ISDA

Entry Detail

PDB ID:

1DT7

Keywords:

SIGNALING PROTEIN

Title:

SOLUTION STRUCTURE OF THE C-TERMINAL NEGATIVE REGULATORY DOMAIN OF P53 IN A COMPLEX WITH CA2+-BOUND S100B(BB)

Biological Source:

Source Organism:

Rattus norvegicus,

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2000-01-11

Release Date:

2000-07-26

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

structure with the lowest energy and the least restraint violations

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:S100 CALCIUM-BINDING PROTEIN
Chain IDs:A, B
Chain Length:92
Number of Molecules:2
Biological Source:Rattus norvegicus

UniProt ID:P04631 Pfam ID:PF01023, PF00036

Protein Blast

Polymer Type:polypeptide(L)
Description:CELLULAR TUMOR ANTIGEN P53
Chain IDs:C (auth: X), D (auth: Y)
Chain Length:22
Number of Molecules:2
Biological Source:

UniProt ID:P04637

Ligand Molecules

Primary Citation

Structure of the negative regulatory domain of p53 bound to S100B(betabeta).

Rustandi, R.R, Baldisseri, D.M, Weber, D.J.Show

Nat.Struct.Biol. 7 570 574 (2000)

PMID: 10876243 DOI: 10.1038/76797

Abstact

A Ca2+ dependent conformational change in dimeric S100B(betabeta) is required for it to bind p53 and inhibit phosphorylation of this tumor suppressor in its C-terminal negative regulatory domain. A peptide derived from this region of p53 (residues 367-388) was found to have no regular structure in its native form by NMR spectroscopy, but becomes helical when bound to Ca2+ loaded S100B(betabeta). The three-dimensional structure of this complex reveals several favorable hydrophobic and electrostatic interactions between S100B(betabeta) and the p53 peptide in the binding pocket, where S100B(betabeta) sterically blocks sites of phosphorylation and acetylation on p53 that are important for transcription activation.

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Primary Citation of related structures