[Figure: see text].
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| http://dx.doi.org/10.1161/CIRCRESAHA.120.316666 | DOI Listing |
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DNA-binding affinity and specificity determine the phenotypic diversity in BCL11B-related disorders.
Am J Hum Genet
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Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; Institute of Human Genetics, University of Regensburg, 93053 Regensburg, Germany; Institute of Clinical Human Genetics, University Hospital Regensburg, 93053 Regensburg, Germany. Electronic address:
BCL11B is a Cys2-His2 zinc-finger (C2H2-ZnF) domain-containing, DNA-binding, transcription factor with established roles in the development of various organs and tissues, primarily the immune and nervous systems. BCL11B germline variants have been associated with a variety of developmental syndromes. However, genotype-phenotype correlations along with pathophysiologic mechanisms of selected variants mostly remain elusive.
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Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa, Japan.
Despite its broad application in in vitro studies, the application of targeted protein degradation (TPD) to animal models faces considerable challenges. Here, we develop inducible and cell-type specific TPD systems in mice using two degron systems: Oryza sativa TIR1 (OsTIR1)-auxin-inducible degron 2 (AID2) and human cereblon (hCRBN)-SALL4 degron (S4D). Efficient degradation of Satb1 protein by these systems recapitulates phenotypes observed in the Satb1-deficient mice.
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Laboratory for Transcriptional Regulation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Japan.
Genetic studies in mice have shown that the zinc finger transcription factor BCL11B has an essential role in regulating early T cell development and neurogenesis. A de novo heterozygous missense BCL11B variant, BCL11B, was isolated from a patient with T cell deficiency and neurological disorders. Here, we show that mice harboring the corresponding Bcl11b mutation show the emergence of natural killer (NK)/group 1 innate lymphoid cell (ILC1)-like NKp46 cells in the thymus and reduction in TBR1 neurons in the neocortex, which are observed with loss of Bcl11a but not Bcl11b.
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BCL11b is a transcription regulator and a tumor suppressor involved in lymphomagenesis, central nervous system (CNS) and immune system developments. BCL11b favors persistence of HIV latency and contributes to control cell cycle, differentiation and apoptosis in multiple organisms and cell models. Although BCL11b recruits the non-coding RNA 7SK and epigenetic enzymes to regulate gene expression, BCL11b-associated ribonucleoprotein complexes are unknown.
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EMBO J
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The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
Lgr5 intestinal stem cells (ISCs) are crucial for the intestinal epithelium renewal and regeneration after injury. However, the mechanism underlying the interplay between Wnt and BMP signaling in this process is not fully understood. Here we report that Bcl11b, which is downregulated by BMP signaling, enhances Wnt signaling to maintain Lgr5 ISCs and thus promotes the regeneration of the intestinal epithelium upon injury.
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