1mme: Difference between revisions

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[[Image:1mme.jpg|left|200px]]
[[Image:1mme.png|left|200px]]


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==Overview==
{{ABSTRACT_7541315}}
We have solved the crystal structure of an all-RNA hammerhead ribozyme having a single 2'-O-methyl cytosine incorporated at the active site to prevent cleavage. The conditions used differ from those in another recent solution in four significant ways: first, it is an all-RNA ribozyme rather than a DNA-RNA hybrid; second, the connectivity of the ribozyme backbone strands is different; third, the crystals were grown in the presence of a much lower concentration of salt; and fourth, the crystal packing scheme is very different. Nevertheless, the three-dimensional structure of the all-RNA hammerhead ribozyme is similar to the previous structure. Five potential Mg(II)-binding sites are identified, including one positioned near the ribozyme catalytic pocket. Upon this basis, as well as upon comparisons with the metal-binding sites in the structurally homologous uridine turn of tRNAPhe, we propose a mechanism for RNA catalytic cleavage.


==About this Structure==
==About this Structure==
The following page contains interesting information on the relation of 1MME with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb65_1.html Self-splicing RNA]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MME OCA].  
The following page contains interesting information on the relation of 1MME with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb65_1.html Self-splicing RNA]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MME OCA].  
==Reference==
The crystal structure of an all-RNA hammerhead ribozyme: a proposed mechanism for RNA catalytic cleavage., Scott WG, Finch JT, Klug A, Cell. 1995 Jun 30;81(7):991-1002. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7541315 7541315]
[[Category: Self-splicing RNA]]
[[Category: Self-splicing RNA]]
[[Category: Finch, J T.]]
[[Category: Finch, J T.]]
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[[Category: Loop]]
[[Category: Loop]]
[[Category: Rna hammerhead ribozyme]]
[[Category: Rna hammerhead ribozyme]]
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Revision as of 17:43, 26 June 2008

File:1mme.png

Template:STRUCTURE 1mme

THE CRYSTAL STRUCTURE OF AN ALL-RNA HAMMERHEAD RIBOZYME: A PROPOSED MECHANISM FOR RNA CATALYTIC CLEAVAGE


Template:ABSTRACT 7541315

About this StructureAbout this Structure

The following page contains interesting information on the relation of 1MME with [Self-splicing RNA]. Full crystallographic information is available from OCA.

Page seeded by OCA on Thu Jun 26 17:43:05 2008

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