1BTB

THREE-DIMENSIONAL SOLUTION STRUCTURE AND 13C ASSIGNMENTS OF BARSTAR USING NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 30 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional solution structure and 13C assignments of barstar using nuclear magnetic resonance spectroscopy.

Lubienski, M.J.Bycroft, M.Freund, S.M.Fersht, A.R.

(1994) Biochemistry 33: 8866-8877

  • Primary Citation of Related Structures:  1BTA

  • PubMed Abstract: 
  • We present the high-resolution solution structure and 13C assignments of wild-type barstar, an 89 amino acid residue polypeptide inhibitor of barnase, derived from heteronuclear NMR techniques. These were obtained from measurements on unlabeled, unif ...

    We present the high-resolution solution structure and 13C assignments of wild-type barstar, an 89 amino acid residue polypeptide inhibitor of barnase, derived from heteronuclear NMR techniques. These were obtained from measurements on unlabeled, uniformly 15N- and 13C/15N-labeled, and 10% 13C-labeled barstar samples that have both cysteines (at positions 40 and 82) fully reduced. In total, 30 structures were calculated by hybrid distance geometry-dynamical simulated annealing calculations. The atomic rms distribution about the mean coordinate positions is 0.42 A for all backbone atoms and 0.90 A for all atoms. The structure is composed of three parallel alpha-helices packed against a three-stranded parallel beta-sheet. A more poorly defined helix links the second beta-strand and the third major alpha-helix. The loop involved in binding barnase is extremely well defined and held rigidly by interactions from the main body of the protein to both ends and the middle of the loop. This structure will be used to aid protein engineering studies currently taking place on the free and bound states of barstar and barnase.


    Related Citations: 
    • Barnase and Barstar: Two Small Proteins to Fold and Fit Together
      Hartley, R.W.
      (1989) Trends Biochem.Sci. 14: 450


    Organizational Affiliation

    Cambridge Centre for Protein Engineering, Department of Chemistry, University of Cambridge, U.K.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BARSTAR
A
89Bacillus amyloliquefaciensN/A
Find proteins for P11540 (Bacillus amyloliquefaciens)
Go to UniProtKB:  P11540
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 30 
  • Olderado: 1BTB Olderado
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-07-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance