التفاصيل البيبلوغرافية
العنوان: |
Biochemical communication between filament‐forming enzymes: Potential Regulatory Roles of Metabolites in Enzyme Co‐assemblies with CTP Synthase. |
المؤلفون: |
Bearne, Stephen L. |
المصدر: |
BioEssays; Aug2024, Vol. 46 Issue 8, p1-12, 12p |
مصطلحات موضوعية: |
PROLINE metabolism, KREBS cycle, METABOLITES, CONDITIONED response, ENZYMES |
مستخلص: |
A host of metabolic enzymes reversibly self‐assemble to form membrane‐less, intracellular filaments under normal physiological conditions and in response to stress. Often, these enzymes reside at metabolic control points, suggesting that filament formation affords an additional regulatory mechanism. Examples include cytidine‐5′‐triphosphate (CTP) synthase (CTPS), which catalyzes the rate‐limiting step for the de novo biosynthesis of CTP; inosine‐5′‐monophosphate dehydrogenase (IMPDH), which controls biosynthetic access to guanosine‐5′‐triphosphate (GTP); and ∆1‐pyrroline‐5‐carboxylate (P5C) synthase (P5CS) that catalyzes the formation of P5C, which links the Krebs cycle, urea cycle, and proline metabolism. Intriguingly, CTPS can exist in co‐assemblies with IMPDH or P5CS. Since GTP is an allosteric activator of CTPS, the association of CTPS and IMPDH filaments accords with the need to coordinate pyrimidine and purine biosynthesis. Herein, a hypothesis is presented furnishing a biochemical connection underlying co‐assembly of CTPS and P5CS filaments – potent inhibition of CTPS by glutamate γ‐semialdehyde, the open‐chain form of P5C. [ABSTRACT FROM AUTHOR] |
|
Copyright of BioEssays is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Complementary Index |