PMID- 22465611 OWN - NLM STAT- MEDLINE DCOM- 20120629 LR - 20211021 IS - 1090-2449 (Electronic) IS - 0014-4894 (Print) IS - 0014-4894 (Linking) VI - 131 IP - 1 DP - 2012 May TI - Characterization of a Trypanosoma brucei Alkb homolog capable of repairing alkylated DNA. PG - 92-100 LID - 10.1016/j.exppara.2012.03.011 [doi] AB - Trypanosoma brucei encodes a protein (denoted TbABH) that is homologous to AlkB of Escherichia coli and AlkB homolog (ABH) proteins in other organisms, raising the possibility that trypanosomes catalyze oxidative repair of alkylation-damaged DNA. TbABH was cloned and expressed in E. coli, and the recombinant protein was purified and characterized. Incubation of anaerobic TbABH with Fe(II) and alpha-ketoglutarate (alphaKG) produces a characteristic metal-to-ligand charge-transfer chromophore, confirming its membership in the Fe(II)/alphaKG dioxygenase superfamily. The protein binds to DNA, with a clear preference for alkylated oligonucleotides according to results derived by electrophoretic mobility shift assays. Finally, the protozoan gene was shown to partially complement E. coli alkB cells when stressed with methylmethanesulfonate; thus confirming assignment of TbABH as a functional AlkB protein in T. brucei. CI - Copyright (c) 2012 Elsevier Inc. All rights reserved. FAU - Simmons, Jana M AU - Simmons JM AD - Department of Biochemistry & Molecular Biology, Michigan State University, East Lansing, MI, United States. FAU - Koslowsky, Donna J AU - Koslowsky DJ FAU - Hausinger, Robert P AU - Hausinger RP LA - eng GR - R01 AI045835-05/AI/NIAID NIH HHS/United States GR - R01 GM063584-10/GM/NIGMS NIH HHS/United States GR - AI45835/AI/NIAID NIH HHS/United States GR - GM063584/GM/NIGMS NIH HHS/United States GR - R01 AI045835/AI/NIAID NIH HHS/United States GR - R01 GM063584/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20120320 PL - United States TA - Exp Parasitol JT - Experimental parasitology JID - 0370713 RN - 0 (DNA, Protozoan) RN - 0 (DNA-Binding Proteins) RN - 0 (Protozoan Proteins) RN - 0 (Recombinant Proteins) SB - IM MH - Alkylation MH - Amino Acid Sequence MH - Chromatography, Gel MH - Cloning, Molecular MH - DNA Repair/*physiology MH - DNA, Protozoan/chemistry/*genetics MH - DNA-Binding Proteins/chemistry/genetics/physiology MH - Electrophoresis, Polyacrylamide Gel MH - Electrophoretic Mobility Shift Assay MH - Escherichia coli MH - Gene Expression MH - Genetic Complementation Test MH - Humans MH - Molecular Sequence Data MH - Oxidation-Reduction MH - Protozoan Proteins/chemistry/genetics/*physiology MH - Recombinant Proteins/chemistry/genetics/isolation & purification MH - Sequence Alignment MH - Spectrophotometry, Ultraviolet MH - Trypanosoma brucei brucei/chemistry/*genetics PMC - PMC3340446 MID - NIHMS365647 EDAT- 2012/04/03 06:00 MHDA- 2012/06/30 06:00 PMCR- 2013/05/01 CRDT- 2012/04/03 06:00 PHST- 2012/01/16 00:00 [received] PHST- 2012/02/29 00:00 [revised] PHST- 2012/03/12 00:00 [accepted] PHST- 2012/04/03 06:00 [entrez] PHST- 2012/04/03 06:00 [pubmed] PHST- 2012/06/30 06:00 [medline] PHST- 2013/05/01 00:00 [pmc-release] AID - S0014-4894(12)00105-1 [pii] AID - 10.1016/j.exppara.2012.03.011 [doi] PST - ppublish SO - Exp Parasitol. 2012 May;131(1):92-100. doi: 10.1016/j.exppara.2012.03.011. Epub 2012 Mar 20.