1BUS

SOLUTION CONFORMATION OF PROTEINASE INHIBITOR IIA FROM BULL SEMINAL PLASMA BY 1H NUCLEAR MAGNETIC RESONANCE AND DISTANCE GEOMETRY


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution conformation of proteinase inhibitor IIA from bull seminal plasma by 1H nuclear magnetic resonance and distance geometry.

Williamson, M.P.Havel, T.F.Wuthrich, K.

(1985) J.Mol.Biol. 182: 295-315

  • Primary Citation of Related Structures:  2BUS

  • PubMed Abstract: 
  • A determination of the solution conformation of the proteinase inhibitor IIA from bull seminal plasma (BUSI IIA) is described. Two-dimensional nuclear Overhauser enhancement spectroscopy (NOESY) was used to obtain a list of 202 distance constraints b ...

    A determination of the solution conformation of the proteinase inhibitor IIA from bull seminal plasma (BUSI IIA) is described. Two-dimensional nuclear Overhauser enhancement spectroscopy (NOESY) was used to obtain a list of 202 distance constraints between individually assigned hydrogen atoms of the polypeptide chain, to identify the positions of the three disulfide bridges, and to locate the single cis peptide bond. Supplementary geometric constraints were derived from the vicinal spin-spin couplings and the locations of certain hydrogen bonds, as determined by nuclear magnetic resonance (n.m.r.). Using a new distance geometry program (DISGEO) which is capable of computing all-atom structures for proteins the size of BUSI IIA, five conformers were computed from the NOE distance constraints alone, and another five were computed with the supplementary constraints included. Comparison of the different structures computed from the n.m.r. data among themselves and with the crystal structures of two homologous proteins shows that the global features of the conformation of BUSI IIA (i.e. the overall dimensions of the molecule and the threading of the polypeptide chain) were well-defined by the available n.m.r. data. In the Appendix, we describe a preliminary energy refinement of the structure, which showed that the constraints derived from the n.m.r. data are compatible with a low energy spatial structure.


    Related Citations: 
    • Assignment of the 1H Nuclear Magnetic Resonance Spectrum of the Proteinase Inhibitor IIA from Bull Seminal Plasma by Two-Dimensional Nuclear Magnetic Resonance at 500 Mhz
      Strop, P.,Wider, G.,Wuthrich, K.
      (1983) J.Mol.Biol. 166: 641
    • Characterization of the Proteinase Inhibitor IIA from Bull Seminal Plasma by 1H Nuclear Magnetic Resonance. Stability, Amide Proton Exchange and Mobility of Aromatic Residues
      Strop, P.,Wuthrich, K.
      (1983) J.Mol.Biol. 166: 631
    • Secondary Structure in the Solution Conformation of the Proteinase Inhibitor IIA from Bull Seminal Plasma by Nuclear Magnetic Resonance
      Williamson, M.P.,Marion, D.,Wuthrich, K.
      (1984) J.Mol.Biol. 173: 341



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEINASE INHIBITOR IIA
A
57Bos taurusGene Names: SPINK6
Find proteins for P01001 (Bos taurus)
Go to Gene View: SPINK6
Go to UniProtKB:  P01001
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Olderado: 1BUS Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1991-04-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other