1TUS

SOLUTION STRUCTURE OF REACTIVE-SITE HYDROLYZED TURKEY OVOMUCOID THIRD DOMAIN BY NUCLEAR MAGNETIC RESONANCE AND DISTANCE GEOMETRY METHODS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Solution structure of reactive-site hydrolyzed turkey ovomucoid third domain by nuclear magnetic resonance and distance geometry methods.

Walkenhorst, W.F.Krezel, A.M.Rhyu, G.I.Markley, J.L.

(1994) J Mol Biol 242: 215-230

  • DOI: 10.1006/jmbi.1994.1574
  • Primary Citation of Related Structures:  
    1TUS

  • PubMed Abstract: 
  • The solution structure of reactive-site hydrolyzed turkey ovomucoid third domain (OMTKY3*) was determined by n.m.r. methods. A total of 655 distance constraints was applied in a distance geometry/simulated annealing approach to calculate a family of ...

    The solution structure of reactive-site hydrolyzed turkey ovomucoid third domain (OMTKY3*) was determined by n.m.r. methods. A total of 655 distance constraints was applied in a distance geometry/simulated annealing approach to calculate a family of structures consistent with the n.m.r. data. The input data included 24 torsion angle constraints, 14 hydrogen bonds, 611 constraints derived from two-dimensional nuclear Overhauser enhancement spectroscopy data, and three disulfide bridges. Stereospecific assignments were included for the hydrogens of 26 beta-methylene groups and for seven isopropyl methyl groups (46% chiral assignments). OMTKY3* in solution retains the global fold and overall secondary structure of the intact inhibitor (OMTKY3) but exhibits local structural differences at and adjacent to the clip site. In particular, the hydrogen-bonding network observed at the reactive-site of the intact inhibitor is disrupted, and the position of Tyr20 is altered in the modified inhibitor. No evidence was found for ion pairing between the oppositely charged termini at the clip site. Surprisingly, in light of numerous changes indicating that OMTKY3* is less stable than OMTKY3, rotation of the Tyr31 ring was found to be slow in OMTKY3* at 30 degrees C. In OMTKY3, slow rotation of the Tyr31 ring was observed only at temperatures below 15 degrees C. The n.m.r. structures of OMTKY3* are compared here with the similarly calculated structures of OMTKY3. This represents the first comparison of an intact and modified (reactive-site clipped) proteinase inhibitor under identical conditions. On comparison with published X-ray structures of modified avian ovomucoid third domains from two other species, the present structure of OMTKY3* in solution was found to resemble that of the Japanese quail protein (OMJPQ3*) more closely than that of the more closely homologous silver pheasant protein (OMSVP3*).


    Organizational Affiliation

    Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison 53706.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
OVOMUCOIDA56Meleagris gallopavoMutation(s): 0 
Find proteins for P68390 (Meleagris gallopavo)
Explore P68390 
Go to UniProtKB:  P68390
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 
  • OLDERADO: 1TUS Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-10-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other