Receptor-type guanylyl cyclase Gyc76C is required for development of the Drosophila embryonic somatic muscle.

Receptor-type guanylyl cyclase Gyc76C is required for development of the Drosophila embryonic somatic muscle.
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DOI:
10.1242/bio.2012943
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发表时间:
2012-06-15
期刊:
影响因子:
2.4
通讯作者:
Myat MM
Myat MM
中科院分区:
生物学4区
文献类型:
--
作者:
Patel U;Davies SA;Myat MM

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鸟苷酸环化酶介导许多生理过程,包括平滑肌功能和轴突导向。在这里,我们报告了果蝇受体型鸟苷酸环化酶在76 C,Gyc 76 C,在胚胎体细胞肌肉的发展新的作用。在缺乏Gyc 76 C或下游cGMP依赖性蛋白激酶(cGK)DG 1功能的胚胎中,体壁肌肉的图案化是异常的,腹侧肌群和侧肌群显示出最严重的缺陷。与此相反,规格和伸长的背斜肌和背急性肌的gyc 76 C突变体胚胎是正常的,相反,这些肌肉显示缺陷,在正确形成的肌腱连接(MTJs)。在gyc 76 C和pkg 21 D突变胚胎的MTJ形成过程中,βPS整合素亚基未能定位于MTJ,而是在肌管内的离散点中发现。组织特异性拯救实验表明,gyc 76 C功能在肌肉中是必要的,用于适当的图案化和βPS整联蛋白在MTJ的定位。这些研究提供了第一个证据Gyc 76 C和DG 1在果蝇体细胞肌肉发育的要求,并建议在运输和/或保留的整联蛋白受体亚基在发展中的MTJ的作用。
Guanylyl cyclases mediate a number of physiological processes, including smooth muscle function and axonal guidance. Here, we report a novel role for Drosophila receptor-type guanylyl cyclase at 76C, Gyc76C, in development of the embryonic somatic muscle. In embryos lacking function of Gyc76C or the downstream cGMP-dependent protein kinase (cGK), DG1, patterning of the somatic body wall muscles was abnormal with ventral and lateral muscle groups showing the most severe defects. In contrast, specification and elongation of the dorsal oblique and dorsal acute muscles of gyc76C mutant embryos was normal, and instead, these muscles showed defects in proper formation of the myotendinous junctions (MTJs). During MTJ formation in gyc76C and pkg21D mutant embryos, the βPS integrin subunit failed to localize to the MTJs and instead was found in discrete puncta within the myotubes. Tissue-specific rescue experiments showed that gyc76C function is required in the muscle for proper patterning and βPS integrin localization at the MTJ. These studies provide the first evidence for a requirement for Gyc76C and DG1 in Drosophila somatic muscle development, and suggest a role in transport and/or retention of integrin receptor subunits at the developing MTJs.
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