5WE1

Structural Basis for Shelterin Bridge Assembly


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.202 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Basis for Shelterin Bridge Assembly.

Kim, J.K.Liu, J.Hu, X.Yu, C.Roskamp, K.Sankaran, B.Huang, L.Komives, E.A.Qiao, F.

(2017) Mol. Cell 68: 698-714.e5

  • DOI: 10.1016/j.molcel.2017.10.032
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Telomere elongation through telomerase enables chromosome survival during cellular proliferation. The conserved multifunctional shelterin complex associates with telomeres to coordinate multiple telomere activities, including telomere elongation by t ...

    Telomere elongation through telomerase enables chromosome survival during cellular proliferation. The conserved multifunctional shelterin complex associates with telomeres to coordinate multiple telomere activities, including telomere elongation by telomerase. Similar to the human shelterin, fission yeast shelterin is composed of telomeric sequence-specific double- and single-stranded DNA-binding proteins, Taz1 and Pot1, respectively, bridged by Rap1, Poz1, and Tpz1. Here, we report the crystal structure of the fission yeast Tpz1475-508-Poz1-Rap1467-496 complex that provides the structural basis for shelterin bridge assembly. Biochemical analyses reveal that shelterin bridge assembly is a hierarchical process in which Tpz1 binding to Poz1 elicits structural changes in Poz1, allosterically promoting Rap1 binding to Poz1. Perturbation of the cooperative Tpz1-Poz1-Rap1 assembly through mutation of the "conformational trigger" in Poz1 leads to unregulated telomere lengthening. Furthermore, we find that the human shelterin counterparts TPP1-TIN2-TRF2 also assemble hierarchically, indicating cooperativity as a conserved driving force for shelterin assembly.


    Organizational Affiliation

    Department of Biological Chemistry, School of Medicine, University of California, Irvine, Irvine, CA 92697-1700, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protection of telomeres protein poz1,Protection of telomeres protein poz1
A, C
214Schizosaccharomyces pombe (strain 972 / ATCC 24843)Mutation(s): 0 
Gene Names: poz1
Find proteins for O13852 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  O13852
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protection of telomeres protein tpz1
B, D
33Schizosaccharomyces pombe (strain 972 / ATCC 24843)Mutation(s): 0 
Gene Names: tpz1 (mug169)
Find proteins for O14246 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  O14246
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.202 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.266 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 66.110α = 90.00
b = 66.110β = 90.00
c = 123.160γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata processing
SCALAdata scaling
MOSFLMdata reduction
PHENIXphasing
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-20
    Type: Initial release