NMR paper Localisation of methionine residues in bacteriorhodopsin by carbonyl 13C-NMR with seq

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[NMR paper] Localisation of methionine residues in bacteriorhodopsin by carbonyl 13C-NMR with seq

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NMR processing:

MDD

NMR assignment:

Backbone:

Side-chains:

NOEs:

Structure from NMR restraints:

Ab initio:

Fragment-based:

Rosetta-NMR (Robetta)

Template-based:

GeNMR

I-TASSER

Refinement:

Amber

Structure from chemical shifts:

Fragment-based:

Homology-based:

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:

NMR model quality:

NOEs, other restraints:

Chemical shifts:

RDCs:

Pseudocontact shifts:

Protein geomtery:

SAVES2 or SAVES4

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:

Isotope labeling:

Solid-state NMR:

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08-22-2010, 03:01 AM

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Localisation of methionine residues in bacteriorhodopsin by carbonyl 13C-NMR with seq

Localisation of methionine residues in bacteriorhodopsin by carbonyl 13C-NMR with sequence-specific assignments.

Related Articles Localisation of methionine residues in bacteriorhodopsin by carbonyl 13C-NMR with sequence-specific assignments.

FEBS Lett. 1993 Jul 19;327(1):7-12

Authors: Seigneuret M, Kainosho M

High-resolution 13C-NMR experiments have been performed on bacteriorhodopsin biosynthetically labeled with carbonyl-13C amino acids and solubilized in the detergent dodecylmaltoside. 13C-NMR spectra showing good resolution were obtained in the case of labeled amino acids moderately represented in the BR sequence. For BR labeled with [13C]carbonyl methionine, several sequence-specific assignment could be performed by co-labeling with 15N amino acids or proteolysis. These assignments were used to obtain structural data on BR. Water-exposure of methionine side chains in the protein was assessed by studying, using NMR, their oxidation by hydrogen peroxide. Local secondary structure at the level of methionine residues was monitored through the effect of 1H-2H exchange on NMR spectra. It was concluded that Met32, Met68 and Met163 are peripheral while all 6 other methionine residues are deeply embedded within hydrophobic alpha-helices. These results confirm the current model of the BR folding and secondary structure.

PMID: 8335098 [PubMed - indexed for MEDLINE]

Source: PubMed

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