NMR paper 1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal prote

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[NMR paper] 1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal prote

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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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08-21-2010, 11:45 PM

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1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal prote

1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal protein G and comparison to the NMR structure of the B1 domain.

Related Articles 1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal protein G and comparison to the NMR structure of the B1 domain.

Biochemistry. 1992 Nov 3;31(43):10449-57

Authors: Achari A, Hale SP, Howard AJ, Clore GM, Gronenborn AM, Hardman KD, Whitlow M

The structure of the B2 immunoglobulin-binding domain of streptococcal protein G has been determined at 1.67-A resolution using a combination of single isomorphous replacement (SIR) phasing and manual fitting of the coordinates of the NMR structure of B1 domain of streptococcal protein G [Gronenborn, A. M., et al. (1991) Science 253, 657-661]. The final R value was 0.191 for data between 8.0 and 1.67 A. The structure described here has 13 residues preceding the 57-residue Ig-binding domain and 13 additional residues following it, for a total of 83 residues. The 57-residue binding domain is well-determined in the structure, having an average B factor of 18.0. Only residues 8-77 could be located in the electron density maps, with the ends of the structure fading into disorder. Like the B1 domain, the B2 domain consists of four beta-strands and a single helix lying diagonally across the beta-sheet, with a -1, +3 chi, -1 topology. This small structure is extensively hydrogen-bonded and has a relatively large hydrophobic core. These structural observations may account for the exceptional stability of protein G. A comparison of the B2 domain X-ray structure and the B1 domain NMR structure showed minor differences in the turn between strands and two and a slight displacement of the helix relative to the sheet. Hydrogen bonds between crystallographically related molecules account for most of these differences.

PMID: 1420164 [PubMed - indexed for MEDLINE]

Source: PubMed

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