in electron-transport activity [Schägger, H., Hagen, T., Roth, B., Brandt, U., Link, T. A. & von Jagow, G. (1990) Eur. J. Biochem. 190, 123-130]. A simplified distribution model showed that neutral phospholipids have much lower protein affinity than cardiolipin. In contrast to the transient weak lipid binding detected by spin-label electron-spin resonance, 31P NMR revealed a tightly bound cardiolipin portion, even after careful delipidation of the complex. Considerable line narrowing was observed after phospholipase A2 digestion of the bound cardiolipin, whereas addition of SDS resulted in complete release. Relative proportions and line widths of mobile and immobilized lipids were obtained by deconvoluting the partially overlapping signals. The current results are discussed with reference to similar findings with other mitochondrial membrane proteins. It is assumed that activation by neutral phospholipids reflects a generalized effect on the protein conformation. Cardiolipin binding is believed to be important for the structural integrity of the mitochondrial protein complexes.

PMID: 1327777 [PubMed - indexed for MEDLINE]



Source: PubMed
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