Macromolecule Content

• Total Structure Weight: 6201.78 
• Atom Count: 436 
• Residue Count: 56 
• Unique protein chains: 1

1GB1

A NOVEL, HIGHLY STABLE FOLD OF THE IMMUNOGLOBULIN BINDING DOMAIN OF STREPTOCOCCAL PROTEIN G

• DOI: 10.2210/pdb1GB1/pdb

• Classification: IMMUNOGLOBULIN BINDING PROTEIN
• Organism(s): Streptococcus sp. group G


• Deposited: 1991-05-15 Released: 1993-04-15 
• Deposition Author(s): Gronenborn, A.M., Clore, G.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 60 

Literature

A novel, highly stable fold of the immunoglobulin binding domain of streptococcal protein G.

Gronenborn, A.M., Filpula, D.R., Essig, N.Z., Achari, A., Whitlow, M., Wingfield, P.T., Clore, G.M.

(1991) Science 253: 657-661

• PubMed: 1871600 
• Primary Citation of Related Structures:  
  2GB1
• Also Cited By: 3GB1


• PubMed Abstract: 
  

The high-resolution three-dimensional structure of a single immunoglobulin binding domain (B1, which comprises 56 residues including the NH2-terminal Met) of protein G from group G Streptococcus has been determined in solution by nuclear magnetic resonance spectroscopy on the basis of 1058 experimental restraints. The average atomic root-mean-square distribution about the mean coordinate positions is 0.27 angstrom (A) for the backbone atoms, 0.65 A for all atoms, and 0.39 A for atoms excluding disordered surface side chains. The structure has no disulfide bridges and is composed of a four-stranded beta sheet, on top of which lies a long helix. The central two strands (beta 1 and beta 4), comprising the NH2- and COOH-termini, are parallel, and the outer two strands (beta 2 and beta 3) are connected by the helix in a +3x crossover. This novel topology (-1, +3x, -1), coupled with an extensive hydrogen-bonding network and a tightly packed and buried hydrophobic core, is probably responsible for the extreme thermal stability of this small domain (reversible melting at 87 degrees C).

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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROTEIN G	A	56	Streptococcus sp. group G	Mutation(s): 0  Gene Names: spg
Find proteins for P06654 (Streptococcus sp. group G) Go to UniProtKB:  P06654

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 60 
• Olderado: 1GB1 Olderado

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1991-05-15 
• Released Date: 1993-04-15 
• Deposition Author(s): Gronenborn, A.M., Clore, G.M.

Revision History 

• Version 1.0: 1993-04-15
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance