title: Changes in deoxyribonucleic acid polymerase activities in synthesis of deoxyribonucleic acid during sporulation of Bacillus subtilis.
abstract: The deoxyribonucleic acid (DNA) polymerase activities in Bacillus subtilis strains Marburg 168 (thy-trp2) and D22, a DNA polymerase I-deficient mutant, were measured at various stages of sporulation. The DNA polymerase I activity, which had decreased after the exponential growth, began to increase at the early stage of sporulation, reached a maximum and then again decreased. The activity of neither DNA polymerase II nor III was observed to change so drastically as that of DNA polymerase I during sporulation. The incorporation of [3H]deoxythymidine 5'-triphosphate ([3H]dTTP) into Brij 58-treated permeable cells increased during sporulation. The stimulation of [3H]dTTP incorporation into the cells by irradiation with ultraviolet light was also observed to coincide with DNA polymerase I activity. In strain D22 the activities of DNA polymerase II and III were almost constant with time. Neither change of [3H]dTTP incorporation into Brij 58-treated cells nor stimulation of incorporation by irradiation with ultraviolet light was observed.
mesh_terms: D001412:Bacillus subtilis / Q000378:metabolism / Q000502:physiology* / Q000528:radiation effects; D004256:DNA Polymerase I / Q000378:metabolism; D004257:DNA Polymerase II / Q000378:metabolism; D004258:DNA Polymerase III / Q000378:metabolism; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism*; D013171:Spores, Bacterial; D013936:Thymidine / Q000378:metabolism; D013942:Thymine Nucleotides / Q000378:metabolism; D014466:Ultraviolet Rays
chemical_list: D004269:DNA, Bacterial; D013942:Thymine Nucleotides; D004256:DNA Polymerase I; D004257:DNA Polymerase II; D004258:DNA Polymerase III; D004259:DNA-Directed DNA Polymerase; D013936:Thymidine