1K3Q

NMR structure of the FHA1 Domain of Rad53 in Complex with a Rad9-derived Phosphothreonine (at T192) Peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structures of two FHA1-phosphothreonine peptide complexes provide insight into the structural basis of the ligand specificity of FHA1 from yeast Rad53.

Yuan, C.Yongkiettrakul, S.Byeon, I.J.Zhou, S.Tsai, M.D.

(2001) J.Mol.Biol. 314: 563-575

  • DOI: 10.1006/jmbi.2001.5140
  • Primary Citation of Related Structures:  
  • Also Cited By: 2A0T

  • PubMed Abstract: 
  • Rad53, a yeast checkpoint protein involved in regulating the repair of DNA damage, contains two forkhead-associated domains, FHA1 and FHA2. Previous combinatorial library screening has shown that FHA1 strongly selects peptides containing a pTXXD moti ...

    Rad53, a yeast checkpoint protein involved in regulating the repair of DNA damage, contains two forkhead-associated domains, FHA1 and FHA2. Previous combinatorial library screening has shown that FHA1 strongly selects peptides containing a pTXXD motif. Subsequent location of this motif within the sequence of Rad9, the target protein, coupled with spectroscopic analysis has led to identification of a tight binding sequence that is likely the binding site of FHA1: (188)SLEV(pT)EADATFVQ(200). We present solution structures of FHA1 in complex with this pT-peptide and with another Rad9-derived pT-peptide that has ca 30-fold lower affinity, (148)KKMTFQ(pT)PTDPLE(160). Both complexes showed intermolecular NOEs predominantly between three peptide residues (pT, +1, and +2 residues) and five FHA1 residues (S82, R83, S85, T106, and N107). Furthermore, the following interactions were implicated on the basis of chemical shift perturbations and structural analysis: the phosphate group of the pT residue with the side-chain amide group of N86 and the guanidino group of R70, and the carboxylate group of Asp (at the +3 position) with the guanidino group of R83. The generated structures revealed a similar binding mode adopted by these two peptides, suggesting that pT and the +3 residue Asp are the major contributors to binding affinity and specificity, while +1 and +2 residues could provide additional fine-tuning. It was also shown that FHA1 does not bind to the corresponding pS-peptides or a related pY-peptide. We suggest that differentiation between pT and pS-peptides by FHA1 can be attributed to hydrophobic interactions between the methyl group of the pT residue and the aliphatic protons of R83, S85, and T106 from FHA1.


    Related Citations: 
    • Structure of the FHA1 Domain of Yeast Rad53 and Identification of Binding Sites for Both FHA1 and Its target Protein Rad9.
      Liao, H.,Yuan, C.,Su, M.I.,Yongkiettrakul, S.,Qin, D.,Li, H.,Byeon, I.J.,Pei, D.,Tsai, M.D.
      (2000) J.Mol.Biol. 304: 941


    Organizational Affiliation

    Department of Chemistry, The Ohio State University, Columbus OH 43210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Kinase SPK1
A
151Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: RAD53 (MEC2, SAD1, SPK1)
EC: 2.7.12.1
Find proteins for P22216 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P22216
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA repair protein Rad9
B
13Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: RAD9
Find proteins for P14737 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P14737
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
  • Olderado: 1K3Q Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance