In the ten years since the discovery of activation-induced cytidine deaminase (AID) there has been considerable effort to understand the mechanisms behind this enzyme's ability to target and modify immunoglobulin genes leading to somatic hypermutation and class switch recombination. While the majority of research has focused on mouse and human models of AID function, work on other species, from lamprey to rabbit and sheep, has taught us much about the scope of functions of the AID mutator. This review takes a species-comparative approach to what has been learned about the AID mutator enzyme and its role in humoral immunity.
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http://dx.doi.org/10.1016/j.dci.2011.02.005 | DOI Listing |
J Biol Chem
December 2024
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China. Electronic address:
Base editing is preferable for bacterial gene inactivation without generating double strand breaks, requiring homology recombination or highly efficient DNA delivery capability. However, the potential of base editing is limited by the adjoined dependence on the editing window and protospacer adjacent motif (PAM). Herein, we report an unconstrained base editing system to enable the inactivation of any genes of interest (GOIs) in bacteria.
View Article and Find Full Text PDFJ Biol Chem
December 2024
School of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan, 453003, China. Electronic address:
Metastasis is a major cause of fatality in hepatocellular carcinoma (HCC), although the precise mechanisms driving the metastatic process remain incompletely understood. In this study, we have made several important findings. Firstly, we have discovered that elevated activation-induced cytidine deaminase (AID) expression is positively correlated with Jagged 1 (JAG1) levels in clinically metastatic HCC patients.
View Article and Find Full Text PDFNeoplasia
January 2025
Center for Prevention and Therapy of Gynecological Cancers, Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, ROC; Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan, ROC; Department of Obstetrics & Gynecology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, ROC. Electronic address:
Introduction: Epidemiological studies have implicated ovulation as a risk factor for ovarian high-grade serous carcinoma (HGSC) at the initiation stage. Precancerous lesions of HGSC commonly exhibit TP53 mutations attributed to DNA deamination and are frequently localized in the fallopian tube epithelium (FTE), a site regularly exposed to ovulatory follicular fluid (FF). This study aimed to assess the mutagenic potential of FF and investigate the expression levels and functional role of activation-induced cytidine deaminase (AID) following ovulation, along with the resulting TP53 DNA deamination.
View Article and Find Full Text PDFDetermining the phenotypic effects of single nucleotide variants is critical for understanding the genome and interpreting clinical sequencing results. Base editors, including diversifying base editors that create C>N mutations, are potent tools for installing point mutations in mammalian genomes and studying their effect on cellular function. Numerous base editor options are available for such studies, but little information exists on how the composition of the editor (deaminase, recruitment method, and fusion architecture) affects editing.
View Article and Find Full Text PDFPoult Sci
December 2024
MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China. Electronic address:
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