Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 6-mer - A3B3 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 214074.05 
• Atom Count: 13161 
• Residue Count: 1920 
• Unique protein chains: 2

1UL1

Crystal structure of the human FEN1-PCNA complex

• DOI: 10.2210/pdb1UL1/pdb

• Classification: HYDROLASE/DNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2003-09-05 Released: 2005-03-01 
• Deposition Author(s): Sakurai, S., Kitano, K., Yamaguchi, H., Hamada, K., Okada, K., Fukuda, K., Uchida, M., Ohtsuka, E., Morioka, H., Hakoshima, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.9 Å
• R-Value Free: 0.284 
• R-Value Work: 0.220 

Literature

Structural basis for recruitment of human flap endonuclease 1 to PCNA

Sakurai, S., Kitano, K., Yamaguchi, H., Okada, K., Hamada, K., Fukuda, K., Uchida, M., Ohtsuka, E., Morioka, H., Hakoshima, T.

(2005) EMBO J. 24: 683-693

• PubMed: 15616578 
• DOI: 10.1038/sj.emboj.7600519


• PubMed Abstract: 
  

Flap endonuclease-1 (FEN1) is a key enzyme for maintaining genomic stability and replication. Proliferating cell nuclear antigen (PCNA) binds FEN1 and stimulates its endonuclease activity. The structural basis of the FEN1-PCNA interaction was revealed by the crystal structure of the complex between human FEN1 and PCNA. The main interface involves the C-terminal tail of FEN1, which forms two beta-strands connected by a short helix, the betaA-alphaA-betaB motif, participating in beta-beta and hydrophobic interactions with PCNA. These interactions are similar to those previously observed for the p21CIP1/WAF1 peptide. However, this structure involving the full-length enzyme has revealed additional interfaces that are involved in the core domain. The interactions at the interfaces maintain the enzyme in an inactive 'locked-down' orientation and might be utilized in rapid DNA-tracking by preserving the central hole of PCNA for sliding along the DNA. A hinge region present between the core domain and the C-terminal tail of FEN1 would play a role in switching the FEN1 orientation from an inactive to an active orientation.

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Organizational Affiliation: 

Structural Biology Laboratory, Nara Institute of Science and Technology, Takayama, Ikoma, Nara, Japan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Flap endonuclease-1	X, Y, Z	379	Homo sapiens	Mutation(s): 0  Gene Names: FEN1 (RAD2) EC: 3.1.-.-
Find proteins for P39748 (Homo sapiens) Go to Gene View: FEN1 Go to UniProtKB:  P39748

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Proliferating cell nuclear antigen	A, B, C	261	Homo sapiens	Mutation(s): 0  Gene Names: PCNA
Find proteins for P12004 (Homo sapiens) Go to Gene View: PCNA Go to UniProtKB:  P12004

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
MG	X, Y	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.9 Å
• R-Value Free: 0.284 
• R-Value Work: 0.220 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 82.203	α = 90.00
b = 143.383	β = 90.00
c = 246.659	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-05 
• Released Date: 2005-03-01 
• Deposition Author(s): Sakurai, S., Kitano, K., Yamaguchi, H., Hamada, K., Okada, K., Fukuda, K., Uchida, M., Ohtsuka, E., Morioka, H., Hakoshima, T.

Revision History 

• Version 1.0: 2005-03-01
  Type: Initial release
• Version 1.1: 2007-10-23
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance