Masataka Kasai

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We created a whole-mount in situ hybridization (WISH) database, termed EMBRYS, containing expression data of 1520 transcription factors and cofactors expressed in E9.5, E10.5, and E11.5 mouse embryos--a highly dynamic stage of skeletal myogenesis. This approach implicated 43 genes in regulation of embryonic myogenesis, including a transcriptional repressor,(More)
Accumulating evidence suggests that many brain diseases are associated with defects in neuronal migration, suggesting that this step of neurogenesis is critical for brain organization. However, the molecular mechanisms underlying neuronal migration remain largely unknown. Here, we identified the zinc-finger transcriptional repressor RP58 as a key regulator(More)
Appropriate number of neurons and glial cells is generated from neural stem cells (NSCs) by the regulation of cell cycle exit and subsequent differentiation. Although the regulatory mechanism remains obscure, Id (inhibitor of differentiation) proteins are known to contribute critically to NSC proliferation by controlling cell cycle. Here, we report that a(More)
The neocortex and the hippocampus comprise several specific layers containing distinct neurons that originate from progenitors at specific development times, under the control of an adequate cell-division patterning mechanism. Although many molecules are known to regulate this cell-division patterning process, its details are not well understood. Here, we(More)
The structure of human translin at 2.2 A resolution is reported in space group C222(1). Translin forms a tetramer in the asymmetric unit. Although the monomer structure is almost the same as the crystal structure of murine translin in space group P2(1)2(1)2, the relative positions of the tetramers differ between the human and murine translins. This suggests(More)
RP58, a novel zinc finger protein containing a POZ domain, is a sequence-specific transcriptional repressor. To understand the role of this protein, we examined RP58 gene expression in the developing mouse brain by quantitative polymerase chain reaction (PCR) and in situ hybridization. RP58 mRNA expression was detected at embryonic day (E) 10 in the(More)
Relatively large numbers of nonimmune spleen cells do not protect against the local growth of two lymphomas. However, this heterogeneous population of splenic lymphocytes contains a subset of cells that efficiently protects against in vivo tumor growth. This cell population (cell-surface phenotype Thyl.2(-)Ig(-)Ly5.1(+)) represents less than 5 percent of(More)
The acetylesterase (AE) activity of DVIM (diarrhea virus of infant mice) was assigned to the haemagglutinin-esterase (HE) protein. The substrate specificity was examined using the natural substrate bovine submaxillary mucin (BSM) and/or synthetic substrates p-nitrophenylacetate (p-NiA) and α-naphthylacetate (α-NA) and compared with several strains of MHV(More)
The zinc finger transcription factor RP58 (also known as ZNF238) regulates neurogenesis of the mouse neocortex and cerebellum (Okado et al. 2009; Xiang et al. 2011; Baubet et al. 2012; Ohtaka-Maruyama et al. 2013), but its mechanism of action remains unclear. In this study, we report a cell-autonomous function for RP58 during the differentiation of(More)
The octameric ring protein, Translin, demonstrates marked similarities to the family of helicase enzymes regarding its quaternary organization and dimerization of subunits. Here we show that the level of Translin closely parallels the proliferative state in various cell types. Expression is periodic during the cell cycle, with protein synthesis becoming(More)