2i82: Difference between revisions
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[[Image:2i82.gif|left|200px]] | [[Image:2i82.gif|left|200px]] | ||
'''Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure''' | {{Structure | ||
|PDB= 2i82 |SIZE=350|CAPTION= <scene name='initialview01'>2i82</scene>, resolution 2.05Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=FOU:(5S,6R)-5-FLUORO-6-HYDROXYDIHYDROPYRIMIDINE-2,4(1H,3H)-DIONE'>FOU</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Pseudouridylate_synthase Pseudouridylate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.70 4.2.1.70] | |||
|GENE= rluA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |||
}} | |||
'''Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2I82 is a [ | 2I82 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I82 OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure., Hoang C, Chen J, Vizthum CA, Kandel JM, Hamilton CS, Mueller EG, Ferre-D'Amare AR, Mol Cell. 2006 Nov 17;24(4):535-45. PMID:[http:// | Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure., Hoang C, Chen J, Vizthum CA, Kandel JM, Hamilton CS, Mueller EG, Ferre-D'Amare AR, Mol Cell. 2006 Nov 17;24(4):535-45. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17188032 17188032] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Pseudouridylate synthase]] | [[Category: Pseudouridylate synthase]] | ||
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[[Category: pseudouridine synthase]] | [[Category: pseudouridine synthase]] | ||
''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 17:26:32 2008'' | ||
Revision as of 18:26, 20 March 2008
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| , resolution 2.05Å | |||||||
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| Ligands: | |||||||
| Gene: | rluA (Escherichia coli) | ||||||
| Activity: | Pseudouridylate synthase, with EC number 4.2.1.70 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure
OverviewOverview
RluA is a dual-specificity enzyme responsible for pseudouridylating 23S rRNA and several tRNAs. The 2.05 A resolution structure of RluA bound to a substrate RNA comprising the anticodon stem loop of tRNA(Phe) reveals that enzyme binding induces a dramatic reorganization of the RNA. Instead of adopting its canonical U turn conformation, the anticodon loop folds into a new structure with a reverse-Hoogsteen base pair and three flipped-out nucleotides. Sequence conservation, the cocrystal structure, and the results of structure-guided mutagenesis suggest that RluA recognizes its substrates indirectly by probing RNA loops for their ability to adopt the reorganized fold. The planar, cationic side chain of an arginine intercalates between the reverse-Hoogsteen base pair and the bottom pair of the anticodon stem, flipping the nucleotide to be modified into the active site of RluA. Sequence and structural comparisons suggest that pseudouridine synthases of the RluA, RsuA, and TruA families employ an equivalent arginine for base flipping.
About this StructureAbout this Structure
2I82 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of pseudouridine synthase RluA: indirect sequence readout through protein-induced RNA structure., Hoang C, Chen J, Vizthum CA, Kandel JM, Hamilton CS, Mueller EG, Ferre-D'Amare AR, Mol Cell. 2006 Nov 17;24(4):535-45. PMID:17188032
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