5T2F

Structure of the FHA1 domain of Rad53 bound to the BRCT domain of Dbf4

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

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This is version 1.2 of the entry. See complete history. 


Literature

'AND' logic gates at work: Crystal structure of Rad53 bound to Dbf4 and Cdc7.

Almawi, A.W., Matthews, L.A., Myrox, P., Boulton, S., Lai, C., Moraes, T., Melacini, G., Ghirlando, R., Duncker, B.P., Guarne, A.

(2016) Sci Rep 6: 34237-34237

  • DOI: 10.1038/srep34237
  • Primary Citation of Related Structures:  
    5T2F, 5T2S

  • PubMed Abstract: 

    • Forkhead-associated (FHA) domains are phosphopeptide recognition modules found in many signaling proteins. The Saccharomyces cerevisiae protein kinase Rad53 is a key regulator of the DNA damage checkpoint and uses its two FHA domains to interact with mul ...

    Forkhead-associated (FHA) domains are phosphopeptide recognition modules found in many signaling proteins. The Saccharomyces cerevisiae protein kinase Rad53 is a key regulator of the DNA damage checkpoint and uses its two FHA domains to interact with multiple binding partners during the checkpoint response. One of these binding partners is the Dbf4-dependent kinase (DDK), a heterodimer composed of the Cdc7 kinase and its regulatory subunit Dbf4. Binding of Rad53 to DDK, through its N-terminal FHA (FHA1) domain, ultimately inhibits DDK kinase activity, thereby preventing firing of late origins. We have previously found that the FHA1 domain of Rad53 binds simultaneously to Dbf4 and a phosphoepitope, suggesting that this domain functions as an 'AND' logic gate. Here, we present the crystal structures of the FHA1 domain of Rad53 bound to Dbf4, in the presence and absence of a Cdc7 phosphorylated peptide. Our results reveal how the FHA1 uses a canonical binding interface to recognize the Cdc7 phosphopeptide and a non-canonical interface to bind Dbf4. Based on these data we propose a mechanism to explain how Rad53 enhances the specificity of FHA1-mediated transient interactions.

    Organizational Affiliation: 

    Department of Biochemistry and Biomedical Sciences, ON, Canada.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DDK kinase regulatory subunit DBF4,Serine/threonine-protein kinase RAD53 chimeric protein A, B, C, D269Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: 
EC: 2.7.12.1
Find proteins for P22216 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P22216 
Go to UniProtKB:  P22216
Find proteins for P32325 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32325 
Go to UniProtKB:  P32325
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.775α = 109.24
b = 66.527β = 90.88
c = 86.52γ = 90.3
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaMOP-67189

Revision History 

  • Version 1.0: 2017-03-15
    Type: Initial release
  • Version 1.1: 2017-03-22
    Changes: Structure summary
  • Version 1.2: 2020-01-08
    Changes: Author supporting evidence