1R21

Solution Structure of human Ki67 FHA Domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 23 
  • Selection Criteria: structures with the lowest energy,target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Human Ki67 FHA Domain and its Binding to a Phosphoprotein Fragment from hNIFK Reveal Unique Recognition Sites and New Views to the Structural Basis of FHA Domain Functions

Li, H.Byeon, I.J.Ju, Y.Tsai, M.D.

(2004) J.Mol.Biol. 335: 371-381


  • PubMed Abstract: 
  • Recent studies by use of short phosphopeptides showed that forkhead-associated (FHA) domains recognize pTXX(D/I/L) motifs. Solution structures and crystal structures of several different FHA domains and their complexes with short phosphopeptides have ...

    Recent studies by use of short phosphopeptides showed that forkhead-associated (FHA) domains recognize pTXX(D/I/L) motifs. Solution structures and crystal structures of several different FHA domains and their complexes with short phosphopeptides have been reported by several groups. We now report the solution structure of the FHA domain of human Ki67, a large nuclear protein associated with the cell-cycle. Using fragments of its binding partner hNIFK, we show that Ki67-hNIFK binding involves ca 44 residues without a pTXX(D/I/L) motif. The pThr site of hNIFK recognized by Ki67 FHA is pThr234-Pro235, a motif also recognized by the proline isomerase Pin1. Heteronuclear single quantum coherence (HSQC) NMR was then used to map out the binding surface, and structural analyses were used to identify key binding residues of Ki67 FHA. The results represent the first structural characterization of the complex of an FHA domain with a biologically relevant target protein fragment. Detailed analyses of the results led us to propose that three major factors control the interaction of FHA with its target protein: the pT residue, +1 to +3 residues, and an extended binding surface, and that variation in the three factors is the likely cause of the great diversity in the function and specificity of FHA domains from different sources.


    Organizational Affiliation

    Department of Biochemistry and Chemistry, Campus Chemical Instrument Center, The Ohio State University, Columbus, OH 43210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen Ki-67
A
128Homo sapiensMutation(s): 0 
Gene Names: MKI67
Find proteins for P46013 (Homo sapiens)
Go to Gene View: MKI67
Go to UniProtKB:  P46013
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 23 
  • Selection Criteria: structures with the lowest energy,target function 
  • Olderado: 1R21 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance