Structural highlights
4v53 is a 20 chain structure with sequence from Escherichia coli. This structure supersedes the now removed PDB entries 2qb9, 2qba, 2qbb and 2qbc. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Method: | X-ray diffraction, Resolution 3.54Å |
| Ligands: | , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
RS3_ECOLI Binds the lower part of the 30S subunit head. Binds mRNA in the 70S ribosome, positioning it for translation (By similarity).[1] Plays a role in mRNA unwinding by the ribosome, possibly by forming part of a processivity clamp.[2]
Publication Abstract from PubMed
Aminoglycosides are widely used antibiotics that cause messenger RNA decoding errors, block mRNA and transfer RNA translocation, and inhibit ribosome recycling. Ribosome recycling follows the termination of protein synthesis and is aided by ribosome recycling factor (RRF) in bacteria. The molecular mechanism by which aminoglycosides inhibit ribosome recycling is unknown. Here we show in X-ray crystal structures of the Escherichia coli 70S ribosome that RRF binding causes RNA helix H69 of the large ribosomal subunit, which is crucial for subunit association, to swing away from the subunit interface. Aminoglycosides bind to H69 and completely restore the contacts between ribosomal subunits that are disrupted by RRF. These results provide a structural explanation for aminoglycoside inhibition of ribosome recycling.
Structural basis for aminoglycoside inhibition of bacterial ribosome recycling.,Borovinskaya MA, Pai RD, Zhang W, Schuwirth BS, Holton JM, Hirokawa G, Kaji H, Kaji A, Cate JH Nat Struct Mol Biol. 2007 Aug;14(8):727-32. Epub 2007 Jul 29. PMID:17660832[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Takyar S, Hickerson RP, Noller HF. mRNA helicase activity of the ribosome. Cell. 2005 Jan 14;120(1):49-58. PMID:15652481 doi:10.1016/j.cell.2004.11.042
- ↑ Takyar S, Hickerson RP, Noller HF. mRNA helicase activity of the ribosome. Cell. 2005 Jan 14;120(1):49-58. PMID:15652481 doi:10.1016/j.cell.2004.11.042
- ↑ Borovinskaya MA, Pai RD, Zhang W, Schuwirth BS, Holton JM, Hirokawa G, Kaji H, Kaji A, Cate JH. Structural basis for aminoglycoside inhibition of bacterial ribosome recycling. Nat Struct Mol Biol. 2007 Aug;14(8):727-32. Epub 2007 Jul 29. PMID:17660832 doi:http://dx.doi.org/10.1038/nsmb1271
