1H6P image
Deposition Date 2001-06-20
Release Date 2001-09-05
Last Version Date 2024-05-08
Entry Detail
PDB ID:
1H6P
Title:
Dimeristion domain from human TRF2
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.26
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:TELOMERIC REPEAT BINDING FACTOR 2
Gene (Uniprot):TERF2
Chain IDs:A, B
Chain Length:203
Number of Molecules:2
Biological Source:HOMO SAPIENS
Ligand Molecules
Primary Citation
Structure of the Trfh Dimerization Domain of the Human Telomere Proteins Trf1 and Trf2
Mol.Cell 8 351 361 (2001)
PMID: 11545737 DOI: 10.1016/S1097-2765(01)00321-5

Abstact

TRF1 and TRF2 are key components of vertebrate telomeres. They bind to double-stranded telomeric DNA as homodimers. Dimerization involves the TRF homology (TRFH) domain, which also mediates interactions with other telomeric proteins. The crystal structures of the dimerization domains from human TRF1 and TRF2 were determined at 2.9 and 2.2 A resolution, respectively. Despite a modest sequence identity, the two TRFH domains have the same entirely alpha-helical architecture, resembling a twisted horseshoe. The dimerization interfaces feature unique interactions that prevent heterodimerization. Mutational analysis of TRF1 corroborates the structural data and underscores the importance of the TRFH domain in dimerization, DNA binding, and telomere localization. A possible structural homology between the TRFH domain of fission yeast telomeric protein Taz1 with those of the vertebrate TRFs is suggested.

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Primary Citation of related structures