Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 31.00 kDa 
• Atom Count: 2169 
• Modelled Residue Count: 264 
• Deposited Residue Count: 281 
• Unique protein chains: 2

1U7B

Crystal structure of hPCNA bound to residues 331-350 of the flap endonuclease-1 (FEN1)

• PDB DOI: 10.2210/pdb1U7B/pdb

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


• Deposited: 2004-08-03 Released: 2004-12-14 
• Deposition Author(s): Bruning, J.B., Shamoo, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.88 Å
• R-Value Free: 0.265 
• R-Value Work: 0.217 
• R-Value Observed: 0.217 

Literature

Structural and Thermodynamic Analysis of Human PCNA with Peptides Derived from DNA Polymerase-delta p66 Subunit and Flap Endonuclease-1.

Bruning, J.B., Shamoo, Y.

(2004) Structure 12: 2209-2219

• PubMed: 15576034 
• DOI: 10.1016/j.str.2004.09.018
• Primary Citation of Related Structures:  
  1U76, 1U7B


• PubMed Abstract: 
  

Human Proliferating Cellular Nuclear Antigen (hPCNA), a member of the sliding clamp family of proteins, makes specific protein-protein interactions with DNA replication and repair proteins through a small peptide motif termed the PCNA-interacting protein, or PIP-box. We solved the structure of hPCNA bound to PIP-box-containing peptides from the p66 subunit of the human replicative DNA polymerase-delta (452-466) at 2.6 A and of the flap endonuclease (FEN1) (331-350) at 1.85 A resolution. Both structures demonstrate that the pol-delta p66 and FEN1 peptides interact with hPCNA at the same site shown to bind the cdk-inhibitor p21(CIP1). Binding studies indicate that peptides from the p66 subunit of the pol-delta holoenzyme and FEN1 bind hPCNA from 189- to 725-fold less tightly than those of p21. Thus, the PIP-box and flanking regions provide a small docking peptide whose affinities can be readily adjusted in accord with biological necessity to mediate the binding of DNA replication and repair proteins to hPCNA.

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Organizational Affiliation: 

Department of Biochemistry and Cell Biology, Rice University, 6100 South Main Street, MS140, Houston, TX 77005, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Proliferating cell nuclear antigen	A	261	Homo sapiens	Mutation(s): 0  Gene Names: PCNA
UniProt & NIH Common Fund Data Resources
Find proteins for P12004 (Homo sapiens) Explore P12004  Go to UniProtKB:  P12004
PHAROS:  P12004 GTEx:  ENSG00000132646

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
SRQGSTQGRLDDFFKVTGSL peptide of Flap endonuclease-1	B	20	N/A	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P39748 (Homo sapiens) Explore P39748  Go to UniProtKB:  P39748
PHAROS:  P39748 GTEx:  ENSG00000168496

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.88 Å
• R-Value Free: 0.265 
• R-Value Work: 0.217 
• R-Value Observed: 0.217 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.498	α = 90
b = 81.498	β = 90
c = 67.312	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-08-03 
• Released Date: 2004-12-14 
Deposition Author(s): Bruning, J.B., Shamoo, Y.

Revision History  

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