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1pnu

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{{STRUCTURE_1pnu| PDB=1pnu | SCENE= }}
{{STRUCTURE_1pnu| PDB=1pnu | SCENE= }}
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'''Crystal Structure of a Streptomycin Dependent Ribosome from Escherichia Coli, 50S Subunit of 70S Ribosome. THIS FILE, 1PNU, CONTAINS ONLY MOLECULES OF THE 50S RIBOSOMAL SUBUNIT. THE 30S SUBUNIT, MRNA, P-SITE TRNA, AND A-SITE TRNA ARE IN THE PDB FILE 1PNS.'''
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===Crystal Structure of a Streptomycin Dependent Ribosome from Escherichia Coli, 50S Subunit of 70S Ribosome. THIS FILE, 1PNU, CONTAINS ONLY MOLECULES OF THE 50S RIBOSOMAL SUBUNIT. THE 30S SUBUNIT, MRNA, P-SITE TRNA, AND A-SITE TRNA ARE IN THE PDB FILE 1PNS.===
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==Overview==
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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.
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(as it appears on PubMed at http://www.pubmed.gov), where 12853578 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12853578}}
==About this Structure==
==About this Structure==
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[[Category: Protein-rna complex]]
[[Category: Protein-rna complex]]
[[Category: Rna-rna complex]]
[[Category: Rna-rna complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 14:45:02 2008''

Revision as of 11:45, 27 July 2008

Image:1pnu.png

Template:STRUCTURE 1pnu

Crystal Structure of a Streptomycin Dependent Ribosome from Escherichia Coli, 50S Subunit of 70S Ribosome. THIS FILE, 1PNU, CONTAINS ONLY MOLECULES OF THE 50S RIBOSOMAL SUBUNIT. THE 30S SUBUNIT, MRNA, P-SITE TRNA, AND A-SITE TRNA ARE IN THE PDB FILE 1PNS.

Template:ABSTRACT PUBMED 12853578

About this Structure

Full crystallographic information is available from OCA.

Reference

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

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