1SHP

THE NMR SOLUTION STRUCTURE OF A KUNITZ-TYPE PROTEINASE INHIBITOR FROM THE SEA ANEMONE STICHODACTYLA HELIANTHUS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The NMR solution structure of a Kunitz-type proteinase inhibitor from the sea anemone Stichodactyla helianthus.

Antuch, W.Berndt, K.D.Chavez, M.A.Delfin, J.Wuthrich, K.

(1993) Eur.J.Biochem. 212: 675-684


  • PubMed Abstract: 
  • The solution structure of a 55-amino-acid Kunitz-type proteinase inhibitor, ShPI, purified from the Caribbean sea anemone Stichodactyla helianthus, was determined by NMR spectroscopy. Nearly complete sequence-specific 1H-NMR assignments were obtained ...

    The solution structure of a 55-amino-acid Kunitz-type proteinase inhibitor, ShPI, purified from the Caribbean sea anemone Stichodactyla helianthus, was determined by NMR spectroscopy. Nearly complete sequence-specific 1H-NMR assignments were obtained at pH 4.6 and 36 degrees C, and stereo-specific assignments were determined for 23 pairs of diastereotopic substituents. A data set of 666 upper distance limit constraints and 122 dihedral angle constraints collected on this basis was used as input for a structure calculation with the program DIANA. Following energy minimization with the program OPAL, the average root-mean-square diviation (RMSD) of the 20 DIANA conformers used to represent the solution structure relative to the mean structure is 61 pm for all backbone atoms N, C alpha and C', and 106 pm for all heavy atoms of residues 2-53. This high-quality solution structure of ShPI has a nearly identical molecular architecture as the bovine pancreatic trypsin inhibitor (BPTI), despite a mere 35% of sequence similarity between the two proteins. Exchange rates measured for 48 out of the 51 backbone amide protons showed that the positions of 20 slowly exchanging amide protons correlate well with hydrogen bonds involving these protons in the energy-minimized solution structure. The solution structure of ShPI is compared to the four homologous proteins for which the three-dimensional structure is also available.


    Related Citations: 
    • Amino Acid Sequence and Three-Dimensional Model of a Serine Proteinase Inhibitor from Stichodactyla Helianthus
      Antuch, W.,Dominguez, R.,Rodriguez, R.,Delfin, J.,Morera, V.,Diaz, J.,Chavez, M.,Dideberg, O.,Padron, G.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    Institut für Molekularbiologie and Biophysik, Eidgenössische Technische Hochschule-Hönggerberg, Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPSIN INHIBITOR
A
55Stichodactyla helianthusMutation(s): 0 
Find proteins for P31713 (Stichodactyla helianthus)
Go to UniProtKB:  P31713
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1SHP Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance