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1uug

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Revision as of 07:30, 30 December 2020

ESCHERICHIA COLI URACIL-DNA GLYCOSYLASE:INHIBITOR COMPLEX WITH WILD-TYPE UDG AND WILD-TYPE UGI

Structural highlights

1uug is a 4 chain structure with sequence from Bppb2 and Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	UNG (ECOLI)
Activity:	Uridine nucleosidase, with EC number 3.2.2.3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[UNG_ECOLI] Excises uracil residues from the DNA which can arise as a result of misincorporation of dUMP residues by DNA polymerase or due to deamination of cytosine.[HAMAP-Rule:MF_00148] [UNGI_BPPB2] This protein binds specifically and reversibly to the host uracil-DNA glycosylase, preventing removal of uracil residues from PBS2 DNA by the host uracil-excision repair system.

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

Uracil-DNA glycosylase (UDG), which is a critical enzyme in DNA base-excision repair that recognizes and removes uracil from DNA, is specifically and irreversably inhibited by the thermostable uracil-DNA glycosylase inhibitor protein (Ugi). A paradox for the highly specific Ugi inhibition of UDG is how Ugi can successfully mimic DNA backbone interactions for UDG without resulting in significant cross-reactivity with numerous other enzymes that possess DNA backbone binding affinity. High-resolution X-ray crystal structures of Ugi both free and in complex with wild-type and the functionally defective His187Asp mutant Escherichia coli UDGs reveal the detailed molecular basis for duplex DNA backbone mimicry by Ugi. The overall shape and charge distribution of Ugi most closely resembles a midpoint in a trajectory between B-form DNA and the kinked DNA observed in UDG:DNA product complexes. Thus, Ugi targets the mechanism of uracil flipping by UDG and appears to be a transition-state mimic for UDG-flipping of uracil nucleotides from DNA. Essentially all the exquisite shape, electrostatic and hydrophobic complementarity for the high-affinity UDG-Ugi interaction is pre-existing, except for a key flip of the Ugi Gln19 carbonyl group and Glu20 side-chain, which is triggered by the formation of the complex. Conformational changes between unbound Ugi and Ugi complexed with UDG involve the beta-zipper structural motif, which we have named for the reversible pairing observed between intramolecular beta-strands. A similar beta-zipper is observed in the conversion between the open and closed forms of UDG. The combination of extremely high levels of pre-existing structural complementarity to DNA binding features specific to UDG with key local conformational changes in Ugi resolves the UDG-Ugi paradox and suggests a potentially general structural solution to the formation of very high affinity DNA enzyme-inhibitor complexes that avoid cross- reactivity.

Protein mimicry of DNA from crystal structures of the uracil-DNA glycosylase inhibitor protein and its complex with Escherichia coli uracil-DNA glycosylase.,Putnam CD, Shroyer MJ, Lundquist AJ, Mol CD, Arvai AS, Mosbaugh DW, Tainer JA J Mol Biol. 1999 Mar 26;287(2):331-46. PMID:10080896^[1]

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

References

↑ Putnam CD, Shroyer MJ, Lundquist AJ, Mol CD, Arvai AS, Mosbaugh DW, Tainer JA. Protein mimicry of DNA from crystal structures of the uracil-DNA glycosylase inhibitor protein and its complex with Escherichia coli uracil-DNA glycosylase. J Mol Biol. 1999 Mar 26;287(2):331-46. PMID:10080896 doi:10.1006/jmbi.1999.2605

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/1uug"

@@ Line 1: / Line 1: @@
 ==ESCHERICHIA COLI URACIL-DNA GLYCOSYLASE:INHIBITOR COMPLEX WITH WILD-TYPE UDG AND WILD-TYPE UGI==
-<StructureSection load='1uug' size='340' side='right' caption='[[1uug]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
+<StructureSection load='1uug' size='340' side='right'caption='[[1uug]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1uug]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bppb2 Bppb2] and [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UUG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UUG FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1uug]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bppb2 Bppb2] and [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UUG OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1UUG FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">UNG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></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=1uug FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uug OCA], [http://pdbe.org/1uug PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1uug RCSB], [http://www.ebi.ac.uk/pdbsum/1uug PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1uug FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uug OCA], [http://pdbe.org/1uug PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1uug RCSB], [http://www.ebi.ac.uk/pdbsum/1uug PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1uug ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/uu/1uug_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/uu/1uug_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 30: / Line 31: @@
 ==See Also==
-*[[DNA glycosylase|DNA glycosylase]]
+*[[DNA glycosylase 3D structures|DNA glycosylase 3D structures]]
-*[[Uracil glycosylate inhibitor|Uracil glycosylate inhibitor]]
+*[[Uracil glycosylase inhibitor|Uracil glycosylase inhibitor]]
-*[[Uracil-DNA glycosylase|Uracil-DNA glycosylase]]
-*[[Uracil-DNA glycosylase inhibitor|Uracil-DNA glycosylase inhibitor]]
 == References ==
 <references/>
@@ Line 40: / Line 39: @@
 [[Category: Bppb2]]
 [[Category: Ecoli]]
+[[Category: Large Structures]]
 [[Category: Uridine nucleosidase]]
 [[Category: Arvai, A S]]

1uug

From Proteopedia

Revision as of 07:30, 30 December 2020

ESCHERICHIA COLI URACIL-DNA GLYCOSYLASE:INHIBITOR COMPLEX WITH WILD-TYPE UDG AND WILD-TYPE UGI

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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