S-adenosylmethionine-responsive cystathionine 尾-synthase modulates sulfur metabolism and redox balance in Mycobacterium tuberculosis was written by Bandyopadhyay, Parijat;Pramanick, Ishika;Biswas, Rupam;P. S., Sabarinath;Sreedharan, Sreesa;Singh, Shalini;Rajmani, Raju S.;Laxman, Sunil;Dutta, Somnath;Singh, Amit. And the article was included in Science Advances in 2022.Application of 54-47-7 The following contents are mentioned in the article:
Methionine and cysteine metabolisms are important for the survival and pathogenesis of Mycobacterium tuberculosis (Mtb). The transsulfuration pathway converts methionine to cysteine and represents an important link between antioxidant and methylation metabolism in diverse organisms. Using a combination of biochem. and cryo-electron microscopy, we characterized the first enzyme of the transsulfuration pathway, cystathionine 尾-synthase (MtbCbs) in Mtb. We demonstrated that MtbCbs is a heme-less, pyridoxal-5鈥?phosphate-containing enzyme, allosterically activated by S-adenosylmethionine (SAM). The at. model of MtbCbs in its native and SAM-bound conformations revealed a unique mode of SAM-dependent allosteric activation. Further, SAM stabilized MtbCbs by sterically occluding proteasomal degradation, which was crucial for supporting methionine and redox metabolism in Mtb. Genetic deficiency of MtbCbs reduced Mtb survival upon homocysteine overload in vitro, inside macrophages, and in mice coinfected with HIV. Thus, the MtbCbs-SAM axis constitutes an important mechanism of coordinating sulfur metabolism in Mtb. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Application of 54-47-7).
(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Application of 54-47-7