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Presence and tyrosine phosphorylation of c-met receptor in human sperm
tyrosine phosphorylation c-met receptor human sperm
2009/2/18
The c-met receptor is a p190MET tyrosine kinase proto-oncoprotein that through its binding to its ligand, designated hepatocyte growth factor (HGF), induces mitogenic, motogenic, and morphogenic act...
Regulation of sperm function by protein tyrosine phosphorylation in diverse wild felid species
Cat cAMP capacitation
2009/2/18
Protein tyrosine phosphorylation is associated with sperm capacitation and the acrosome reaction in several mammalian species. Changes in phosphorylation of a 95-kDa protein in human, mouse, and d...
Interaction between Ca2+, cyclic 3',5' adenosine monophosphate, the superoxide anion, and tyrosine phosphorylation pathways in the regulation of human sperm capacitation
Calmodulin phosphatase kinase
2009/2/17
In order to fertilize the egg, spermatozoa must go through the capacitation process where they experience Ca2+ uptake, increases in cyclic 3',5' adenosine monophosphate (cAMP) concentrations, supe...
Compromised sperm protein phosphorylation after capacitation, swim-up, and zona pellucida exposure in teratospermic domestic cats
Cat sperm teratospermia tyrosine phosphorylation zona pellucida
2009/2/16
Tyrosine phosphorylated proteins recently have been found in mouse and human spermatozoa. Our objectives were to (1) determine if domestic cat spermatozoa also express tyrosine phosphorylated pro...
Atrial natriuretic factor inhibits the phosphorylation of protein kinase C in plasma membrane preparations of cultured Leydig tumor cells
Atrial natriuretic factor protein kinase C Leydig tumor cells cGMP plasma membranes
2009/2/12
The peptide hormone atrial natriuretic factor (ANF) exerts its effect in a receptor-mediated fashion and the membrane-bound form of guanylate cyclase represents a biologically active ANF receptor;...
A redox-regulated tyrosine phosphorylation cascade in rat spermatozoa
Epididymal maturation cAMP-dependent phosphorylation
2008/12/29
Rat spermatozoa from both the caput and cauda epididymidis were shown to generate superoxide anion (O2-.) both spontaneously and following stimulation with NAD(P)H. Caput spermatozoa gave a signific...
Testicular Torsion Alters the Presence of Specific Proteins in the Mouse Testis as Well as the Phosphorylation Status of Specific Proteins
Oxidative stress testicular proteins
2008/12/23
Testicular torsion followed by torsion repair induces an ischemia-reperfusion injury to the testis that can render the testis aspermatogenic. Previous results have demonstrated this loss of sp...
Changes in Sperm Glycogen Synthase Kinase-3 Serine Phosphorylation and Activity Accompany Motility Initiation and Stimulation
Epididymis protein kinase B phosphoinositide 3-kinase
2008/12/22
Sperm motility is regulated by protein phosphorylation. We have shown that the signaling kinase, glycogen synthase kinase-3 (GSK-3), is present in spermatozoa. In somatic cells, GSK-3 is regulated b...
Inhibitors of Phosphoinositide 3-Kinase, LY294002 and Wortmannin, Affect Sperm Capacitation and Associated Phosphorylation of Proteins Differently：Ca2+-Dependent Divergences
Spermatozoa signal transduction Akt
2008/12/22
Sperm capacitation is regulated by multiple pathways that also control sperm motility and tyrosine (Tyr) phosphorylation of several sperm proteins. Among the reported pathways, phosphoinositide 3-ki...
Viability and Protein Phosphorylation Patterns of Boar Spermatozoa Agglutinated by Treatment With a Cell-Permeable Cyclic Adenosine 3',5'-Monophosphate Analog
Serine/threonine phosphorylation tyrosine phosphorylation hyperactivation
2008/12/19
Boar spermatozoa become agglutinated with one another at the head when their intracellular cyclic adenosine 3',5'-monophosphate (cAMP)-signaling cascades are activated in the head. The aim of the ...
Specific Order in the Appearance of Protein Tyrosine Phosphorylation Patterns Is Functionally Coordinated With Dog Sperm Hyperactivation and Capacitation
Kinetics hyperactivation membrane destabilization sperm function phosphorylation
2008/12/19
The aims of the present study were to characterize a slow capacitation system that records initial changes in the sperm membrane state, and, using a canine model, to order the specific protein tyros...