1XJV

Crystal structure of human POT1 bound to telomeric single-stranded DNA (TTAGGGTTAG)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of human POT1 bound to telomeric single-stranded DNA provides a model for chromosome end-protection

Lei, M.Podell, E.R.Cech, T.R.

(2004) Nat.Struct.Mol.Biol. 11: 1223-1229

  • DOI: 10.1038/nsmb867

  • PubMed Abstract: 
  • The POT1 (protection of telomeres 1) protein binds the single-stranded overhang at the ends of chromosomes in diverse eukaryotes. It is essential for chromosome end-protection in the fission yeast Schizosaccharomyces pombe, and it is involved in regu ...

    The POT1 (protection of telomeres 1) protein binds the single-stranded overhang at the ends of chromosomes in diverse eukaryotes. It is essential for chromosome end-protection in the fission yeast Schizosaccharomyces pombe, and it is involved in regulation of telomere length in human cells. Here, we report the crystal structure at a resolution of 1.73 A of the N-terminal half of human POT1 (hPOT1) protein bound to a telomeric single-stranded DNA (ssDNA) decamer, TTAGGGTTAG, the minimum tight-binding sequence indicated by in vitro binding assays. The structure reveals that hPOT1 contains two oligonucleotide/ oligosaccharide-binding (OB) folds; the N-terminal OB fold binds the first six nucleotides, resembling the structure of the S. pombe Pot1pN-ssDNA complex, whereas the second OB fold binds and protects the 3' end of the ssDNA. These results provide an atomic-resolution model for chromosome end-capping.


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protection of telomeres 1
A
294Homo sapiensGene Names: POT1
Find proteins for Q9NUX5 (Homo sapiens)
Go to Gene View: POT1
Go to UniProtKB:  Q9NUX5
Entity ID: 1
MoleculeChainsLengthOrganism
hT10 d(TTAGGGTTAG)B10N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.228 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 102.026α = 90.00
b = 103.243β = 90.00
c = 71.664γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSphasing
CNSrefinement
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance