期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 296, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jbc.2021.100625
关键词
-
资金
- Lee Kuan Yew Postdoctoral Fellowship
- American Association of Immunologists Careers in Immunology Fellowship
- American Association of Immunologists Early Career Faculty Travel Grant
- PSC-CUNY Enhanced Research Award
Class switch recombination (CSR) is the process of B cells switching production from IgM/IgD to other immunoglobulin isotypes. SANBR, identified as a negative regulator of CSR, inhibits CSR through its BTB domain.
Class switch recombination (CSR) is the process by which B cells switch production from IgM/IgD to other immunoglobulin isotypes, enabling them to mount an effective immune response against pathogens. Timely resolution of CSR prevents damage due to an uncontrolled and prolonged immune response. While many positive regulators of CSR have been described, negative regulators of CSR are relatively unknown. Using an shRNA library screen targeting more than 28,000 genes in a mouse B cell line, we have identified a novel, uncharacterized protein of 82kD (KIAA1841, NM_027860), which we have named SANBR (SANT and BTB domain regulator of CSR), as a negative regulator of CSR. The purified, recombinant BTB domain of SANBR exhibited characteristic properties such as homodimerization and interaction with corepressor proteins, including HDAC and SMRT. Overexpression of SANBR inhibited CSR in primary mouse splenic B cells, and inhibition of CSR is dependent on the BTB domain while the SANT domain is largely dispensable. Thus, we have identified a new member of the BTB family that serves as a negative regulator of CSR. Future investigations to identify transcriptional targets of SANBR in B cells will reveal further insights into the specific mechanisms by which SANBR regulates CSR as well as fundamental gene regulatory activities of this protein.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据