title: Multiple forms of formamidopyrimidine-DNA glycosylase produced by alternative splicing in Arabidopsis thaliana.
abstract: Formamidopyrimidine-DNA glycosylase (FPG) catalyzes the initial steps in the repair of DNA containing oxidized purines. Two cDNA clones from Arabidopsis thaliana encoding homologs of bacterial FPG have previously been described. We now report that there are at least five additional variants of FPG mRNA in Arabidopsis, each apparently produced from the same gene (AtMMH) by alternative splicing. Thus, AtMMH, like at least four other genes in the base excision repair pathway of human cells, produces multiple forms of protein product through alternative splicing. The variant forms of Arabidopsis FPG may be localized in different locations in the cells, may have different preferences for oxidized substrates, and/or may recruit different proteins that guide the subsequent steps of base excision repair.
authors.affiliation: Section of Plant Biology, University of California, One Shields Ave., Davis, CA 95616, USA. tmmurphy@ucdavis.edu
authors.forename: T M
authors.initials: TM
authors.lastname: Murphy
authors.forename: M J
authors.initials: MJ
authors.lastname: Gao
mesh_terms: D017398:Alternative Splicing; D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000201:enzymology / Q000235:genetics; D003001:Cloning, Molecular; D043382:DNA-Formamidopyrimidine Glycosylase; D008969:Molecular Sequence Data; D009699:N-Glycosyl Hydrolases / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011809:Quinones / Q000138:chemical synthesis* / Q000737:chemistry; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: C442579:Al2(5,8-di-Br-HB)Cl4; D009942:Organometallic Compounds; D011809:Quinones; D009699:N-Glycosyl Hydrolases; D043382:DNA-Formamidopyrimidine Glycosylase