5ZOD

Crystal Structure of hFen1 in apo form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Structural basis of 5' flap recognition and protein-protein interactions of human flap endonuclease 1.

Xu, H.Shi, R.Han, W.Cheng, J.Xu, X.Cheng, K.Wang, L.Tian, B.Zheng, L.Shen, B.Hua, Y.Zhao, Y.

(2018) Nucleic Acids Res 46: 11315-11325

  • DOI: https://doi.org/10.1093/nar/gky911
  • Primary Citation of Related Structures:  
    5ZOD, 5ZOE, 5ZOF, 5ZOG

  • PubMed Abstract: 

    Human flap endonuclease 1 (hFEN1) is a structure-specific nuclease essential for DNA replication and repair processes. hFEN1 has 5' flap removal activity, as well as gap endonuclease activity that is critical for restarting stalled replication forks. Here, we report the crystal structures of wild-type and mutant hFEN1 proteins in complex with DNA substrates, followed by mutagenesis studies that provide mechanistic insight into the protein-protein interactions of hFEN1. We found that in an α-helix forming the helical gateway of hFEN1 recognizes the 5' flap prior to its threading into the active site for cleavage. We also found that the β-pin region is rigidified into a short helix in R192F hFEN1-DNA structures, suppressing its gap endonuclease activity and cycle-dependent kinase interactions. Our findings suggest that a single mutation at the primary methylation site can alter the function of hFEN1 and provide insight into the role of the β-pin region in hFEN1 protein interactions that are essential for DNA replication and repair.


  • Organizational Affiliation

    Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Sciences, Zhejiang University, Hangzhou, Zhejiang 310029, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Flap endonuclease 1333Homo sapiensMutation(s): 0 
Gene Names: FEN1RAD2
EC: 3.1
UniProt & NIH Common Fund Data Resources
Find proteins for P39748 (Homo sapiens)
Explore P39748 
Go to UniProtKB:  P39748
PHAROS:  P39748
GTEx:  ENSG00000168496 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP39748
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.95α = 90
b = 61.07β = 90
c = 110.45γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31500656

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-30
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Derived calculations, Refinement description