Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 26.69 kDa 
• Atom Count: 1,874 
• Modelled Residue Count: 215 
• Deposited Residue Count: 232 
• Unique protein chains: 2

 3BQO

Crystal Structure of TRF1 TRFH domain and TIN2 peptide complex

• PDB DOI:  https://doi.org/10.2210/pdb3BQO/pdb

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


• Deposited: 2007-12-20 Released: 2008-02-19 
• Deposition Author(s): Chen, Y., Yang, Y., van Overbeek, M., Donigian, J.R., Baciu, P., de Lange, T., Lei, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.237 
• R-Value Work: 0.220 

Literature

A shared docking motif in TRF1 and TRF2 used for differential recruitment of telomeric proteins.

Chen, Y., Yang, Y., van Overbeek, M., Donigian, J.R., Baciu, P., de Lange, T., Lei, M.

(2008) Science 319: 1092-1096

• PubMed: 18202258 
• DOI: https://doi.org/10.1126/science.1151804
• Primary Citation of Related Structures:  
  3BQO, 3BU8, 3BUA


• PubMed Abstract: 
  

Mammalian telomeres are protected by a six-protein complex: shelterin. Shelterin contains two closely related proteins (TRF1 and TRF2), which recruit various proteins to telomeres. We dissect the interactions of TRF1 and TRF2 with their shared binding partner (TIN2) and other shelterin accessory factors. TRF1 recognizes TIN2 using a conserved molecular surface in its TRF homology (TRFH) domain. However, this same surface does not act as a TIN2 binding site in TRF2, and TIN2 binding to TRF2 is mediated by a region outside the TRFH domain. Instead, the TRFH docking site of TRF2 binds a shelterin accessory factor (Apollo), which does not interact with the TRFH domain of TRF1. Conversely, the TRFH domain of TRF1, but not of TRF2, interacts with another shelterin-associated factor: PinX1.

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Organizational Affiliation: 

Department of Biological Chemistry, University of Michigan Medical School, 1150 West Medical Center Drive, Ann Arbor, MI 48109, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Telomeric repeat-binding factor 1	A	211	Homo sapiens	Mutation(s): 0  Gene Names: TERF1, PIN2, TRBF1, TRF, TRF1
UniProt & NIH Common Fund Data Resources
Find proteins for P54274 (Homo sapiens) Explore P54274  Go to UniProtKB:  P54274
PHAROS:  P54274

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TERF1-interacting nuclear factor 2	B	21	Homo sapiens	Mutation(s): 0  Gene Names: TINF2, TIN2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BSI4 (Homo sapiens) Explore Q9BSI4  Go to UniProtKB:  Q9BSI4
PHAROS:  Q9BSI4

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.237 
• R-Value Work: 0.220 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 117.105	α = 90
b = 117.105	β = 90
c = 88.018	γ = 120

Software Package:

Software Name	Purpose
PHASER	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-02-19 
Deposition Author(s): Chen, Y., Yang, Y., van Overbeek, M., Donigian, J.R., Baciu, P., de Lange, T., Lei, M.

Revision History  

• Version 1.0: 2008-02-19
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance