A partial library of the Escherichia coli genomic genes has been constructed, in which each clone has part of a genomic gene fused in frame with the lacZ gene in addition to its promoter and operator. DNA of randomly selected clones was sequenced, and the resultant deduced N-terminal amino acid sequences showed that 17 out of 26 genes analyzed encode unknown proteins. Genomic locations of the cloned genes and their expressional regulations under the aerobic and anaerobic conditions were also analyzed. These results suggest that this library is useful for the global analysis of the E. coli genomic genes and that this strategy may be applicable to the genomic analysis of other microorganisms.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1271/bbb.58.117 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Deletion of atypical type II restriction genes in Clostridium cellulovorans using a Cas9-based gene editing system.
Appl Microbiol Biotechnol
January 2025
Chair of Microbiology, Technical University of Munich, TUM School of Life Science, Emil-Ramann-Str. 4, 85354, Freising, Germany.
The anaerobic bacterium Clostridium cellulovorans is a promising candidate for the sustainable production of biofuels and platform chemicals due to its cellulolytic properties. However, the genomic engineering of the species is hampered because of its poor genetic accessibility and the lack of genetic tools. To overcome this limitation, a protocol for triparental conjugation was established that enables the reliable transfer of vectors for markerless chromosomal modification into C.
View Article and Find Full Text PDFTwo NADPH-dependent 2-ketogluconate reductases involved in 2-ketogluconate assimilation in sp. strain CHM43.
Appl Environ Microbiol
January 2025
Joint Degree Program of Kasetsart University and Yamaguchi University, Graduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi, Japan.
Unlabelled: Incomplete oxidation of glucose by sp. strain CHM43 produces gluconic acid and then 2- or 5-ketogluconic acid. Although 2-keto-D-gluconate (2KG) is a valuable compound, it is sometimes consumed by itself via an unknown metabolic pathway.
View Article and Find Full Text PDFDraft genome sequencing of multidrug-resistant strains isolated from mastitic cow milk.
Microbiol Resour Announc
January 2025
Molecular Biology and Bioinformatics Laboratory, Department of Gynecology, Obstetrics and Reproductive Health, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh.
is an important antibiotic-resistant pathogen in mastitis, with broader public health implications. We report the genomes of two strains, MBBL4 and MBBL5, isolated from mastitic cow milk. The draft genomes, covering 4.
View Article and Find Full Text PDFPersistent cross-species transmission systems dominate Shiga toxin-producing O157:H7 epidemiology in a high incidence region: A genomic epidemiology study.
Elife
January 2025
Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Canada.
Several areas of the world suffer a notably high incidence of Shiga toxin-producing . To assess the impact of persistent cross-species transmission systems on the epidemiology of O157:H7 in Alberta, Canada, we sequenced and assembled O157:H7 isolates originating from collocated cattle and human populations, 2007-2015. We constructed a timed phylogeny using BEAST2 using a structured coalescent model.
View Article and Find Full Text PDFAn evolved, orthogonal ssDNA generator for targeted hypermutation of multiple genomic loci.
Nucleic Acids Res
January 2025
Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
Achieving targeted hypermutation of specific genomic sequences without affecting other regions remains a key challenge in continuous evolution. To address this, we evolved a T7 RNA polymerase (RNAP) mutant that synthesizes single-stranded DNA (ssDNA) instead of RNA in vivo, while still exclusively recognizing the T7 promoter. By increasing the error rate of the T7 RNAP mutant, it generates mutated ssDNA that recombines with homologous sequences in the genome, leading to targeted genomic hypermutation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!