Synthesis and Characterization of New Photolabile Phorbol Esters for Affinity Labeling of Protein Kinase C

1996 ◽  
Vol 61 (6) ◽  
pp. 2164-2173 ◽  
Author(s):  
Kazuhiro Irie ◽  
Takashi Ishii ◽  
Hajime Ohigashi ◽  
Paul A. Wender ◽  
Benjamin L. Miller ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Phorbol Esters ◽  
Synthesis And Characterization ◽  
Affinity Labeling ◽  
Kinase C

Isolation and characterization of PKC-L, a new member of the protein kinase C-related gene family specifically expressed in lung, skin, and heart

1991 ◽  
Vol 11 (1) ◽  
pp. 126-133 ◽  
Author(s):  
N Bacher ◽  
Y Zisman ◽  
E Berent ◽  
E Livneh
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Gene Family ◽  
Phorbol Esters ◽  
Structural Features ◽  
Cos Cells ◽  
Isolation And Characterization ◽  
Kinase C ◽  
Human Epidermoid Carcinoma

We have isolated and characterized a new human cDNA, coding for a protein kinase, related to the protein kinase C (PKC) gene family. Although this protein kinase shares some homologous sequences and structural features with the four members of the PKC family initially isolated (alpha, beta I, beta II, and gamma), it shows more homology with the recently described PKC-related subfamily, encoded by the cDNAs delta, epsilon, and zeta. The transcript for this gene product, termed PKC-L, is most abundant in lung tissue, less expressed in heart and skin tissue, and exhibited very low expression in brain tissue. Thus, its tissue distribution is different from that described for other mammalian members of the PKC gene family, their expression being enriched in brain tissues. PKC-L is also expressed in several human cell lines, including the human epidermoid carcinoma line A431. The ability of phorbol esters to bind to and stimulate the kinase activity of PKC-L was revealed by introducing the cDNA into COS cells.

scholarly journals A growth factor-repressible gene associated with protein kinase C-mediated inhibition of adipocyte differentiation.

1988 ◽  
Vol 107 (1) ◽  
pp. 279-286 ◽  
Author(s):  
M Navre ◽  
G M Ringold
Keyword(s):  
Protein Kinase C ◽  
Growth Factor ◽  
Protein Kinase ◽  
Fibroblast Growth Factor ◽  
Basic Fibroblast Growth Factor ◽  
Phorbol Esters ◽  
Adipocyte Differentiation ◽  
Fibroblast Growth ◽  
Kinase C

The conversion of determined adipoblasts to fully differentiated adipocytes requires appropriate environmental conditions. A strict dependence on cell confluence and a facilitation by glucocorticoid hormones have previously been described. We have found that agents that are capable of activating protein kinase C, such as basic fibroblast growth factor and phorbol esters, inhibit the differentiation of the adipogenic cell line TA1 without stimulating cell growth. Here we describe the sequence and characterization of a cDNA (clone 5) that detects an RNA, the expression of which is enhanced by glucocorticoids and increasing cell density. In contrast, activators of protein kinase C including basic fibroblast growth factor, phorbol esters, and synthetic diacylglycerols inhibit clone 5 gene expression. It appears that clone 5 expression is closely linked to environmental and hormonal factors that promote the differentiation of adipogenic cells.

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