1mug

From Proteopedia

(Difference between revisions)

Revision as of 09:55, 25 December 2014

G:T/U MISMATCH-SPECIFIC DNA GLYCOSYLASE FROM E.COLI

Structural highlights

1mug is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[MUG_ECOLI] Excises ethenocytosine and uracil, which can arise by alkylation or deamination of cytosine, respectively, from the corresponding mispairs with guanine in ds-DNA. It is capable of hydrolyzing the carbon-nitrogen bond between the sugar-phosphate backbone of the DNA and the mispaired base. The complementary strand guanine functions in substrate recognition. Required for DNA damage lesion repair in stationary-phase cells.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

G:U mismatches resulting from deamination of cytosine are the most common promutagenic lesions occurring in DNA. Uracil is removed in a base-excision repair pathway by uracil DNA-glycosylase (UDG), which excises uracil from both single- and double-stranded DNA. Recently, a biochemically distinct family of DNA repair enzymes has been identified, which excises both uracil and thymine, but only from mispairs with guanine. Crystal structures of the mismatch-specific uracil DNA-glycosylase (MUG) from E. coli, and of a DNA complex, reveal a remarkable structural and functional homology to UDGs despite low sequence identity. Details of the MUG structure explain its thymine DNA-glycosylase activity and the specificity for G:U/T mispairs, which derives from direct recognition of guanine on the complementary strand.

Crystal structure of a G:T/U mismatch-specific DNA glycosylase: mismatch recognition by complementary-strand interactions.,Barrett TE, Savva R, Panayotou G, Barlow T, Brown T, Jiricny J, Pearl LH Cell. 1998 Jan 9;92(1):117-29. PMID:9489705^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Gallinari P, Jiricny J. A new class of uracil-DNA glycosylases related to human thymine-DNA glycosylase. Nature. 1996 Oct 24;383(6602):735-8. PMID:8878487 doi:http://dx.doi.org/10.1038/383735a0
↑ O'Neill RJ, Vorob'eva OV, Shahbakhti H, Zmuda E, Bhagwat AS, Baldwin GS. Mismatch uracil glycosylase from Escherichia coli: a general mismatch or a specific DNA glycosylase? J Biol Chem. 2003 Jun 6;278(23):20526-32. Epub 2003 Mar 31. PMID:12668677 doi:http://dx.doi.org/10.1074/jbc.M210860200
↑ Barrett TE, Savva R, Panayotou G, Barlow T, Brown T, Jiricny J, Pearl LH. Crystal structure of a G:T/U mismatch-specific DNA glycosylase: mismatch recognition by complementary-strand interactions. Cell. 1998 Jan 9;92(1):117-29. PMID:9489705

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1mug"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1mug]] is a 1 chain structure with 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=1MUG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1MUG FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1mug FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mug OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1mug RCSB], [http://www.ebi.ac.uk/pdbsum/1mug PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1mug FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mug OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1mug RCSB], [http://www.ebi.ac.uk/pdbsum/1mug PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/MUG_ECOLI MUG_ECOLI]] Excises ethenocytosine and uracil, which can arise by alkylation or deamination of cytosine, respectively, from the corresponding mispairs with guanine in ds-DNA. It is capable of hydrolyzing the carbon-nitrogen bond between the sugar-phosphate backbone of the DNA and the mispaired base. The complementary strand guanine functions in substrate recognition. Required for DNA damage lesion repair in stationary-phase cells.<ref>PMID:8878487</ref> <ref>PMID:12668677</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 32: / Line 34: @@
 </StructureSection>
 [[Category: Escherichia coli]]
-[[Category: Barlow, T.]]
+[[Category: Barlow, T]]
-[[Category: Barrett, T E.]]
+[[Category: Barrett, T E]]
-[[Category: Brown, T.]]
+[[Category: Brown, T]]
-[[Category: Jiricny, J.]]
+[[Category: Jiricny, J]]
-[[Category: Panayotou, G.]]
+[[Category: Panayotou, G]]
-[[Category: Pearl, L H.]]
+[[Category: Pearl, L H]]
-[[Category: Savva, R.]]
+[[Category: Savva, R]]
 [[Category: Dna-glycosylase]]
 [[Category: Hydrolase]]

1mug

From Proteopedia

Revision as of 09:55, 25 December 2014

G:T/U MISMATCH-SPECIFIC DNA GLYCOSYLASE FROM E.COLI

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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