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1ag1

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{{STRUCTURE_1ag1| PDB=1ag1 | SCENE= }}
{{STRUCTURE_1ag1| PDB=1ag1 | SCENE= }}
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'''MONOHYDROGEN PHOSPHATE BINDING TO TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE'''
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===MONOHYDROGEN PHOSPHATE BINDING TO TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE===
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==Overview==
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The three-dimensional structure of triosephosphate isomerase complexed with the competitive inhibitor SO-4(2) was determined by X-ray crystallography to a resolution of 0.24 nm. A comparison with the native crystal structure, where SO-4(2) is bound, revealed five changes: (a) a 0.10-nm shift of the anion-binding site; (b) a further closing of the flexible loop of the enzyme; (c) a 'swinging in' of the side chain of the catalytic Glu, that is chi 1 changes from (+) to (-) synclinal; (d) an altered water structure; (e) a disappearance of the conformational heterogeneity at the C-terminus of strand beta 7. Some of these changes may be related to the different hydrogen-bond pattern about the two different anions. However, the distance of 0.10 nm between the sulphur and phosphorus positions is unexpected and remains intriguing.
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(as it appears on PubMed at http://www.pubmed.gov), where 2040290 is the PubMed ID number.
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{{ABSTRACT_PUBMED_2040290}}
==About this Structure==
==About this Structure==
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[[Category: Hol, W G.J.]]
[[Category: Hol, W G.J.]]
[[Category: Verlinde, C L.M J.]]
[[Category: Verlinde, C L.M J.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 10:13:16 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 16:46:15 2008''

Revision as of 13:46, 30 June 2008

Image:1ag1.png

Template:STRUCTURE 1ag1

MONOHYDROGEN PHOSPHATE BINDING TO TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE

Template:ABSTRACT PUBMED 2040290

About this Structure

1AG1 is a Single protein structure of sequence from Trypanosoma brucei. Full crystallographic information is available from OCA.

Reference

Anion binding at the active site of trypanosomal triosephosphate isomerase. Monohydrogen phosphate does not mimic sulphate., Verlinde CL, Noble ME, Kalk KH, Groendijk H, Wierenga RK, Hol WG, Eur J Biochem. 1991 May 23;198(1):53-7. PMID:2040290

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