Primary structure of rat chromogranin A and distribution of its mRNA

AbstractThe primary structure of rat chromogranin A has been deduced from a rat adrenal cDNA clone. A comparison of rat and bovine chromogranin A reveals several similar features: clusters of polyglutamic acid, similar amino acid composition, position of seven of 10 pairs of basic amino acids, identical placement of the only two cysteine residues, a highly conserved N- and C-terminus, and a sequence homologous to porcine pancreastatin 1–49 [(1986) Nature 324, 476–478]. Unique features of rat chromogranin A are an eicosaglutamine sequence and two potential N-linked glycosylation sites. Chromogranin A mRNA is detectable in adrenal medulla, anterior pituitary, cerebral cortex, and hippocampus, as well as tumor cell lines derived from pancreas, pituitary, and adrenal medulla

Mammalian target of rapamycin complex 1 signaling opposes the effects of anchorage loss, leading to activation of Cdk4 and Cdc6 stabilization

AbstractWhen deprived of an anchorage to the extracellular matrix, fibroblasts arrest in the G1 phase with inactivation of Cdk4/6 and Cdk2 and destruction of Cdc6, the assembler of prereplicative complexes essential for S phase onset. How cellular anchorages control these kinases and Cdc6 stability is poorly understood. Here, we report that in rat embryonic fibroblasts, activation of mammalian target of rapamycin complex 1 by a Tsc2 mutation or overexpression of a constitutively active mutant Rheb overrides the absence of the anchorage and stabilizes Cdc6 at least partly via activating Cdk4/6 that induces Emi1, an APC/CCdh1 ubiquitin ligase inhibitor.Structured summaryMINT-7890626: cdc27 (uniprotkb:Q4V8A2) physically interacts (MI:0915) with Cyclin-A (uniprotkb:Q6AY13) by anti bait coimmunoprecipitation (MI:0006

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京都大学0048新制・課程博士医学博士甲第1974号医博第491号新制||医||234(附属図書館)5215UT51-52-N39京都大学大学院医学研究科生理系専攻(主査)教授 沼 正作, 教授 村地 孝, 教授 早石 修学位規則第5条第1項該当Kyoto UniversityDA