2j8x

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[[Image:2j8x.jpg|left|200px]]
[[Image:2j8x.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 2j8x |SIZE=350|CAPTION= <scene name='initialview01'>2j8x</scene>, resolution 2.30&Aring;
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The line below this paragraph, containing "STRUCTURE_2j8x", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=AC1:Ure+Binding+Site+For+Chain+D'>AC1</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=URE:UREA'>URE</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Uridine_nucleosidase Uridine nucleosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.3 3.2.2.3] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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|DOMAIN=
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{{STRUCTURE_2j8x| PDB=2j8x | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2j8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2j8x OCA], [http://www.ebi.ac.uk/pdbsum/2j8x PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2j8x RCSB]</span>
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}}
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'''EPSTEIN-BARR VIRUS URACIL-DNA GLYCOSYLASE IN COMPLEX WITH UGI FROM PBS-2'''
'''EPSTEIN-BARR VIRUS URACIL-DNA GLYCOSYLASE IN COMPLEX WITH UGI FROM PBS-2'''
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[[Category: Geoui, T.]]
[[Category: Geoui, T.]]
[[Category: Tarbouriech, N.]]
[[Category: Tarbouriech, N.]]
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[[Category: dna repair]]
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[[Category: Dna repair]]
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[[Category: ebv]]
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[[Category: Ebv]]
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[[Category: epstein-barr virus]]
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[[Category: Epstein-barr virus]]
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[[Category: hydrolase/inhibitor complex]]
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[[Category: Hydrolase/inhibitor complex]]
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[[Category: lytic protein]]
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[[Category: Lytic protein]]
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[[Category: uracil-dna glycosylase inhibitor]]
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[[Category: Uracil-dna glycosylase inhibitor]]
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[[Category: uracil-dna glycosylase,hydrolase]]
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[[Category: Uracil-dna glycosylase,hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 08:31:43 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 03:54:45 2008''
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Revision as of 05:31, 4 May 2008

Image:2j8x.jpg

Template:STRUCTURE 2j8x

EPSTEIN-BARR VIRUS URACIL-DNA GLYCOSYLASE IN COMPLEX WITH UGI FROM PBS-2


Overview

Epstein-Barr virus (EBV) is a human gamma-herpesvirus. Within its 86 open reading frame containing genome, two enzymes avoiding uracil incorporation into DNA can be found: uracil triphosphate hydrolase and uracil-DNA glycosylase (UNG). The latter one excises uracil bases that are due to cytosine deamination or uracil misincorporation from double-stranded DNA substrates. The EBV enzyme belongs to family 1 UNGs. We solved the three-dimensional structure of EBV UNG in complex with the uracil-DNA glycosylase inhibitor protein (Ugi) from bacteriophage PBS-2 at a resolution of 2.3 A by X-ray crystallography. The structure of EBV UNG encoded by the BKRF3 reading frame shows the excellent global structural conservation within the solved examples of family 1 enzymes. Four out of the five catalytic motifs are completely conserved, whereas the fifth one, the leucine loop, carries a seven residue insertion. Despite this insertion, catalytic constants of EBV UNG are similar to those of other UNGs. Modelling of the EBV UNG-DNA complex shows that the longer leucine loop still contacts DNA and is likely to fulfil its role of DNA binding and deformation differently than the enzymes with previously solved structures. We could show that despite the evolutionary distance of EBV UNG from the natural host protein, bacteriophage Ugi binds with an inhibitory constant of 8 nM to UNG. This is due to an excellent specificity of Ugi for conserved elements of UNG, four of them corresponding to catalytic motifs and a fifth one corresponding to an important beta-turn structuring the catalytic site.

About this Structure

2J8X is a Protein complex structure of sequences from Bacillus phage pbs2 and Human herpesvirus 4. Full crystallographic information is available from OCA.

Reference

New insights on the role of the gamma-herpesvirus uracil-DNA glycosylase leucine loop revealed by the structure of the Epstein-Barr virus enzyme in complex with an inhibitor protein., Geoui T, Buisson M, Tarbouriech N, Burmeister WP, J Mol Biol. 2007 Feb 9;366(1):117-31. Epub 2006 Nov 7. PMID:17157317 Page seeded by OCA on Sun May 4 08:31:43 2008

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