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1va0

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{{STRUCTURE_1va0| PDB=1va0 | SCENE= }}
{{STRUCTURE_1va0| PDB=1va0 | SCENE= }}
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'''Crystal Structure of the Native Form of Uroporphyrin III C-methyl transferase from Thermus thermophilus'''
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===Crystal Structure of the Native Form of Uroporphyrin III C-methyl transferase from Thermus thermophilus===
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==Overview==
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Uroporphyrinogen-III C-methyltransferase from Thermus thermophilus is a multifunctional protein responsible for two of the eight S-adenosyl-methionine-dependent methylations of the corrin ring during vitamin B(12) synthesis. The structure of this protein has been solved to 2.0 A resolution in both the apo and cofactor-bound form. The monomer consists of two domains, A and B, each consisting of a five-stranded beta-sheet and two or three alpha-helices, with the cofactor bound at the interface. The biological unit is the dimer found in the asymmetric unit. This dimer is related by a non-crystallographic twofold such that two B domains combine to form a long ten-stranded beta-sheet. When compared with solved related structures, this structure shows clear differences in the region involved in cofactor and substrate binding, affirming the role of several previously implicated residues and questioning others. The solved related structures are characterized by an exposed active site. The T. thermophilus structure has this site restricted by the interaction of a flexible loop structure with a highly conserved residue, suggesting a mechanistic role. This structure represents the ;closed' form of the protein.
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(as it appears on PubMed at http://www.pubmed.gov), where 15983414 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15983414}}
==About this Structure==
==About this Structure==
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[[Category: Structural genomic]]
[[Category: Structural genomic]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 12:17:10 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 16:13:16 2008''

Revision as of 13:13, 27 July 2008

Image:1va0.png

Template:STRUCTURE 1va0

Crystal Structure of the Native Form of Uroporphyrin III C-methyl transferase from Thermus thermophilus

Template:ABSTRACT PUBMED 15983414

About this Structure

1VA0 is a Single protein structure of sequence from Thermus thermophilus. Full crystallographic information is available from OCA.

Reference

Structure of a closed-form uroporphyrinogen-III C-methyltransferase from Thermus thermophilus., Rehse PH, Kitao T, Tahirov TH, Acta Crystallogr D Biol Crystallogr. 2005 Jul;61(Pt 7):913-9. Epub 2005, Jun 24. PMID:15983414

Page seeded by OCA on Sun Jul 27 16:13:16 2008

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