5B7J

Structure model of Sap1-DNA complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Sap1 is a replication-initiation factor essential for the assembly of pre-replicative complex in the fission yeast Schizosaccharomyces pombe

Guan, L.He, P.Yang, F.Zhang, Y.Hu, Y.Ding, J.Hua, Y.Zhang, Y.Ye, Q.Hu, J.Wang, T.Jin, C.Kong, D.

(2017) J Biol Chem 292: 6056-6075

  • DOI: https://doi.org/10.1074/jbc.M116.767806
  • Primary Citation of Related Structures:  
    5B7J, 5JDK

  • PubMed Abstract: 

    A central step in the initiation of chromosomal DNA replication in eukaryotes is the assembly of pre-replicative complex (pre-RC) at late M and early G 1 phase of the cell cycles. Since 1973, four proteins or protein complexes, including cell division control protein 6 (Cdc6)/Cdc18, minichromosome maintenance protein complex, origin recognition complex (ORC), and Cdt1, are known components of the pre-RC. Previously, we reported that a non-ORC protein binds to the essential element Δ9 of the Schizosaccharomyces pombe DNA-replication origin ARS3001. In this study, we identified that the non-ORC protein is Sap1. Like ORC, Sap1 binds to DNA origins during cell growth cycles. But unlike ORC, which binds to asymmetric AT-rich sequences through its nine AT-hook motifs, Sap1 preferentially binds to a DNA sequence of 5'-(A/T) n (C/G)(A/T) 9-10 (G/C)(A/T) n -3' ( n ≥ 1). We also found that Sap1 and ORC physically interact. We further demonstrated that Sap1 is required for the assembly of the pre-RC because of its essential role in recruiting Cdc18 to DNA origins. Thus, we conclude that Sap1 is a replication-initiation factor that directly participates in the assembly of the pre-RC. DNA-replication origins in fission yeast are defined by possessing two essential elements with one bound by ORC and the other by Sap1.


  • Organizational Affiliation

    From the Peking-Tsinghua Center for Life Sciences, National Laboratory of Protein and Plant Gene Research, College of Life Sciences.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Switch-activating protein 1111Schizosaccharomyces pombe 972h-Mutation(s): 0 
Gene Names: sap1SPCC1672.02c
UniProt
Find proteins for P40847 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore P40847 
Go to UniProtKB:  P40847
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40847
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*CP*AP*AP*AP*AP*CP*AP*AP*TP*AP*TP*T)-3')12Schizosaccharomyces pombe
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*AP*AP*TP*AP*TP*TP*GP*TP*TP*TP*TP*G)-3')12Schizosaccharomyces pombe
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-22
    Type: Initial release
  • Version 1.1: 2017-05-24
    Changes: Database references