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PEP (phosphoenol pyruvate) group translocation, also known as the phosphotransferase system or PTS, is a distinct method used by bacteria for sugar uptake where the source of energy is from phosphoenolpyruvate (PEP). It is known to be a multicomponent system that always involves enzymes of the plasma membrane and those in the cytoplasm.
The reaction catalyzed by pyruvate kinase is the final step of glycolysis. It is one of three rate-limiting steps of this pathway. Rate-limiting steps are the slower, regulated steps of a pathway and thus determine the overall rate of the pathway. In glycolysis, the rate-limiting steps are coupled to either the hydrolysis of ATP or the ...
Polyestradiol phosphate (PEP), sold under the brand name Estradurin, is an estrogen medication which is used primarily in the treatment of prostate cancer in men. [1] [9] [2] [10] It is also used in women to treat breast cancer, as a component of hormone therapy to treat low estrogen levels and menopausal symptoms, and as a component of feminizing hormone therapy for transgender women.
It has been shown that in human tumor samples and human cancer cell lines (breast, colon and lung cancer cells) PEPCK-M, and not PEPCK-C, was expressed at enough levels to play a relevant metabolic role. [1] [23] Therefore, PEPCK-M could have a role in cancer cells, especially under nutrient limitation or other stress conditions.
Following binding, and while the binding site is facing the same way, the carrier will capture or occlude (take in and retain) the substrate within its molecular structure and cause an internal translocation so that the opening in the protein now faces the other side of the plasma membrane. [12]
The cancer signaling pathways were developed in collaboration with the Computational Biology Center at Memorial Sloan–Kettering Cancer Center and with Bader Lab at the University of Toronto for the "Cancer Cell Map". The following cancer signaling pathways are hosted by Netpath: Epidermal growth factor receptor Pathway [14]
The ATPase activity of Sav1866 is known to be stimulated by cancer drugs such as doxorubicin, vinblastine and others, [75] which suggests similar substrate specificity to P-glycoprotein and therefore a possible common mechanism of substrate translocation. Sav1866 is a homodimer of half transporters, and each subunit contains an N-terminal TMD ...
Interaction between the two metabolic pathways can be studied by using 13 C-glucose isotopomers. [10] In higher plants, the MEP pathway operates in plastids while the mevalonate pathway operates in the cytosol. [9] Examples of bacteria that contain the MEP pathway include Escherichia coli and pathogens such as Mycobacterium tuberculosis.