Results 181 to 190 of about 18,289 (229)
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Demineralization of Bone by Phosphoprotein Phosphatase
Journal of Dental Research, 1970Because of recent observations of the demineralization of enamel by phosphoprotein phosphatase, an experiment was designed to test this enzyme on bone. Decided destruction was evident in bone fragments that were incubated with phosphoprotein phosphatase buffered to pH 5.8 with 0.1 M acetate for periods of up to 15 hours.
S N, Kreitzman, M E, Fritz
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Inactivation and reactivation of phosphoprotein phosphatase
Molecular and Cellular Biochemistry, 1982The catalytic subunit of phosphoprotein phosphatase (Mr = 35,000) is inactivated by phosphate compounds such as trimetaphosphate, PPi, and ATP. The inactivation of phosphoprotein phosphatase by these phosphate compounds is time- and concentration-dependent, is not reversed by dilution or gel filtration and is protected by Pi.
S C, Yan, D J, Graves
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Regulation of phosphoprotein phosphatase by somatostatin
Biochemical Medicine, 1984Cyclic somatostatin inhibited phosphoprotein phosphatase activity in rat liver slices, as well as a partially purified phosphoprotein phosphatase from rat liver. This change was accompanied by a concomitant decrease in cyclic AMP-dependent protein kinase. Studies in vivo showed similar trends in the variation of both enzymes.
R E, Catalan +5 more
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Phosphoprotein phosphatase activity of bovine intestinal alkaline phosphatase
Experientia, 1981The phosphoprotein phosphatase activity of a commercial preparation of bovine intestinal alkaline phosphatase (EC 3.1.3.1) was examined using phosvitin and dentine phosphoprotein as substrates. Over 90% and 70% of the phosphorus from dentine phosphoprotein and phosvitin were hydrolyzed in 2 h.
M, Harada +3 more
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Rabbit liver membrane phosphoprotein phosphatase
Archives of Biochemistry and Biophysics, 1977An investigation of phosphoprotein phosphatase activity in rabbit liver membrane using 32P-labeled histone and phosphorylase as substrates has shown that the activity is inhibited by preincubation in a phosphorylating system containing ATP or GTP as well as in the presence of physiological concentrations of inorganic phosphate.
P P, Layne, V A, Najjar
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Chloroplast Phosphoproteins. Evidence for a Thylakoid‐Bound Phosphoprotein Phosphatase
European Journal of Biochemistry, 1980Isolated intact pea (Pisum sativum) chloroplasts incorporate [32P]orthophosphate into several thylakoid polypeptides in the light. Transfer of the labelled chloroplasts to darkness results in rapid dephosphorylation of the polypeptides. The most rapidly dephosphorylated phosphoproteins are the 26000‐Mr doublet derived from the light‐harvesting ...
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Phosphoprotein phosphatase of bovine epididymal spermatozoa
Biochemical and Biophysical Research Communications, 1975Summary A protein phosphatase which dephosphorylates proteins phosphorylated by cAMP-dependent protein kinase from sperm has been identified in sonic extracts of bovine epididymal spermatozoa (BES). Phosphate-labeling experiments indicate that the protein phosphatase regulates the rates of phosphorylation and dephosphorylation of sperm proteins. The
F Y, Tang, D D, Hoskins
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Evidence for phosphoprotein phosphatase inStreptomyces granaticolor
Folia Microbiologica, 2000The existence of phosphoprotein phosphatase (PPP) in aerial mycelium of S. granaticolor was demonstrated. Using inhibitors of serine and/or threonine PPP and specifically labeled substrate it was found that the PPP is of the serine and/or threonine type.
J, Bobek +5 more
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Phosphoprotein Phosphatase 1 Complexes in Spermatogenesis
Current Molecular Pharmacology, 2015The major post-translational modification in eukaryotes is protein phosphorylation which mediates responses to signals in a myriad of cellular processes. Not surprisingly, many steps in spermatogenesis involve the concerted action of the protein (de)phosphorylation key players, kinases and phosphatases.
Joana V, Silva +2 more
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Phosphoprotein Inhibitors of Protein Phosphatase-1
2003Publisher Summary The chapter discusses phosphoprotein inhibitors of protein phosphatase-1(PP1). Over 25 years ago, a search for proteins that could regulate phosphorylase phosphatase yielded heat-stable proteins that were called “inhibitor-1” (I-1) and “inhibitor-2” (I-2).
Masumi, Eto +3 more
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