1EI0

NMR STRUCTURE OF THE ALPHA-HELICAL HAIRPIN OF P8MTCP1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Synthesis and NMR solution structure of an alpha-helical hairpin stapled with two disulfide bridges.

Barthe, P.Rochette, S.Vita, C.Roumestand, C.

(2000) Protein Sci. 9: 942-955

  • DOI: 10.1110/ps.9.5.942

  • PubMed Abstract: 
  • Helical coiled-coils and bundles are some of the most common structural motifs found in proteins. Design and synthesis of alpha-helical motifs may provide interesting scaffolds that can be useful as host structures to display functional sites, thus a ...

    Helical coiled-coils and bundles are some of the most common structural motifs found in proteins. Design and synthesis of alpha-helical motifs may provide interesting scaffolds that can be useful as host structures to display functional sites, thus allowing the engineering of novel functional miniproteins. We have synthesized a 38-amino acid peptide, alpha2p8, encompassing the alpha-helical hairpin present in the structure of p8MTCP1, as an alpha-helical scaffold particularly promising for its stability and permissiveness of sequence mutations. The three-dimensional structure of this peptide has been solved using homonuclear two-dimensional NMR techniques at 600 MHz. After sequence specific assignment, a total of 285 distance and 29 dihedral restraints were collected. The solution structure of alpha2p8 is presented as a set of 30 DIANA structures, further refined by restrained molecular dynamics, using simulated annealing protocol with the AMBER force field. The RMSD values for the backbone and all heavy atoms are 0.65+/-0.25 and 1.51+/-0.21 A, respectively. Excised from its protein context, the alpha-hairpin keeps its native structure: an alpha-helical coiled-coil, similar to that found in superhelical structures, with two helices spanning residues 4-16 and 25-36, and linked by a short loop. This motif is stabilized by two interhelical disulfide bridges and several hydrophobic interactions at the helix interface, leaving most of its solvent-exposed surface available for mutation. This alpha-helical hairpin, easily amenable to synthetic chemistry and biological expression system, may represent a stable and versatile scaffold to display new functional sites and peptide libraries.


    Organizational Affiliation

    Centre de Biochimie Structurale, CNRS-UMR 9955, INSERM-U414, Université de Montpellier I, Faculté de Pharmacie, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P8MTCP1
A
38Homo sapiensGene Names: CMC4 (C6.1B, MTCP1, MTCP1NB)
Find proteins for P56277 (Homo sapiens)
Go to Gene View: CMC4
Go to UniProtKB:  P56277
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance