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果蝇腺苷酸环化酶的遗传剖析

Genetic dissection of Drosophila adenylate cyclase.

作者信息

Livingstone M S

出版信息

Proc Natl Acad Sci U S A. 1985 Sep;82(17):5992-6. doi: 10.1073/pnas.82.17.5992.

Abstract

The Drosophila learning mutant rutabaga is missing calcium/calmodulin activation of adenylate cyclase (EC4.6.1.1). The mutation was mapped at a finer resolution to X chromosome bands 12F5-7. By comparing wild-type and mutant cyclase activities, the relative responsiveness of the calcium-sensitive and calcium-insensitive components to different ligands could be determined; the calcium-sensitive fraction of the total cyclase activity was significantly less responsive to guanyl nucleotides and monoamines. The results suggest that the component of cyclase activity that is stimulated by calcium/calmodulin, possibly a genetically distinct catalytic subunit, is not coupled to the G subunit or the G subunit/monoamine receptor complex.

摘要

果蝇学习突变体芜菁缺失腺苷酸环化酶(EC4.6.1.1)的钙/钙调蛋白激活。该突变以更高分辨率定位到X染色体的12F5 - 7带。通过比较野生型和突变型环化酶活性,可以确定钙敏感和钙不敏感成分对不同配体的相对反应性;总环化酶活性中钙敏感部分对鸟苷酸和单胺的反应性明显较低。结果表明,由钙/钙调蛋白刺激的环化酶活性成分,可能是一个基因上不同的催化亚基,不与G亚基或G亚基/单胺受体复合物偶联。

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