Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 18.66 kDa 
• Atom Count: 1380 
• Modelled Residue Count: 166 
• Deposited Residue Count: 166 
• Unique protein chains: 1

2XVS

Crystal structure of human TTC5 (Strap) C-terminal OB domain

• PDB DOI: 10.2210/pdb2XVS/pdb

• Classification: ANTITUMOR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-10-31 Released: 2010-11-17 
• Deposition Author(s): Adams, J., Pike, A.C.W., Maniam, S., Sharpe, T.D., Coutts, A.S., Knapp, S., La Thangue, B., Bullock, A.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.236 
• R-Value Work: 0.172 
• R-Value Observed: 0.175 

Literature

The P53 Cofactor Strap Exhibits an Unexpected Tpr Motif and Oligonucleotide-Binding (Ob)-Fold Structure.

Adams, C.J., Pike, A.C., Maniam, S., Sharpe, T.D., Coutts, A.S., Knapp, S., La Thangue, N.B., Bullock, A.N.

(2012) Proc Natl Acad Sci U S A 109: 3778

• PubMed: 22362889 
• DOI: 10.1073/pnas.1113731109
• Primary Citation of Related Structures:  
  2XVS, 4ABN


• PubMed Abstract: 
  

Activation of p53 target genes for tumor suppression depends on the stress-specific regulation of transcriptional coactivator complexes. Strap (stress-responsive activator of p300) is activated upon DNA damage by ataxia telangiectasia mutated (ATM) and Chk2 kinases and is a key regulator of the p53 response. In addition to antagonizing Mdm2, Strap facilitates the recruitment of p53 coactivators, including JMY and p300. Strap is a predicted TPR-repeat protein, but shows only limited sequence identity with any protein of known structure. To address this and to elucidate the molecular mechanism of Strap activity we determined the crystal structure of the full-length protein at 2.05 Å resolution. The structure of Strap reveals an atypical six tetratricopeptide repeat (TPR) protein that also contains an unexpected oligonucleotide/oligosaccharide-binding (OB)-fold domain. This previously unseen domain organization provides an extended superhelical scaffold allowing for protein-protein as well as protein-DNA interaction. We show that both of the TPR and OB-fold domains localize to the chromatin of p53 target genes and exhibit intrinsic regulatory activity necessary for the Strap-dependent p53 response.

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Organizational Affiliation: 

Laboratory of Cancer Biology, Department of Oncology, Medical Sciences Division, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TETRATRICOPEPTIDE REPEAT PROTEIN 5	A	166	Homo sapiens	Mutation(s): 0  Gene Names: TTC5
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N0Z6 (Homo sapiens) Explore Q8N0Z6  Go to UniProtKB:  Q8N0Z6
PHAROS:  Q8N0Z6 GTEx:  ENSG00000136319

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
IOD	B [auth A], E [auth A], F [auth A]	IODIDE ION I XMBWDFGMSWQBCA-UHFFFAOYSA-M
EDO	C [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL	D [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.236 
• R-Value Work: 0.172 
• R-Value Observed: 0.175 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 30.26	α = 90
b = 62.39	β = 90
c = 78.77	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-10-31 
• Released Date: 2010-11-17 
Deposition Author(s): Adams, J., Pike, A.C.W., Maniam, S., Sharpe, T.D., Coutts, A.S., Knapp, S., La Thangue, B., Bullock, A.N.

Revision History  

• Version 1.0: 2010-11-17
  Type: Initial release
  
• Version 1.1: 2012-03-14
  Changes: Database references, Structure summary
• Version 1.2: 2012-03-21
  Changes: Other