## Abstract The effect of carbon source on the regulation of pyrimidine biosynthesis in the opportunistic human pathogen __Pseudomonas oryzihabitans__ was studied at the level of enzyme synthesis. Although pyrimidine supplementation of glucose‐grown __Ps__. __oryzihabitans__ cells produced a slight
Control of pyrimidine biosynthesis in “Pseudomonas alkanolytica” ATCC 21034
✍ Scribed by Thomas P. West
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 116 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0233-111X
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✦ Synopsis
Abstract
The control of de novo pyrimidine biosynthesis in the industrially important patent strain “Pseudomonas alkanolytica” ATCC 21034 was investigated. Uracil supplementation of succinate‐grown “P. alkanolytica” cells produced the greatest depression of the de novo pyrimidine biosynthetic pathway enzyme activities. After the pyrimidine limitation of a “P. alkanolytica” orotate phosphoribosyltransferase mutant strain grown on succinate, the pyrimidine biosynthetic pathway enzyme activities were derepressed. The pyrimidine biosynthetic pathway enzyme aspartate transcarbamoylase in “P. alkanolytica” was inhibited by pyrophosphate, cytidine 5′‐triphosphate (CTP), uridine 5′‐triphosphate (UTP), and guanosine 5′‐triphosphate (GTP). (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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## Abstract The activity of the __de novo__ pyrimidine biosynthetic pathway in the MCF7 breast cancer cells was 4.4‐fold higher than that in normal MCF10A breast cells. Moreover, while pyrimidine biosynthesis in MCF10A was tightly regulated, increasing as the culture matured and subsequently down‐r