1kq2: Difference between revisions
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[[Image:1kq2.gif|left|200px]] | [[Image:1kq2.gif|left|200px]] | ||
'''Crystal Structure of an Hfq-RNA Complex''' | {{Structure | ||
|PDB= 1kq2 |SIZE=350|CAPTION= <scene name='initialview01'>1kq2</scene>, resolution 2.71Å | |||
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'''Crystal Structure of an Hfq-RNA Complex''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1KQ2 is a [ | 1KQ2 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KQ2 OCA]. | ||
==Reference== | ==Reference== | ||
Structures of the pleiotropic translational regulator Hfq and an Hfq-RNA complex: a bacterial Sm-like protein., Schumacher MA, Pearson RF, Moller T, Valentin-Hansen P, Brennan RG, EMBO J. 2002 Jul 1;21(13):3546-56. PMID:[http:// | Structures of the pleiotropic translational regulator Hfq and an Hfq-RNA complex: a bacterial Sm-like protein., Schumacher MA, Pearson RF, Moller T, Valentin-Hansen P, Brennan RG, EMBO J. 2002 Jul 1;21(13):3546-56. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12093755 12093755] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Staphylococcus aureus]] | [[Category: Staphylococcus aureus]] | ||
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[[Category: translational regulator]] | [[Category: translational regulator]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:20:42 2008'' | ||
Revision as of 13:20, 20 March 2008
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Crystal Structure of an Hfq-RNA Complex
OverviewOverview
In prokaryotes, Hfq regulates translation by modulating the structure of numerous RNA molecules by binding preferentially to A/U-rich sequences. To elucidate the mechanisms of target recognition and translation regulation by Hfq, we determined the crystal structures of the Staphylococcus aureus Hfq and an Hfq-RNA complex to 1.55 and 2.71 A resolution, respectively. The structures reveal that Hfq possesses the Sm-fold previously observed only in eukaryotes and archaea. However, unlike these heptameric Sm proteins, Hfq forms a homo-hexameric ring. The Hfq-RNA structure reveals that the single-stranded hepta-oligoribonucleotide binds in a circular conformation around a central basic cleft, whereby Tyr42 residues from adjacent subunits stack with six of the bases, and Gln8, outside the Sm motif, provides key protein-base contacts. Such binding suggests a mechanism for Hfq function.
About this StructureAbout this Structure
1KQ2 is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.
ReferenceReference
Structures of the pleiotropic translational regulator Hfq and an Hfq-RNA complex: a bacterial Sm-like protein., Schumacher MA, Pearson RF, Moller T, Valentin-Hansen P, Brennan RG, EMBO J. 2002 Jul 1;21(13):3546-56. PMID:12093755
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