1MWN

Solution NMR structure of S100B bound to the high-affinity target peptide TRTK-12


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution NMR structure of S100B bound to the high-affinity target peptide TRTK-12

Inman, K.G.Yang, R.Rustandi, R.R.Miller, K.E.Baldisseri, D.M.Weber, D.J.

(2002) J.Mol.Biol. 324: 1003-1014


  • PubMed Abstract: 
  • The solution NMR structure is reported for Ca(2+)-loaded S100B bound to a 12-residue peptide, TRTK-12, from the actin capping protein CapZ (alpha1 or alpha2 subunit, residues 265-276: TRTKIDWNKILS). This peptide was discovered by Dimlich and co-worke ...

    The solution NMR structure is reported for Ca(2+)-loaded S100B bound to a 12-residue peptide, TRTK-12, from the actin capping protein CapZ (alpha1 or alpha2 subunit, residues 265-276: TRTKIDWNKILS). This peptide was discovered by Dimlich and co-workers by screening a bacteriophage random peptide display library, and it matches exactly the consensus S100B binding sequence ((K/R)(L/I)XWXXIL). As with other S100B target proteins, a calcium-dependent conformational change in S100B is required for TRTK-12 binding. The TRTK-12 peptide is an amphipathic helix (residues W7 to S12) in the S100B-TRTK complex, and helix 4 of S100B is extended by three or four residues upon peptide binding. However, helical TRTK-12 in the S100B-peptide complex is uniquely oriented when compared to the three-dimensional structures of other S100-peptide complexes. The three-dimensional structure of the S100B-TRTK peptide complex illustrates that residues in the S100B binding consensus sequence (K4, I5, W7, I10, L11) are all involved in the S100B-peptide interface, which can explain its orientation in the S100B binding pocket and its relatively high binding affinity. A comparison of the S100B-TRTK peptide structure to the structures of apo- and Ca(2+)-bound S100B illustrates that the binding site of TRTK-12 is buried in apo-S100B, but is exposed in Ca(2+)-bound S100B as necessary to bind the TRTK-12 peptide.


    Related Citations: 
    • Structure of the negative regulatory domain of p53 bound to S100B(betabeta)
      Rustandi, R.R.,Baldisseri, D.M.,Weber, D.J.
      (2000) Nat.Struct.Mol.Biol. 7: 570
    • Solution structure of calcium-bound rat S100B(betabeta) as determined by nuclear magnetic resonance spectroscopy
      Drohat, A.C.,Baldisseri, D.M.,Rustandi, R.R.,Weber, D.J.
      (1998) Biochemistry 37: 2729
    • Solution structure of rat apo-S100B(betabeta) 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


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, School of Medicine, University of Maryland, 108 N. Greene St., Baltimore, MD 21201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
S-100 protein, beta chain
A, B
92Rattus norvegicusMutation(s): 0 
Gene Names: S100b
Find proteins for P04631 (Rattus norvegicus)
Go to UniProtKB:  P04631
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
F-actin capping protein alpha-1 subunit
X, Y
12Homo sapiensMutation(s): 0 
Gene Names: CAPZA1
Find proteins for P52907 (Homo sapiens)
Go to Gene View: CAPZA1
Go to UniProtKB:  P52907
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1MWN Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-12-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance