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Protein structures in solution by nuclear-magnetic-resonance and distance geometry - the polypeptide fold of the basic pancreatic trypsin-inhibitor determined using 2 different algorithms, disgeo and disman

Academic Article
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Overview

authors

  • Wagner, G.
  • Braun, W.
  • Havel, T. F.
  • Schaumann, T.
  • Go, N.
  • Wuthrich, Kurt

publication date

  • August 1987

journal

  • Journal of Molecular Biology  Journal

abstract

  • A set of conformational restraints derived from nuclear magnetic resonance (n.m.r.) measurements on solutions of the basic pancreatic trypsin inhibitor (BPTI) was used as input for distance geometry calculations with the programs DISGEO and DISMAN. Five structures obtained with each of these algorithms were systematically compared among themselves and with the crystal structure of BPTI. It is clear that the protein architecture observed in single crystals of BPTI is largely preserved in aqueous solution, with local structural differences mainly confined to the protein surface. The results confirm that protein conformations determined in solution by combined use of n.m.r. and distance geometry are a consequence of the experimental data and do not depend significantly on the algorithm used for the structure determination. The data obtained further provide an illustration that long intramolecular distances in proteins, which are comparable with the radius of gyration, are defined with high precision by relatively imprecise nuclear Overhauser enhancement measurements of a large number of much shorter distances.

subject areas

  • Algorithms
  • Amino Acid Sequence
  • Aprotinin
  • Magnetic Resonance Spectroscopy
  • Models, Molecular
  • Protein Conformation
  • Software
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Identity

International Standard Serial Number (ISSN)

  • 0022-2836

Digital Object Identifier (DOI)

  • 10.1016/0022-2836(87)90037-4

PubMed ID

  • 2445992
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Additional Document Info

start page

  • 611

end page

  • 639

volume

  • 196

issue

  • 3

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