Macromolecule Content

• Total Structure Weight: 21.52 kDa 
• Atom Count: 1502 
• Residue Count: 184 
• Unique protein chains: 1

1B4C

SOLUTION STRUCTURE OF RAT APO-S100B USING DIPOLAR COUPLINGS

• DOI: 10.2210/pdb1B4C/pdb
• BMRB: 4001

• Classification: METAL BINDING PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-12-17 Released: 1998-12-30 
• Deposition Author(s): Weber, D.J., Drohat, A.C., Tjandra, N., Baldisseri, D.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 21 
• Conformers Submitted: 21 
• Selection Criteria: SEE MAIN REFERENCE 

Literature

The use of dipolar couplings for determining the solution structure of rat apo-S100B(betabeta).

Drohat, A.C., Tjandra, N., Baldisseri, D.M., Weber, D.J.

(1999) Protein Sci 8: 800-809

• PubMed: 10211826 
• DOI: 10.1110/ps.8.4.800
• Primary Citation of Related Structures:  
  1B4C


• PubMed Abstract: 
  

The relative orientations of adjacent structural elements without many well-defined NOE contacts between them are typically poorly defined in NMR structures. For apo-S100B(betabeta) and the structurally homologous protein calcyclin, the solution structures determined by conventional NMR exhibited considerable differences and made it impossible to draw unambiguous conclusions regarding the Ca2+-induced conformational change required for target protein binding. The structure of rat apo-S100B(betabeta) was recalculated using a large number of constraints derived from dipolar couplings that were measured in a dilute liquid crystalline phase. The dipolar couplings orient bond vectors relative to a single-axis system, and thereby remove much of the uncertainty in NOE-based structures. The structure of apo-S100B(betabeta) indicates a minimal change in the first, pseudo-EF-hand Ca2+ binding site, but a large reorientation of helix 3 in the second, classical EF-hand upon Ca2+ binding.

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Related Citations: 

• Solution Structure of Rat Apo-S100B(beta beta) as Determined by NMR Spectroscopy
  Drohat, A.C., Amburgey, J.C., Abildgaard, F., Starich, M.R., Baldisseri, D.M., Weber, D.J.
  (1996) Biochemistry 35: 11577

• ==1==H, ==13==C and ==15==N NMR Assignments and Solution Secondary Structure of Rat Apo-S100Beta
  Amburgey, J.C., Abildgaard, F., Starich, M.R., Shah, S., Hilt, D.C., Weber, D.J.
  (1995) J Biomol NMR 6: 171

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore 21201, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (S-100 PROTEIN, BETA CHAIN)	A, B	92	Rattus norvegicus	Mutation(s): 0  Gene Names: S100BETA FROM RATTUS NORVEGICUS (RAT), S100b
Find proteins for P04631 (Rattus norvegicus) Explore P04631  Go to UniProtKB:  P04631

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 21 
• Conformers Submitted: 21 
• Selection Criteria: SEE MAIN REFERENCE 
• OLDERADO: 1B4C Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-12-17 
• Released Date: 1998-12-30 
Deposition Author(s): Weber, D.J., Drohat, A.C., Tjandra, N., Baldisseri, D.M.

Revision History 

• Version 1.0: 1998-12-30
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance