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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >MOLECULAR AND BIOCHEMICAL CHARACTERIZATION OF DNOS - A DROSOPHILA CA2+ CALMODULIN-DEPENDENT NITRIC OXIDE SYNTHASE
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MOLECULAR AND BIOCHEMICAL CHARACTERIZATION OF DNOS - A DROSOPHILA CA2+ CALMODULIN-DEPENDENT NITRIC OXIDE SYNTHASE

机译:DNOS的分子和生化表征-果蝇CA2 +依赖钙调素的一氧化氮合酶。

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摘要

Nitric oxide (NO) is an intercellular messenger involved with various aspects of mammalian physiology ranging from vasodilation and macrophage cytotoxicity to neuronal transmission, NO is synthesized from L-arginine by NO synthase (NOS). Here, we report the cloning of a Drosophila NOS gene, dNOS, located at cytological position 32B. The dNOS cDNA encodes a protein of 152 kDa, with 43% amino acid sequence identity to rat neuronal NOS. Like mammalian NOSs, DNOS protein contains putative binding sites for calmodulin, FMN, EAD, and NADPH, DNOS activity is Ca2+/calmodulin dependent when expressed in cell culture. An alternative RNA splicing pattern also exists for dNOS, which is identical to that for vertebrate neuronal NOS, These structural and functional observations demonstrate remarkable conservation of NOS between vertebrates and invertebrates. [References: 70]
机译:一氧化氮(NO)是一种细胞间信使,涉及哺乳动物生理学的各个方面,从血管舒张和巨噬细胞的细胞毒性到神经元传递,NO是由L-精氨酸通过NO合酶(NOS)合成的。在这里,我们报告了位于细胞学位置32B的果蝇NOS基因dNOS的克隆。 dNOS cDNA编码152 kDa的蛋白质,与大鼠神经元NOS的氨基酸序列同一性为43%。像哺乳动物的NOS一样,DNOS蛋白也包含钙调蛋白,FMN,EAD和NADPH的推定结合位点,当在细胞培养物中表达时,DNOS活性依赖于Ca2 + /钙调蛋白。 dNOS也存在另一种RNA剪接模式,与脊椎动物神经元NOS相同。这些结构和功能观察结果表明,脊椎动物和无脊椎动物之间NOS的保守性很高。 [参考:70]

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