1g7r

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{{STRUCTURE_1g7r| PDB=1g7r | SCENE= }}
{{STRUCTURE_1g7r| PDB=1g7r | SCENE= }}
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'''X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B'''
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===X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B===
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==Overview==
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X-ray structures of the universal translation initiation factor IF2/eIF5B have been determined in three states: free enzyme, inactive IF2/eIF5B.GDP, and active IF2/eIF5B.GTP. The "chalice-shaped" enzyme is a GTPase that facilitates ribosomal subunit joining and Met-tRNA(i) binding to ribosomes in all three kingdoms of life. The conserved core of IF2/eIF5B consists of an N-terminal G domain (I) plus an EF-Tu-type beta barrel (II), followed by a novel alpha/beta/alpha-sandwich (III) connected via an alpha helix to a second EF-Tu-type beta barrel (IV). Structural comparisons reveal a molecular lever, which amplifies a modest conformational change in the Switch 2 region of the G domain induced by Mg(2+)/GTP binding over a distance of 90 A from the G domain active center to domain IV. Mechanisms of GTPase function and ribosome binding are discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 11114334 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11114334}}
==About this Structure==
==About this Structure==
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[[Category: Roll-Mecak, A.]]
[[Category: Roll-Mecak, A.]]
[[Category: Translational gtpase]]
[[Category: Translational gtpase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:14:55 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 04:50:46 2008''

Revision as of 01:50, 1 July 2008

Image:1g7r.png

Template:STRUCTURE 1g7r

X-RAY STRUCTURE OF TRANSLATION INITIATION FACTOR IF2/EIF5B

Template:ABSTRACT PUBMED 11114334

About this Structure

1G7R is a Single protein structure of sequence from Methanothermobacter thermautotrophicus. Full crystallographic information is available from OCA.

Reference

X-Ray structures of the universal translation initiation factor IF2/eIF5B: conformational changes on GDP and GTP binding., Roll-Mecak A, Cao C, Dever TE, Burley SK, Cell. 2000 Nov 22;103(5):781-92. PMID:11114334

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