1kc8

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{{STRUCTURE_1kc8| PDB=1kc8 | SCENE= }}
{{STRUCTURE_1kc8| PDB=1kc8 | SCENE= }}
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'''Co-crystal Structure of Blasticidin S Bound to the 50S Ribosomal Subunit'''
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===Co-crystal Structure of Blasticidin S Bound to the 50S Ribosomal Subunit===
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==Overview==
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Structures of anisomycin, chloramphenicol, sparsomycin, blasticidin S, and virginiamycin M bound to the large ribosomal subunit of Haloarcula marismortui have been determined at 3.0A resolution. Most of these antibiotics bind to sites that overlap those of either peptidyl-tRNA or aminoacyl-tRNA, consistent with their functioning as competitive inhibitors of peptide bond formation. Two hydrophobic crevices, one at the peptidyl transferase center and the other at the entrance to the peptide exit tunnel play roles in binding these antibiotics. Midway between these crevices, nucleotide A2103 of H.marismortui (2062 Escherichia coli) varies in its conformation and thereby contacts antibiotics bound at either crevice. The aromatic ring of anisomycin binds to the active-site hydrophobic crevice, as does the aromatic ring of puromycin, while the aromatic ring of chloramphenicol binds to the exit tunnel hydrophobic crevice. Sparsomycin contacts primarily a P-site bound substrate, but also extends into the active-site hydrophobic crevice. Virginiamycin M occupies portions of both the A and P-site, and induces a conformational change in the ribosome. Blasticidin S base-pairs with the P-loop and thereby mimics C74 and C75 of a P-site bound tRNA.
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(as it appears on PubMed at http://www.pubmed.gov), where 12860128 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12860128}}
==About this Structure==
==About this Structure==
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[[Category: P-loop]]
[[Category: P-loop]]
[[Category: P-site]]
[[Category: P-site]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 22:34:04 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 10:07:06 2008''

Revision as of 07:07, 2 July 2008

Image:1kc8.png

Template:STRUCTURE 1kc8

Co-crystal Structure of Blasticidin S Bound to the 50S Ribosomal Subunit

Template:ABSTRACT PUBMED 12860128

About this Structure

1KC8 is a Protein complex structure of sequences from Haloarcula marismortui. Full crystallographic information is available from OCA.

Reference

Structures of five antibiotics bound at the peptidyl transferase center of the large ribosomal subunit., Hansen JL, Moore PB, Steitz TA, J Mol Biol. 2003 Jul 25;330(5):1061-75. PMID:12860128

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