2apo

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[[Image:2apo.gif|left|200px]]
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{{STRUCTURE_2apo| PDB=2apo | SCENE= }}
{{STRUCTURE_2apo| PDB=2apo | SCENE= }}
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'''Crystal Structure of the Methanococcus jannaschii Cbf5 Nop10 Complex'''
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===Crystal Structure of the Methanococcus jannaschii Cbf5 Nop10 Complex===
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==Overview==
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Box H/ACA ribonucleoprotein particles (RNPs) catalyze RNA pseudouridylation and direct processing of ribosomal RNA, and are essential architectural components of vertebrate telomerases. H/ACA RNPs comprise four proteins and a multihelical RNA. Two proteins, Cbf5 and Nop10, suffice for basal enzymatic activity in an archaeal in vitro system. We now report their cocrystal structure at 1.95-A resolution. We find that archaeal Cbf5 can assemble with yeast Nop10 and with human telomerase RNA, consistent with the high sequence identity of the RNP components between archaea and eukarya. Thus, the Cbf5-Nop10 architecture is phylogenetically conserved. The structure shows how Nop10 buttresses the active site of Cbf5, and it reveals two basic troughs that bidirectionally extend the active site cleft. Mutagenesis results implicate an adjacent basic patch in RNA binding. This tripartite RNA-binding surface may function as a molecular bracket that organizes the multihelical H/ACA and telomerase RNAs.
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(as it appears on PubMed at http://www.pubmed.gov), where 16286935 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16286935}}
==About this Structure==
==About this Structure==
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[[Category: Snornp]]
[[Category: Snornp]]
[[Category: Zinc ribbon]]
[[Category: Zinc ribbon]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:19:21 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 10:06:04 2008''

Revision as of 07:06, 28 July 2008

Image:2apo.png

Template:STRUCTURE 2apo

Crystal Structure of the Methanococcus jannaschii Cbf5 Nop10 Complex

Template:ABSTRACT PUBMED 16286935

About this Structure

2APO is a Protein complex structure of sequences from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA.

Reference

The Cbf5-Nop10 complex is a molecular bracket that organizes box H/ACA RNPs., Hamma T, Reichow SL, Varani G, Ferre-D'Amare AR, Nat Struct Mol Biol. 2005 Dec;12(12):1101-7. Epub 2005 Nov 15. PMID:16286935

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