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Extensive homologous recombination safeguards oocyte genome integrity in mammals.
Nucleic Acids Res
January 2025
MOE Key Laboratory of Biosystems Homeostasis and Protection, College of Life Sciences, Zhejiang University, No.866 Yuhangtang Road, 310058, Hangzhou, China.
Meiosis in mammalian oocytes is interrupted by a prolonged arrest at the germinal vesicle stage, during which oocytes have to repair DNA lesions to ensure genome integrity or otherwise undergo apoptosis. The FIRRM/FLIP-FIGNL1 complex dissociates RAD51 from the joint DNA molecules in both homologous recombination (HR) and DNA replication. However, as a type of non-meiotic, non-replicative cells, whether this RAD51-dismantling mechanism regulates genome integrity in oocytes remains elusive.
View Article and Find Full Text PDFThe pathway to resolve dimeric forms distinguishes plasmids from megaplasmids in Enterobacteriaceae.
Nucleic Acids Res
January 2025
Laboratoire de Microbiologie et de Génétique Moléculaires, Centre de Biologie Intégrative, Université de Toulouse, CNRS, 165 Rue Marianne Grunberg-Manago, campus Paul Sabatier, 118, route de Narbonne, 31062, Toulouse Cedex, France.
Bacterial genomes contain a plethora of secondary replicons of divergent size. Circular replicons must carry a system for resolving dimeric forms, resulting from recombination between sister copies. These systems use site-specific recombinases.
View Article and Find Full Text PDFWTAP-Mediated m6A Modification of TRAIL-DR4 Suppresses MH7A Cell Apoptosis.
Int J Rheum Dis
January 2025
The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, Anhui, China.
Background: N6-methyladenosine (m6A) is one of the most conserved internal RNA modifications, which has been implicated in many biological processes, such as apoptosis and proliferation. Wilms tumor 1-associating protein (WTAP), as a key component of m6A methylation, is a nuclear protein that has been associated with the regulation of proliferation and apoptosis. Rheumatoid arthritis (RA), a systemic, infiltrating autoimmune disease, is characterized by synovial hyperplasia.
View Article and Find Full Text PDFHGF-HGFR-STAT signaling axis regulates haemocyte proliferation in oyster Crassostrea gigas.
Dev Comp Immunol
January 2025
Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian 116023, China. Electronic address:
Article Synopsis
- The study identified a homologue of hepatocyte growth factor (CgHGF-like) and its receptor (CgHGFR) in the oyster Crassostrea gigas, which are involved in cell growth and division.
- Both genes are expressed in all tested tissues, with the highest levels found in haemocytes, and their expression significantly increases when the oysters are stimulated with Vibrio splendidus.
- The interaction between CgHGF-like and CgHGFR plays a crucial role in regulating haemocyte proliferation during immune responses, primarily by activating the CgSTAT pathway.
Binding mode-guided development of high-performance antibodies targeting site-specific posttranslational modifications.
Proc Natl Acad Sci U S A
January 2025
Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY 10016.
Posttranslational modifications (PTMs) of proteins play critical roles in regulating many cellular events. Antibodies targeting site-specific PTMs are essential tools for detecting and enriching PTMs at sites of interest. However, fundamental difficulties in molecular recognition of both PTM and surrounding peptide sequence have hindered the efficient generation of highly sequence-specific anti-PTM antibodies.
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