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1w94

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{{STRUCTURE_1w94| PDB=1w94 | SCENE= }}
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'''CRYSTAL STRUCTURE OF MIL (MTH680), AN ARCHAEAL IMP4-LIKE PROTEIN'''
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===CRYSTAL STRUCTURE OF MIL (MTH680), AN ARCHAEAL IMP4-LIKE PROTEIN===
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==Overview==
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Proteins of the Imp4/Brix superfamily are involved in ribosomal RNA processing, an essential function in all cells. We report the first structure of an Imp4/Brix superfamily protein, the Mil (for Methanothermobacter thermautotrophicus Imp4-like) protein (gene product Mth680), from the archaeon M. thermautotrophicus. The amino- and carboxy-terminal halves of Mil show significant structural similarity to one another, suggesting an origin by means of an ancestral duplication. Both halves show the same fold as the anticodon-binding domain of class IIa aminoacyl-tRNA synthetases, with greater conservation seen in the N-terminal half. This structural similarity, together with the charge distribution in Mil, suggests that Imp4/Brix superfamily proteins could bind single-stranded segments of RNA along a concave surface formed by the N-terminal half of their beta-sheet and a central alpha-helix. The crystal structure of Mil is incompatible with the presence, in the Imp4/Brix domain, of a helix-turn-helix motif that was proposed to comprise the RNA-binding moiety of the Imp4/Brix proteins.
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{{ABSTRACT_PUBMED_15654320}}
==About this Structure==
==About this Structure==
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[[Category: Imp4 domain]]
[[Category: Imp4 domain]]
[[Category: Rna-binding protein]]
[[Category: Rna-binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 13:19:42 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 16:12:21 2008''

Revision as of 13:12, 29 July 2008

Template:STRUCTURE 1w94

CRYSTAL STRUCTURE OF MIL (MTH680), AN ARCHAEAL IMP4-LIKE PROTEIN

Template:ABSTRACT PUBMED 15654320

About this Structure

1W94 is a Single protein structure of sequence from Methanothermobacter thermautotrophicus. Full crystallographic information is available from OCA.

Reference

Crystal structure of Mil (Mth680): internal duplication and similarity between the Imp4/Brix domain and the anticodon-binding domain of class IIa aminoacyl-tRNA synthetases., Ng CL, Waterman D, Koonin EV, Antson AA, Ortiz-Lombardia M, EMBO Rep. 2005 Feb;6(2):140-6. PMID:15654320

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