1tpf

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[[Image:1tpf.gif|left|200px]]
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{{STRUCTURE_1tpf| PDB=1tpf | SCENE= }}
{{STRUCTURE_1tpf| PDB=1tpf | SCENE= }}
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'''COMPARISON OF THE STRUCTURES AND THE CRYSTAL CONTACTS OF TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE IN FOUR DIFFERENT CRYSTAL FORMS'''
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===COMPARISON OF THE STRUCTURES AND THE CRYSTAL CONTACTS OF TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE IN FOUR DIFFERENT CRYSTAL FORMS===
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==Overview==
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Triosephosphate isomerase (TIM) is a dimeric enzyme consisting of 2 identical subunits. Trypanosomal TIM can be crystallized in 4 different spacegroups: P2(1)2(1)2(1), C2(big cell), C2(small cell), and P1. The P1 crystal form only grows in the presence of 1.4 M DMSO; there are 2 DMSO binding sites per subunit. The structures have been refined at a resolution of 1.83 A, 2.10 A, 2.13 A, and 1.80 A, respectively. In the 4 different spacegroups the TIM subunit can be observed in the context of 7 different crystallographic environments. In the C2 cells, the dimer 2-fold axis coincides with a crystallographic 2-fold axis. The similarities and differences of the 7 subunits are discussed. In 6 subunits the flexible loop (loop 6) is open, whereas in the P2(1)2(1)2(1) cell, the flexible loop of subunit 2 is in an almost closed conformation. The crystal contacts in the 4 different crystal forms are predominantly generated by polar residues in loops. A statistical analysis of the residues involved in crystal contacts shows that, in particular, serines are frequently involved in these interactions; 19% of the exposed serines are involved in crystal contacts.
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(as it appears on PubMed at http://www.pubmed.gov), where 8061607 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8061607}}
==About this Structure==
==About this Structure==
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[[Category: Wierenga, R K.]]
[[Category: Wierenga, R K.]]
[[Category: Zeelen, J Ph.]]
[[Category: Zeelen, J Ph.]]
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Revision as of 22:31, 28 July 2008

Image:1tpf.png

Template:STRUCTURE 1tpf

COMPARISON OF THE STRUCTURES AND THE CRYSTAL CONTACTS OF TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE IN FOUR DIFFERENT CRYSTAL FORMS

Template:ABSTRACT PUBMED 8061607

About this Structure

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

Reference

Comparison of the structures and the crystal contacts of trypanosomal triosephosphate isomerase in four different crystal forms., Kishan KV, Zeelen JP, Noble ME, Borchert TV, Wierenga RK, Protein Sci. 1994 May;3(5):779-87. PMID:8061607

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