3L0X

Structure of split yeast PCNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of monoubiquitinated PCNA and implications for translesion synthesis and DNA polymerase exchange.

Freudenthal, B.D.Gakhar, L.Ramaswamy, S.Washington, M.T.

(2010) Nat.Struct.Mol.Biol. 17: 479-484

  • DOI: 10.1038/nsmb.1776
  • Primary Citation of Related Structures:  3L0W, 3L10

  • PubMed Abstract: 
  • DNA synthesis by classical polymerases can be blocked by many lesions. These blocks are overcome by translesion synthesis, whereby the stalled classical, replicative polymerase is replaced by a nonclassical polymerase. In eukaryotes this polymerase e ...

    DNA synthesis by classical polymerases can be blocked by many lesions. These blocks are overcome by translesion synthesis, whereby the stalled classical, replicative polymerase is replaced by a nonclassical polymerase. In eukaryotes this polymerase exchange requires proliferating cell nuclear antigen (PCNA) monoubiquitination. To better understand the polymerase exchange, we developed a means of producing monoubiquitinated PCNA, by splitting the protein into two self-assembling polypeptides. We determined the X-ray crystal structure of monoubiquitinated PCNA and found that the ubiquitin moieties are located on the back face of PCNA and interact with it through their canonical hydrophobic surface. Moreover, the attachment of ubiquitin does not change PCNA's conformation. We propose that PCNA ubiquitination facilitates nonclassical polymerase recruitment to the back of PCNA by forming a new binding surface for nonclassical polymerases, consistent with a 'tool belt' model of the polymerase exchange.


    Organizational Affiliation

    Department of Biochemistry, University of Iowa College of Medicine, Iowa City, Iowa, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proliferating cell nuclear antigen
A
169Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: POL30
Find proteins for P15873 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P15873
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Proliferating cell nuclear antigen
B
94Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: POL30
Find proteins for P15873 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P15873
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.243 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 122.999α = 90.00
b = 122.999β = 90.00
c = 122.999γ = 90.00
Software Package:
Software NamePurpose
StructureStudiodata collection
d*TREKdata reduction
d*TREKdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance