1FI6

SOLUTION STRUCTURE OF THE REPS1 EH DOMAIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the Reps1 EH domain and characterization of its binding to NPF target sequences.

Kim, S.Cullis, D.N.Feig, L.A.Baleja, J.D.

(2001) Biochemistry 40: 6776-6785


  • PubMed Abstract: 
  • The recently described EH domain recognizes proteins containing Asn-Pro-Phe (NPF) sequences. Using nuclear magnetic resonance (NMR) data, we determined the solution structure of the EH domain from the Reps1 protein and characterized its binding to li ...

    The recently described EH domain recognizes proteins containing Asn-Pro-Phe (NPF) sequences. Using nuclear magnetic resonance (NMR) data, we determined the solution structure of the EH domain from the Reps1 protein and characterized its binding to linear and cyclic peptides derived from a novel targeting protein. The structure calculation included 1143 distance restraints and 122 angle restraints and resulted in structures with a root-mean-square deviation of 0.40 +/- 0.05 A for backbone atoms of superimposed secondary structural elements. The structure comprises two helix-loop-helix motifs characteristic of EF-hand domains. Titration data with NPF-containing peptides showed evidence of intermediate exchange on the NMR chemical shift time scale, which required an analysis that includes curve fitting to obtain accurate equilibrium constants and dissociation rate constants. The cyclic and linear peptides bound with similar affinities (Kd = 65 +/- 17 and 46 +/- 14 microM, respectively) and to the same hydrophobic pocket formed between helices B and C. The cyclic peptide formed a complex that dissociated more slowly (k(off) = 440 +/- 110 s(-1)) than the linear peptide (k(off) = 1800 +/- 250 s(-1)), but had little change in affinity because of the slower rate of association of the cyclic peptide. In addition, we characterized binding to a peptide containing a DPF sequence (Kd = 0.5 +/- 0.2 mM). The characterization of binding between the Reps1 EH domain and its target proteins provides information about their role in endocytosis.


    Related Citations: 
    • Chapter 3: Studies of Protein Structure and Interaction using Nuclear Magnetic Resonance Spectroscopy:Applications to the Reps1 EH Domain and MicrocinB17 Propeptide
      Kim, S.
      (2000) Thesis --: --


    Organizational Affiliation

    Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Avenue, Boston, Massachusetts 02111, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EH DOMAIN PROTEIN REPS1
A
92Mus musculusGene Names: Reps1
Find proteins for O54916 (Mus musculus)
Go to UniProtKB:  O54916
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1FI6 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2000-08-03 
  • Released Date: 2001-07-18 
  • Deposition Author(s): Kim, S., Baleja, J.D.

Revision History 

  • Version 1.0: 2001-07-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance