2c5s: Difference between revisions

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[[Image:2c5s.gif|left|200px]]
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{{STRUCTURE_2c5s|  PDB=2c5s  |  SCENE=  }}  
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'''CRYSTAL STRUCTURE OF BACILLUS ANTHRACIS THII, A TRNA-MODIFYING ENZYME CONTAINING THE PREDICTED RNA-BINDING THUMP DOMAIN'''
===CRYSTAL STRUCTURE OF BACILLUS ANTHRACIS THII, A TRNA-MODIFYING ENZYME CONTAINING THE PREDICTED RNA-BINDING THUMP DOMAIN===




==Overview==
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ThiI is an enzyme responsible for the formation of the modified base S(4)U (4-thiouridine) found at position 8 in some prokaryotic tRNAs. This base acts as a sensitive trigger for the response mechanism to UV exposure, providing protection against its damaging effects. We present the crystal structure of Bacillus anthracis ThiI in complex with AMP, revealing an extended tripartite architecture in which an N-terminal ferredoxin-like domain (NFLD) connects the C-terminal catalytic PP-loop pyrophosphatase domain with a THUMP domain, an ancient predicted RNA-binding domain that is widespread in all kingdoms of life. We describe the structure of the THUMP domain, which appears to be unrelated to RNA-binding domains of known structure. Mapping the conserved residues of NFLD and the THUMP domain onto the ThiI structure suggests that these domains jointly form the tRNA-binding surface. The inaccessibility of U8 in the canonical L-shaped form of tRNA, and the existence of a glycine-rich linker joining the catalytic and RNA-binding moieties of ThiI suggest that structural changes may occur in both molecules upon binding.
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{{ABSTRACT_PUBMED_16343540}}


==About this Structure==
==About this Structure==
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[[Category: Thump domain]]
[[Category: Thump domain]]
[[Category: Trna modification]]
[[Category: Trna modification]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 14:47:12 2008''

Revision as of 11:47, 28 July 2008

File:2c5s.png

Template:STRUCTURE 2c5s

CRYSTAL STRUCTURE OF BACILLUS ANTHRACIS THII, A TRNA-MODIFYING ENZYME CONTAINING THE PREDICTED RNA-BINDING THUMP DOMAIN

Template:ABSTRACT PUBMED 16343540

About this Structure

2C5S is a Single protein structure of sequence from Bacillus anthracis. Full crystallographic information is available from OCA.

Reference

Crystal structure of Bacillus anthracis ThiI, a tRNA-modifying enzyme containing the predicted RNA-binding THUMP domain., Waterman DG, Ortiz-Lombardia M, Fogg MJ, Koonin EV, Antson AA, J Mol Biol. 2006 Feb 10;356(1):97-110. Epub 2005 Nov 22. PMID:16343540

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