1ipa: Difference between revisions

Revision as of 13:44, 1 July 2008

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File:1ipa.png

Template:STRUCTURE 1ipa

CRYSTAL STRUCTURE OF RNA 2'-O RIBOSE METHYLTRANSFERASECRYSTAL STRUCTURE OF RNA 2'-O RIBOSE METHYLTRANSFERASE

Template:ABSTRACT PUBMED 12077432

About this StructureAbout this Structure

1IPA is a Single protein structure of sequence from Thermus thermophilus. Full crystallographic information is available from OCA.

ReferenceReference

An enzyme with a deep trefoil knot for the active-site architecture., Nureki O, Shirouzu M, Hashimoto K, Ishitani R, Terada T, Tamakoshi M, Oshima T, Chijimatsu M, Takio K, Vassylyev DG, Shibata T, Inoue Y, Kuramitsu S, Yokoyama S, Acta Crystallogr D Biol Crystallogr. 2002 Jul;58(Pt 7):1129-37. Epub 2002, Jun 20. PMID:12077432

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OCA

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-'''CRYSTAL STRUCTURE OF RNA 2'-O RIBOSE METHYLTRANSFERASE'''
+===CRYSTAL STRUCTURE OF RNA 2'-O RIBOSE METHYLTRANSFERASE===
-==Overview==
+<!--
-Knots in polypeptide chains have been found in very few proteins. Only two proteins are considered to have a shallow 'trefoil' knot, which tucks a few residues at one end of the chain through a loop exposed on the protein surface. Recently, another protein was found by a mathematical algorithm to have a deep 'figure-of-eight' knot which had not been visually identified. In the present study, the crystal structure of a hypothetical RNA 2'-O-ribose methyltransferase from Thermus thermophilus (RrmA) was determined at 2.4 A resolution and a deep trefoil knot was found for the first time. The present knot is formed by the threading of a 44-residue polypeptide chain through a 41-residue loop and is better defined than the previously reported knots. Two of the three catalytic residues conserved in the 2'-O-ribose methyltransferase family are located in the knotting loop and in the knotted carboxy-terminal chain, which is the first observation that the enzyme active site is constructed right on the knot. On the other hand, the amino-terminal domain exhibits a geometrical similarity to the ribosomal proteins which recognize an internal loop of RNA.
+The line below this paragraph, {{ABSTRACT_PUBMED_12077432}}, adds the Publication Abstract to the page
+(as it appears on PubMed at http://www.pubmed.gov), where 12077432 is the PubMed ID number.
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+{{ABSTRACT_PUBMED_12077432}}
 ==About this Structure==
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 [[Category: Rsgi]]
 [[Category: Structural genomic]]
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