A chromosomal repeated sequence from Streptococcus thermophilus was identified as a new insertion sequence (IS), IS1191. This is the first IS element characterized in this species. This 1313 bp element has 28 bp imperfect terminal inverted repeats and is flanked by short direct repeats of 8 bp. The single large open reading frame of IS1191 encodes a 391-amino-acid protein which displays homologies with transposases encodes by IS1201 from Lactobacillus helveticus (44.5% amino-acid sequence identity) and by the other ISs of the IS256 family. One of the copies of IS1191 is inserted into a truncated iso-IS981 element. The nucleotide sequences of two truncated iso-IS981s from S. thermophilus and the sequence of IS981 element from Lactococcus lactis share more than 99% identity. The distribution of these insertion sequences in L. lactis and S. thermophilus strains suggests that intergeneric transfers occur during cocultures used in the manufacture of cheese.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1365-2958.1995.tb02392.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
"Chance and Necessity" on the Molecular Evolution of REV3 (a Catalytic Subunit of DNA Polymerase ζ)-The Dual Roles of Translesion and Neuronal Extension.
Genes Cells
January 2025
Department of Genetic Biochemistry, The National Institutes of Biomedical Innovation, Health and Nutrition, Shinjuku-ku, Tokyo, Japan.
Catalytic subunit of DNA polymerase ζ (REV3), involved in translesion-replication is evolutionarily conserved from yeast and plants to higher eukaryotes. However, a large intermediate domain is inserted in REV3 of humans and mice. The domain has "DUF4683" region, which is significantly similar to human neurite extension and migration factor (NEXMIF).
View Article and Find Full Text PDFUsing synthetic biology to express nitrogenase biosynthesis pathway in rice and to overcome barriers of nitrogenase instability in plant cytosol.
Trends Biotechnol
January 2025
College of Biological Sciences, China Agricultural University, Beijing 100193, China. Electronic address:
Engineering nitrogen fixation in cereals could reduce usage of chemical nitrogen fertilizers. Here, a nitrogenase biosynthesis pathway comprising 13 genes (nifB nifH nifD nifK nifE nifN nifX hesA nifV nifS nifU groES groEL) was introduced into rice by transforming multigene vectors and subsequently by sexual crossing between transgenic rice plants. Genome sequencing analysis revealed that 13 nif genes in F hybrid rice lines L12-13 and L8-17 were inserted at two loci on rice chromosome 1.
View Article and Find Full Text PDFTransferrin-binding domain inserted-adenovirus hexon engineering enables systemic immune evasion and intratumoral T-cell activation.
Theranostics
January 2025
Department of Pharmacology, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea.
Adenovirus-based therapies have encountered significant challenges due to host immunity, particularly from pre-existing antibodies. Many trials have struggled to evade antibody response; however, the efficiency of these efforts was limited by the diversity of antibody Fv-region recognizing multiple amino acid sequences. In this study, we developed an antibody-evading adenovirus vector by encoding a plasma-rich protein transferrin-binding domain.
View Article and Find Full Text PDFExpression, purification and immunogenicity analyses of receptor binding domain protein of severe acute respiratory syndrome coronavirus 2 from delta variant.
Vet Res Forum
December 2024
Institute of Pathogenic Microbiology, College of Biological Science and Engineering, and Nanchang Key Laboratory of Animal Virus and Genetic Engineering, Jiangxi Agricultural University, Nanchang, China.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the COVID-19 pandemic. The receptor binding domain (RBD), located at the spike protein of SARS-CoV-2, contains most of the neutralizing epitopes during viral infection and is an ideal antigen for vaccine development. In this study, bioinformatic analysis of the amino acid sequence data of SARS-CoV-2 RBD protein for the better understanding of molecular characteristics was performed.
View Article and Find Full Text PDFVirus-free CRISPR knock-in of a chimeric antigen receptor into KLRC1 generates potent GD2-specific natural killer cells.
Mol Ther
January 2025
Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, 53715, USA; Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, Wisconsin, 53715, USA; Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, 53715, USA. Electronic address:
Natural killer (NK) cells are an appealing off-the-shelf, allogeneic cellular therapy due to their cytotoxic profile. However, their activity against solid tumors remains suboptimal in part due to the upregulation of NK-inhibitory ligands, such as HLA-E, within the tumor microenvironment. Here, we utilize CRISPR-Cas9 to disrupt the KLRC1 gene (encoding the HLA-E-binding NKG2A receptor) and perform non-viral insertion of a GD2-targeting chimeric antigen receptor (CAR) within NK cells isolated from human peripheral blood.
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!