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1pnx
From Proteopedia
Contents |
Crystal Structure of the Wild Type Ribosome from E. Coli, 30S Subunit of 70S Ribosome. THIS FILE, 1PNX, CONTAINS ONLY MOLECULES OF THE 30S RIBOSOMAL SUBUNIT. THE 50S SUBUNIT IS IN THE PDB FILE 1PNY.
Protein biosynthesis on the ribosome requires accurate reading of the genetic code in mRNA. Two conformational rearrangements in the small ribosomal subunit, a closing of the head and body around the incoming tRNA and an RNA helical switch near the mRNA decoding site, have been proposed to select for complementary base-pairing between mRNA codons and tRNA anticodons. We determined x-ray crystal structures of the WT and a hyper-accurate variant of the Escherichia coli ribosome at resolutions of 10 and 9 A, respectively, revealing that formation of the intact 70S ribosome from its two subunits closes the conformation of the head of the small subunit independent of mRNA decoding. Moreover, no change in the conformation of the switch helix is observed in two steps of tRNA discrimination. These 70S ribosome structures indicate that mRNA decoding is coupled primarily to movement of the small subunit body, consistent with previous proposals, whereas closing of the head and the helical switch may function in other steps of protein synthesis.
X-ray crystal structures of the WT and a hyper-accurate ribosome from Escherichia coli., Vila-Sanjurjo A, Ridgeway WK, Seymaner V, Zhang W, Santoso S, Yu K, Cate JH, Proc Natl Acad Sci U S A. 2003 Jul 22;100(15):8682-7. Epub 2003 Jul 9. PMID:12853578
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1pnx is a 20 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA.
See Also
- Ribosomal protein S10
- Ribosomal protein S11
- Ribosomal protein S12
- Ribosomal protein S13
- Ribosomal protein S14
- Ribosomal protein S15
- Ribosomal protein S16
- Ribosomal protein S17
- Ribosomal protein S18
- Ribosomal protein S19
- Ribosomal protein S2
- Ribosomal protein S20
- Ribosomal protein S3
- Ribosomal protein S4
- Ribosomal protein S5
- Ribosomal protein S6
- Ribosomal protein S7
- Ribosomal protein S8
- Ribosomal protein S9
Reference
- Vila-Sanjurjo A, Ridgeway WK, Seymaner V, Zhang W, Santoso S, Yu K, Cate JH. X-ray crystal structures of the WT and a hyper-accurate ribosome from Escherichia coli. Proc Natl Acad Sci U S A. 2003 Jul 22;100(15):8682-7. Epub 2003 Jul 9. PMID:12853578 doi:10.1073/pnas.1133380100
