2z2u
From Proteopedia
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| - | [[Image:2z2u.gif|left|200px]] | + | [[Image:2z2u.gif|left|200px]] |
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| - | '''Crystal structure of archaeal TYW1''' | + | {{Structure |
| + | |PDB= 2z2u |SIZE=350|CAPTION= <scene name='initialview01'>2z2u</scene>, resolution 2.40Å | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Crystal structure of archaeal TYW1''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2Z2U is a [ | + | 2Z2U is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Z2U OCA]. |
==Reference== | ==Reference== | ||
| - | Crystal structure of the radical SAM enzyme catalyzing tricyclic modified base formation in tRNA., Suzuki Y, Noma A, Suzuki T, Senda M, Senda T, Ishitani R, Nureki O, J Mol Biol. 2007 Oct 5;372(5):1204-14. Epub 2007 Jul 26. PMID:[http:// | + | Crystal structure of the radical SAM enzyme catalyzing tricyclic modified base formation in tRNA., Suzuki Y, Noma A, Suzuki T, Senda M, Senda T, Ishitani R, Nureki O, J Mol Biol. 2007 Oct 5;372(5):1204-14. Epub 2007 Jul 26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17727881 17727881] |
[[Category: Methanocaldococcus jannaschii]] | [[Category: Methanocaldococcus jannaschii]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: metal binding protein]] | [[Category: metal binding protein]] | ||
| - | ''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 18:51:31 2008'' |
Revision as of 16:51, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of archaeal TYW1
Overview
Wyosine and its derivatives, such as wybutosine, found in eukaryotic and archaeal tRNAs, are tricyclic hypermodified nucleosides. In eukaryotes, wybutosine exists exclusively in position 37, 3'-adjacent to the anticodon, of tRNA(Phe), where it ensures correct translation by stabilizing the codon-anticodon base-pairing during the ribosomal decoding process. Recent studies revealed that the wyosine biosynthetic pathway consists of multistep enzymatic reactions starting from a guanosine residue. Among these steps, TYW1 catalyzes the second step to form the tricyclic ring structure, by cyclizing N(1)-methylguanosine. In this study, we solved the crystal structure of TYW1 from Methanocaldococcus jannaschii at 2.4 A resolution. TYW1 assumes an incomplete TIM barrel with (alpha/beta)(6) topology, which closely resembles the reported structures of radical SAM enzymes. Hence, TYW1 was considered to catalyze the cyclization reaction by utilizing the radical intermediate. Comparison with other radical SAM enzymes allowed us to build a model structure complexed with S-adenosylmethionine and two [4Fe-4S] clusters. Mutational analyses in yeast supported the validity of this complex model structure, which provides a structural insight into the radical reaction involving two [4Fe-4S] clusters to create a complex tricyclic base.
About this Structure
2Z2U is a Single protein structure of sequence from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA.
Reference
Crystal structure of the radical SAM enzyme catalyzing tricyclic modified base formation in tRNA., Suzuki Y, Noma A, Suzuki T, Senda M, Senda T, Ishitani R, Nureki O, J Mol Biol. 2007 Oct 5;372(5):1204-14. Epub 2007 Jul 26. PMID:17727881
Page seeded by OCA on Thu Mar 20 18:51:31 2008
