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Globins and nitric oxide homeostasis in fish embryonic development

机译:鱼类胚胎发育中的割球球和一氧化氮稳态

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摘要

Since the discovery of new members of the globin superfamily such as Cytoglobin, Neuroglobin and Globin X, in addition to the most well-known members, Hemoglobin and Myoglobin, different hypotheses have been suggested about their function in vertebrates. Globins are ubiquitously found in living organisms and can carry out different functions based on their ability to bind ligands such as O-2, and nitric oxide (NO) and to catalyze reactions scavenging NO or generating NO by reducing nitrite. NO is a highly diffusible molecule with a central role in signaling important for egg maturation, fertilization and early embryonic development. The globins ability to scavenge or generate NO makes these proteins ideal candidates in regulating NO homeostasis depending on the micro environment and tissue NO demands. Different amounts of various globins have been found in zebrafish eggs and developing embryos where it's unlikely that they function as respiratory proteins and instead could play a role in maintaining embryonic NO homeostasis. Here we summarize the current knowledge concerning the role of NO in adult fish in comparison to mammals and we discuss NO function during embryonic development with possible implications for globins in maintaining embryonic NO homeostasis.
机译:自从最着名的成员,血红蛋白和肌蛋白外,血红蛋白,神经雪蛋白和珠蛋白X的新成员以来,血红蛋白和肌球蛋白外,已经提出了对脊椎动物中的不同假设。在生物体中普遍存在的剥离球,可以基于其结合配体如O-2和一氧化氮(NO)的能力进行不同的功能,并通过减少亚硝酸盐来催化清除扫除的反应或产生不产生的。 NO是一种高度扩散的分子,其在信号传导中具有核心作用,对于鸡蛋成熟,施肥和早期胚胎发育很重要。割球能力清除或产生的能力不会使这些蛋白质是根据微环境和组织进行调节的理想候选者,这是不需要的。在斑马鱼卵中发现了不同量的各种苗鱼,在胚胎中发育胚胎,它们不太可能用作呼吸蛋白,而是可以在维持胚胎没有稳态中发挥作用。在这里,我们总结了关于哺乳动物的成人鱼中否的作用的目前的知识,并且我们在胚胎发育期间讨论了在粒引起的胚胎中的可能影响,在保持胚胎没有稳态中的胚胎发育中没有任何功能。

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