6y0q

From Proteopedia

(Difference between revisions)

Current revision

Alpha-ketoglutarate-dependent dioxygenase AlkB in complex with Fe, AKG and methylated DNA under anaerobic environment using FT-SSX methods

Structural highlights

6y0q is a 1 chain structure with sequence from Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.75Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ALKB_ECOLI Dioxygenase that repairs alkylated DNA and RNA containing 3-methylcytosine or 1-methyladenine by oxidative demethylation. Has highest activity towards 3-methylcytosine. Has lower activity towards alkylated DNA containing ethenoadenine, and no detectable activity towards 1-methylguanine or 3-methylthymine. Accepts double-stranded and single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron. Provides extensive resistance to alkylating agents such as MMS and DMS (SN2 agents), but not to MMNG and MNU (SN1 agents).^[1] ^[2] ^[3] ^[4] ^[5] ^[6]

Publication Abstract from PubMed

Cryogenic X-ray diffraction is a powerful tool for crystallographic studies on enzymes including oxygenases and oxidases. Amongst the benefits that cryo-conditions (usually employing a nitro-gen cryo-stream at 100 K) enable, is data collection of di-oxy-gen-sensitive samples. Although not strictly anaerobic, at low temperatures the vitreous ice conditions severely restrict O2 diffusion into and/or through the protein crystal. Cryo-conditions limit chemical reactivity, including reactions that require significant conformational changes. By contrast, data collection at room temperature imposes fewer restrictions on diffusion and reactivity; room-temperature serial methods are thus becoming common at synchrotrons and XFELs. However, maintaining an anaerobic environment for di-oxy-gen-dependent enzymes has not been explored for serial room-temperature data collection at synchrotron light sources. This work describes a methodology that employs an adaptation of the 'sheet-on-sheet' sample mount, which is suitable for the low-dose room-temperature data collection of anaerobic samples at synchrotron light sources. The method is characterized by easy sample preparation in an anaerobic glovebox, gentle handling of crystals, low sample consumption and preservation of a localized anaerobic environment over the timescale of the experiment (<5 min). The utility of the method is highlighted by studies with three X-ray-radiation-sensitive Fe(II)-containing model enzymes: the 2-oxoglutarate-dependent l-arginine hy-droxy-lase VioC and the DNA repair enzyme AlkB, as well as the oxidase isopenicillin N synthase (IPNS), which is involved in the biosynthesis of all penicillin and cephalosporin antibiotics.

Anaerobic fixed-target serial crystallography.,Rabe P, Beale JH, Butryn A, Aller P, Dirr A, Lang PA, Axford DN, Carr SB, Leissing TM, McDonough MA, Davy B, Ebrahim A, Orlans J, Storm SLS, Orville AM, Schofield CJ, Owen RL IUCrJ. 2020 Aug 21;7(Pt 5):901-912. doi: 10.1107/S2052252520010374. eCollection, 2020 Sep 1. PMID:32939282^[7]

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

References

↑ Falnes PO, Johansen RF, Seeberg E. AlkB-mediated oxidative demethylation reverses DNA damage in Escherichia coli. Nature. 2002 Sep 12;419(6903):178-82. PMID:12226668 doi:10.1038/nature01048
↑ Aas PA, Otterlei M, Falnes PO, Vagbo CB, Skorpen F, Akbari M, Sundheim O, Bjoras M, Slupphaug G, Seeberg E, Krokan HE. Human and bacterial oxidative demethylases repair alkylation damage in both RNA and DNA. Nature. 2003 Feb 20;421(6925):859-63. PMID:12594517 doi:10.1038/nature01363
↑ Yu B, Edstrom WC, Benach J, Hamuro Y, Weber PC, Gibney BR, Hunt JF. Crystal structures of catalytic complexes of the oxidative DNA/RNA repair enzyme AlkB. Nature. 2006 Feb 16;439(7078):879-84. PMID:16482161 doi:10.1038/nature04561
↑ Yu B, Hunt JF. Enzymological and structural studies of the mechanism of promiscuous substrate recognition by the oxidative DNA repair enzyme AlkB. Proc Natl Acad Sci U S A. 2009 Aug 25;106(34):14315-20. Epub 2009 Aug 11. PMID:19706517
↑ Yi C, Jia G, Hou G, Dai Q, Zhang W, Zheng G, Jian X, Yang CG, Cui Q, He C. Iron-catalysed oxidation intermediates captured in a DNA repair dioxygenase. Nature. 2010 Nov 11;468(7321):330-3. PMID:21068844 doi:10.1038/nature09497
↑ Holland PJ, Hollis T. Structural and mutational analysis of Escherichia coli AlkB provides insight into substrate specificity and DNA damage searching. PLoS One. 2010 Jan 13;5(1):e8680. PMID:20084272 doi:10.1371/journal.pone.0008680
↑ Rabe P, Beale JH, Butryn A, Aller P, Dirr A, Lang PA, Axford DN, Carr SB, Leissing TM, McDonough MA, Davy B, Ebrahim A, Orlans J, Storm SLS, Orville AM, Schofield CJ, Owen RL. Anaerobic fixed-target serial crystallography. IUCrJ. 2020 Aug 21;7(Pt 5):901-912. doi: 10.1107/S2052252520010374. eCollection, 2020 Sep 1. PMID:32939282 doi:http://dx.doi.org/10.1107/S2052252520010374

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6y0q"

@@ Line 3: / Line 3: @@
 <StructureSection load='6y0q' size='340' side='right'caption='[[6y0q]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6y0q]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6Y0Q OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6Y0Q FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6y0q]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6Y0Q OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6Y0Q FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AKG:2-OXOGLUTARIC+ACID'>AKG</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=O5W:[(3~{S},5~{R})-5-(6-azanyl-1-methyl-purin-9-yl)-2-(phosphonooxymethyl)oxolan-3-yl]+[(2~{R},3~{S},5~{R})-5-[5-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-3-oxidanyl-oxolan-2-yl]methyl+hydrogen+phosphate'>O5W</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75&#8491;</td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4jht|4jht]]</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AKG:2-OXOGLUTARIC+ACID'>AKG</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=O5W:[(3~{S},5~{R})-5-(6-azanyl-1-methyl-purin-9-yl)-2-(phosphonooxymethyl)oxolan-3-yl]+[(2~{R},3~{S},5~{R})-5-[5-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-3-oxidanyl-oxolan-2-yl]methyl+hydrogen+phosphate'>O5W</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">alkB, aidD, b2212, JW2200 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6y0q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6y0q OCA], [https://pdbe.org/6y0q PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6y0q RCSB], [https://www.ebi.ac.uk/pdbsum/6y0q PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6y0q ProSAT]</span></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA_oxidative_demethylase DNA oxidative demethylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.11.33 1.14.11.33] </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=6y0q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6y0q OCA], [http://pdbe.org/6y0q PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6y0q RCSB], [http://www.ebi.ac.uk/pdbsum/6y0q PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6y0q ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/ALKB_ECOLI ALKB_ECOLI]] Dioxygenase that repairs alkylated DNA and RNA containing 3-methylcytosine or 1-methyladenine by oxidative demethylation. Has highest activity towards 3-methylcytosine. Has lower activity towards alkylated DNA containing ethenoadenine, and no detectable activity towards 1-methylguanine or 3-methylthymine. Accepts double-stranded and single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron. Provides extensive resistance to alkylating agents such as MMS and DMS (SN2 agents), but not to MMNG and MNU (SN1 agents).<ref>PMID:12226668</ref> <ref>PMID:12594517</ref> <ref>PMID:16482161</ref> <ref>PMID:19706517</ref> <ref>PMID:21068844</ref> <ref>PMID:20084272</ref>
+[https://www.uniprot.org/uniprot/ALKB_ECOLI ALKB_ECOLI] Dioxygenase that repairs alkylated DNA and RNA containing 3-methylcytosine or 1-methyladenine by oxidative demethylation. Has highest activity towards 3-methylcytosine. Has lower activity towards alkylated DNA containing ethenoadenine, and no detectable activity towards 1-methylguanine or 3-methylthymine. Accepts double-stranded and single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron. Provides extensive resistance to alkylating agents such as MMS and DMS (SN2 agents), but not to MMNG and MNU (SN1 agents).<ref>PMID:12226668</ref> <ref>PMID:12594517</ref> <ref>PMID:16482161</ref> <ref>PMID:19706517</ref> <ref>PMID:21068844</ref> <ref>PMID:20084272</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 21: / Line 19: @@
 </div>
 <div class="pdbe-citations 6y0q" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Dioxygenase 3D structures|Dioxygenase 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: DNA oxidative demethylase]]
+[[Category: Escherichia coli K-12]]
-[[Category: Ecoli]]
 [[Category: Large Structures]]
-[[Category: Aller, P]]
+[[Category: Aller P]]
-[[Category: Axford, D]]
+[[Category: Axford D]]
-[[Category: Beale, J H]]
+[[Category: Beale JH]]
-[[Category: Butryn, A]]
+[[Category: Butryn A]]
-[[Category: Dirr, A S]]
+[[Category: Dirr AS]]
-[[Category: Kamps, J J.A G]]
+[[Category: Kamps JJAG]]
-[[Category: Lang, P A]]
+[[Category: Lang PA]]
-[[Category: Leissing, T M]]
+[[Category: Leissing TM]]
-[[Category: McDonough, M A]]
+[[Category: McDonough MA]]
-[[Category: Orville, A M]]
+[[Category: Orville AM]]
-[[Category: Owen, R]]
+[[Category: Owen R]]
-[[Category: Rabe, P]]
+[[Category: Rabe P]]
-[[Category: Schofield, C J]]
+[[Category: Schofield CJ]]
-[[Category: 2-oxoglutarate]]
-[[Category: Dna repair]]
-[[Category: Iron dependant dioxygenase]]
-[[Category: Oxidoreductase]]

6y0q

From Proteopedia

Current revision

Alpha-ketoglutarate-dependent dioxygenase AlkB in complex with Fe, AKG and methylated DNA under anaerobic environment using FT-SSX methods

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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