1g6x: Difference between revisions

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[[Image:1g6x.gif|left|200px]]
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[[Image:1g6x.png|left|200px]]


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{{STRUCTURE_1g6x|  PDB=1g6x  |  SCENE=  }}  
{{STRUCTURE_1g6x|  PDB=1g6x  |  SCENE=  }}  


'''ULTRA HIGH RESOLUTION STRUCTURE OF BOVINE PANCREATIC TRYPSIN INHIBITOR (BPTI) MUTANT WITH ALTERED BINDING LOOP SEQUENCE'''
===ULTRA HIGH RESOLUTION STRUCTURE OF BOVINE PANCREATIC TRYPSIN INHIBITOR (BPTI) MUTANT WITH ALTERED BINDING LOOP SEQUENCE===




==Overview==
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The crystal structure of a mutant of bovine pancreatic trypsin inhibitor has been refined to 0.86 A resolution using low-temperature synchrotron data. The variant contains three mutations in the binding loop (Thr11Ala, Pro13Ala, Lys15Arg) and an unrelated Met52Leu substitution. Refinement with anisotropic displacement parameters and with removal of main-chain stereochemical restraints converged with R = 0.1035. The use of full-matrix refinement provided an estimate of the variances in the derived parameters. Some stereochemical parameters, such as the planarity of the peptide group and the value of the N-C(alpha)-C angle, show a wide spread, suggesting that the standard values used as restraints in protein structure refinements may not always be entirely appropriate. Comparison with the recently determined room-temperature structure of the same mutant at 1.42 A resolution confirms the previous observations and provides new details, such as a double conformation of the main chain at Leu29 and at Gly56-Gly57, a high proportion (over 20%) of residues in double conformations, correlation of disorder through lattice contacts and the positions of H atoms, including those in water molecules, and their involvement in C-H...O and N-H...pi hydrogen bonds.
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{{ABSTRACT_PUBMED_11320305}}


==About this Structure==
==About this Structure==
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[[Category: Otlewski, J.]]
[[Category: Otlewski, J.]]
[[Category: Serine protease inhibitor]]
[[Category: Serine protease inhibitor]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:13:00 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 04:47:54 2008''

Revision as of 01:47, 1 July 2008

File:1g6x.png

Template:STRUCTURE 1g6x

ULTRA HIGH RESOLUTION STRUCTURE OF BOVINE PANCREATIC TRYPSIN INHIBITOR (BPTI) MUTANT WITH ALTERED BINDING LOOP SEQUENCE

Template:ABSTRACT PUBMED 11320305

About this Structure

1G6X is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.

Reference

Ultrahigh-resolution structure of a BPTI mutant., Addlagatta A, Krzywda S, Czapinska H, Otlewski J, Jaskolski M, Acta Crystallogr D Biol Crystallogr. 2001 May;57(Pt 5):649-63. Epub 2001, Apr 24. PMID:11320305

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