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Role of Posttranslational Protein Modifications In Epididymal Sperm Maturation and Extracellular Quality Control

机译:翻译后蛋白修饰在附睾精子成熟和细胞外质量控制中的作用

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摘要

The epididymal lumen is a complex microenvironment in which spermatozoa acquire motility and fertility. Spermatozoa are synthetically inactive and therefore the maturation process requires their interaction with proteins that are synthesized and secreted in a highly regionalized manner by the epididymal epithelium. In addition to the integration of epididymal secretory proteins, post-translational modifications of existing sperm proteins are important for sperm maturation and acquisition of fertilizing potential. Phosphorylation, glycosyl-ation, and processing are several of the posttranslational modifications that sperm proteins undergo during epididymal transit resulting in changes in protein function and localization ultimately leading to mature spermatozoa. In addition to these well-characterized modifications, protein aggregation and cross-linking also occur within the epididymal lumen and may represent unique mechanisms for controlling protein function including that for maturation as well as for extracellular quality control.
机译:附睾管腔是复杂的微环境,其中精子获得运动力和繁殖力。精子在合成上是无活性的,因此成熟过程需要它们与附睾上皮以高度区域化的方式合成和分泌的蛋白质相互作用。除了整合附睾分泌蛋白外,现有精子蛋白的翻译后修饰对于精子成熟和获得受精潜力也很重要。磷酸化,糖基化和加工是精子蛋白在附睾转运过程中经历的几种翻译后修饰,导致蛋白功能和定位的改变,最终导致成熟的精子。除了这些特征明确的修饰之外,附睾管腔内还发生蛋白质聚集和交联,并且可能代表了控制蛋白质功能的独特机制,包括用于成熟以及细胞外质量控制的机制。

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