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 1.4 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

  • DOI: https://doi.org/10.1016/s0022-2836(02)01152-x
  • Primary Citation of Related Structures:  
    1MWN

  • 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-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.


  • Organizational Affiliation

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


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
S-100 protein, beta chain
A, B
92Rattus norvegicusMutation(s): 0 
Gene Names: S100B
UniProt
Find proteins for P04631 (Rattus norvegicus)
Explore P04631 
Go to UniProtKB:  P04631
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UniProt GroupP04631
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
F-actin capping protein alpha-1 subunitC [auth X],
D [auth Y]
12N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P52907 (Homo sapiens)
Explore P52907 
Go to UniProtKB:  P52907
PHAROS:  P52907
GTEx:  ENSG00000116489 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52907
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection