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Bacillus subtilis is the best-characterized member of the Gram-positive bacteria. Its genome of 4,214,810 base pairs comprises 4,100 protein-coding genes. Of these protein-coding genes, 53% are represented once, while a quarter of the genome corresponds to several gene families that have been greatly expanded by gene duplication, the largest family(More)
Two genes encoding functional RNase H (EC were isolated from a gram-positive bacterium, Bacillus subtilis 168. Two DNA clones exhibiting RNase H activities both in vivo and in vitro were obtained from a B. subtilis DNA library. One (28.2 kDa) revealed high similarity to Escherichia coli RNase HII, encoded by the rnhB gene. The other (33.9 kDa) was(More)
All the SfiI sites and most of the NotI sites were located precisely on the chromosome of Bacillus subtilis 168 by a novel method, termed gene-directed mutagenesis. The stepwise elimination of these restriction sites by this method allowed not only the physical connection of the restriction fragments but also the accurate determination of the position of(More)
Database searches indicated that the genome of Bacillus subtilis contains three different genes encoding RNase H homologues. The ypdQ gene encodes an RNase HI homologue with 132 amino acid residues, whereas the rnh and ysgB genes encode RNase HII homologues with 255 and 313 amino acid residues, respectively. RNases HI and HII show no significant sequence(More)
The number of indispensable chromosomal loci for a bacterium, Bacillus subtilis was estimated. Seventy-nine randomly selected chromosomal loci were investigated by mutagenesis. Mutation at only six loci rendered B. subtilis unable to form colonies. In contrast, mutants for the rest of the 73 loci retained the ability to form colonies. Mutant B. subtilis(More)
We attempted to optimize the production of zeaxanthin in Escherichia coli by reordering five biosynthetic genes in the natural carotenoid cluster of Pantoea ananatis. Newly designed operons for zeaxanthin production were constructed by the ordered gene assembly in Bacillus subtilis (OGAB) method, which can assemble multiple genes in one step using an(More)
Cloning the whole 3.5-megabase (Mb) genome of the photosynthetic bacterium Synechocystis PCC6803 into the 4.2-Mb genome of the mesophilic bacterium Bacillus subtilis 168 resulted in a 7.7-Mb composite genome. We succeeded in such unprecedented large-size cloning by progressively assembling and editing contiguous DNA regions that cover the entire(More)
We established a protocol to construct complete recombinant genomes from their small contiguous DNA pieces and obtained the genomes of mouse mitochondrion and rice chloroplast using a B. subtilis genome (BGM) vector. This method allows the design of any recombinant genomes, valuable not only for fundamental research in systems biology and synthetic biology(More)
BACKGROUND RNA of RNA-DNA hybrids can be degraded by ribonucleases H present in all organisms including the eukaryote Saccharomyces cerevisiae. Determination of the number and roles of the RNases H in eukaryotes is quite feasible in S. cerevisiae. RESULTS Two S. cerevisiae RNases H, related to Escherichia coli RNase HI and HII, are not required for growth(More)