2gnt: Difference between revisions

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[[Image:2gnt.gif|left|200px]]
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{{STRUCTURE_2gnt|  PDB=2gnt  |  SCENE=  }}  
{{STRUCTURE_2gnt|  PDB=2gnt  |  SCENE=  }}  


'''EDTA treated P. angolensis lectin (PAL) remetallized with calcium (1 hour treatment)'''
===EDTA treated P. angolensis lectin (PAL) remetallized with calcium (1 hour treatment)===




==Overview==
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The interplay between metal binding, carbohydrate binding activity, stability and structure of the lectin from Pterocarpus angolensis was investigated. Removal of the metals leads to a more flexible form of the protein with significantly less conformational stability. Crystal structures of this metal-free form show significant structural rearrangements, although some structural features that allow the binding of sugars are retained. We propose that substitution of an asparagine residue at the start of the C-terminal beta-strand of the legume lectin monomer hinders the trans-isomerization of the cis-peptide bond upon demetallization and constitutes an intramolecular switch governing the isomer state of the non-proline bond and ultimately the lectin phenotype.
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==About this Structure==
==About this Structure==
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[[Category: Pal]]
[[Category: Pal]]
[[Category: Remetallization]]
[[Category: Remetallization]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 06:52:43 2008''

Revision as of 06:52, 29 July 2008

File:2gnt.png

Template:STRUCTURE 2gnt

EDTA treated P. angolensis lectin (PAL) remetallized with calcium (1 hour treatment)EDTA treated P. angolensis lectin (PAL) remetallized with calcium (1 hour treatment)

Template:ABSTRACT PUBMED 16824540

About this StructureAbout this Structure

2GNT is a Single protein structure of sequence from Pterocarpus angolensis. Full crystallographic information is available from OCA.

ReferenceReference

Interplay between metal binding and cis/trans isomerization in legume lectins: structural and thermodynamic study of P. angolensis lectin., Garcia-Pino A, Buts L, Wyns L, Loris R, J Mol Biol. 2006 Aug 4;361(1):153-67. Epub 2006 Jun 21. PMID:16824540

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