Parallel Evolution of Sperm Hyper-Activation Ca2+ Channels
نویسندگان
چکیده
منابع مشابه
Parallel Evolution of Sperm Hyper-Activation Ca2+ Channels
Sperm hyper-activation is a dramatic change in sperm behavior where mature sperm burst into a final sprint in the race to the egg. The mechanism of sperm hyper-activation in many metazoans, including humans, consists of a jolt of Ca2+ into the sperm flagellum via CatSper ion channels. Surprisingly, all nine CatSper genes have been independently lost in several animal lineages. In Drosophila, sp...
متن کاملCa2+ channels from the sea urchin sperm plasma membrane
Ca2+ influx across the sea urchin sperm plasma membrane is a necessary step during the egg jelly-induced acrosome reaction. There is pharmacological evidence for the involvement of Ca2+ channels in this influx, but their presence has not been directly demonstrated because of the small size of this cell. Sea urchin sperm Ca2+ channels are being studied by fusing isolated plasma membranes into pl...
متن کاملEvidence for the activation of two different Ca2+ channels during the egg jelly-induced acrosome reaction of sea urchin sperm.
The influx of Ca2+ and its subsequent intracellular increase are required for the acrosome reaction of sea urchin sperm to occur. Spermatozoa must undergo this reaction, which is triggered by the egg jelly, in order to fertilize the egg. Here, the egg jelly-induced Ca2+ influx mechanisms have been studied in sperm loaded with FURA-2 using Mn2+ under the assumption that this divalent ion is an i...
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A new class of parallel algorithms is introduced that can achieve a complexity of O(n 3 2 ) with respect to the interprocessor communication, in the exact computation of systems with pairwise mutual interactions of all elements. Hitherto, conventional methods exhibit a communicational complexity of O(n). The amount of computation operations is not altered for the new algorithm which can be form...
متن کاملRapid Gene Family Evolution of a Nematode Sperm Protein Despite Sequence Hyper-conservation
Reproductive proteins are often observed to be the most rapidly evolving elements within eukaryotic genomes. The major sperm protein (MSP) is unique to the phylum Nematoda and is required for proper sperm locomotion and fertilization. Here, we annotate the MSP gene family and analyze their molecular evolution in 10 representative species across Nematoda. We show that MSPs are hyper-conserved ac...
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ژورنال
عنوان ژورنال: Genome Biology and Evolution
سال: 2017
ISSN: 1759-6653
DOI: 10.1093/gbe/evx131