4GPW

Crystal structure of the protozoal cytoplasmic ribosomal decoding site in complex with 6'-hydroxysisomicin (P21212 form)

4GPW の概要

• エントリーDOI: 10.2210/pdb4gpw/pdb
• 関連するPDBエントリー: 2F8U 2F8V 4GPX 4GPY
• 分子名称: RNA (5'-R(*UP*UP*GP*CP*GP*UP*CP*GP*CP*GP*CP*CP*GP*GP*CP*GP*AP*AP*GP*UP*CP*GP*C)-3'), (1S,2S,3R,4S,6R)-4,6-diamino-3-{[(2S,3R)-3-amino-6-(hydroxymethyl)-3,4-dihydro-2H-pyran-2-yl]oxy}-2-hydroxycyclohexyl 3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranoside (3 entities in total)
• 機能のキーワード: ribosome, aminoglycoside, rna-antibiotic complex, antiprotozoal activity, antibacterial activity, rna/antibiotic
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 15669.87

構造登録者

Kondo, J.,Koganei, M.,Maianti, J.P.,Ly, V.L.,Hanessian, S. (登録日: 2012-08-22, 公開日: 2013-04-03, 最終更新日: 2024-03-20)

主引用文献

Kondo, J.,Koganei, M.,Maianti, J.P.,Ly, V.L.,Hanessian, S.
Crystal structures of a bioactive 6'-hydroxy variant of sisomicin bound to the bacterial and protozoal ribosomal decoding sites
Chemmedchem, 8:733-739, 2013

PubMed Abstract: Parasitic infections recognized as neglected tropical diseases are a source of concern for several regions of the world. Aminoglycosides are potent antimicrobial agents that have been extensively studied by biochemical and structural studies in prokaryotes. However, the molecular mechanism of their potential antiprotozoal activity is less well understood. In the present study, we have examined the in vitro inhibitory activities of some aminoglycosides with a 6'-hydroxy group on ring I and highlight that one of them, 6'-hydroxysisomicin, exhibits promising activity against a broad range of protozoan parasites. Furthermore, we have conducted X-ray analyses of 6'-hydroxysisomicin bound to the target ribosomal RNA A-sites in order to understand the mechanisms of both its antibacterial and antiprotozoal activities at the molecular level. The unsaturated ring I of 6'-hydroxysisomicin can directly stack on G1491, which is highly conserved in bacterial and protozoal species, through π-π interaction and fits closer to the guanidine base than the typically saturated and hydroxylated ring I of other structurally related aminoglycosides. Consequently, the compound adopts a lower energy conformation within the bacterial and protozoal A-sites and makes pseudo pairs to either A or G at position 1408. The A-site-selective binding mode strongly suggests that 6'-hydroxysisomicin is a potential lead for the design of next-generation aminoglycosides targeting a wide variety of infectious diseases.

PubMed: 23436717
DOI: 10.1002/cmdc.201200579

実験手法

X-RAY DIFFRACTION (3 Å)