WD40 domain of human AND-1

Experimental Data Snapshot

  • Resolution: 1.85 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 

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The structure and polymerase-recognition mechanism of the crucial adaptor protein AND-1 in the human replisome

Guan, C.Li, J.Sun, D.Liu, Y.Liang, H.

(2017) J Biol Chem 292: 9627-9636

  • DOI: https://doi.org/10.1074/jbc.M116.758524
  • Primary Citation of Related Structures:  
    5GVA, 5GVB

  • PubMed Abstract: 

    DNA replication in eukaryotic cells is performed by a multiprotein complex called the replisome, which consists of helicases, polymerases, and adaptor molecules. Human a cidic n ucleoplasmic D NA-binding protein 1 (AND-1), also known as WD repeat and high mobility group (HMG)-box DNA-binding protein 1 (WDHD1), is an adaptor molecule crucial for DNA replication. Although structural information for the AND-1 yeast ortholog is available, the mechanistic details for how human AND-1 protein anchors the lagging-strand DNA polymerase α (pol α) to the DNA helicase complex ( C dc45- M CM2-7- G INS, CMG) await elucidation. Here, we report the structures of the N-terminal WD40 and SepB domains of human AND-1, as well as a biochemical analysis of the C-terminal HMG domain. We show that AND-1 exists as a homotrimer mediated by the SepB domain. Mutant study results suggested that a positively charged groove within the SepB domain provides binding sites for pol α. Different from its ortholog protein in budding yeast, human AND-1 is recruited to the CMG complex, mediated by unknown participants other than Go Ichi Ni San. In addition, we show that AND-1 binds to DNA in vitro , using its C-terminal HMG domain. In conclusion, our findings provide important insights into the mechanistic details of human AND-1 function, advancing our understanding of replisome formation during eukaryotic replication.

  • Organizational Affiliation

    From the National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101 and.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
WD repeat and HMG-box DNA-binding protein 1344Homo sapiensMutation(s): 0 
Gene Names: WDHD1AND1
UniProt & NIH Common Fund Data Resources
Find proteins for O75717 (Homo sapiens)
Explore O75717 
Go to UniProtKB:  O75717
PHAROS:  O75717
GTEx:  ENSG00000198554 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75717
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.85 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.895α = 90
b = 79.895β = 90
c = 163.744γ = 90
Software Package:
Software NamePurpose
HKL-2000data processing
SCALEPACKdata scaling
PHENIXmodel building
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-19
    Type: Initial release
  • Version 1.1: 2017-06-21
    Changes: Database references