4B08

Yeast DNA polymerase alpha, Selenomethionine protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.67 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mechanism for Priming DNA Synthesis by Yeast DNA Polymerase Alpha

Perera, R.L.Torella, R.Klinge, S.Kilkenny, M.L.Maman, J.D.Pellegrini, L.

(2013) Elife 2: 482

  • DOI: 10.7554/eLife.00482
  • Primary Citation of Related Structures:  4FVM, 4FXD, 4FYD

  • PubMed Abstract: 
  • The DNA Polymerase α (Pol α)/primase complex initiates DNA synthesis in eukaryotic replication. In the complex, Pol α and primase cooperate in the production of RNA-DNA oligonucleotides that prime synthesis of new DNA. Here we report crystal structur ...

    The DNA Polymerase α (Pol α)/primase complex initiates DNA synthesis in eukaryotic replication. In the complex, Pol α and primase cooperate in the production of RNA-DNA oligonucleotides that prime synthesis of new DNA. Here we report crystal structures of the catalytic core of yeast Pol α in unliganded form, bound to an RNA primer/DNA template and extending an RNA primer with deoxynucleotides. We combine the structural analysis with biochemical and computational data to demonstrate that Pol α specifically recognizes the A-form RNA/DNA helix and that the ensuing synthesis of B-form DNA terminates primer synthesis. The spontaneous release of the completed RNA-DNA primer by the Pol α/primase complex simplifies current models of primer transfer to leading- and lagging strand polymerases. The proposed mechanism of nucleotide polymerization by Pol α might contribute to genomic stability by limiting the amount of inaccurate DNA to be corrected at the start of each Okazaki fragment. DOI:http://dx.doi.org/10.7554/eLife.00482.001.


    Organizational Affiliation

    Department of Biochemistry , University of Cambridge , Cambridge , United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA POLYMERASE ALPHA CATALYTIC SUBUNIT A
A
910Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: POL1 (CDC17)
EC: 2.7.7.7
Find proteins for P13382 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P13382
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.67 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.195 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 73.969α = 90.00
b = 127.447β = 90.00
c = 144.076γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
SCALAdata scaling
PHENIXrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-27
    Type: Initial release
  • Version 1.1: 2013-04-17
    Type: Database references
  • Version 1.2: 2013-05-01
    Type: Database references