| Admin | Дата: Суббота, 18.09.2010, 17:25 | Сообщение # 1 |
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| fmyykjn | Дата: Понедельник, 02.03.2015, 18:14 | Сообщение # 2 |
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Группа: Гости
| Daptomycin is a cyclic lipopeptide antibiotic produced close to the body Streptomyces roseosporus.<>4 - <>5 - Daptomycin consists of thirteen amino acids, ten of which are arranged in a cyclic the craze, and three that adorn an exocyclic tail. Two non-proteinogenic amino acids get by in the lipopeptide, the unusual amino acid L-kynurenine (Kyn), however known to Daptomycin, and L-3-methylglutamic acid (mGlu). The N-terminus of the exocyclic tryptophan residue is coupled to decanoic acid, a average chain (C10) fatty acid. Biosynthesis is initiated alongside the coupling of decanoic acid to the N-terminal tryptophan, followed beside the coupling of the leftover amino acids past nonribosomal peptide synthetase (NRPS) mechanisms. Decisively, a cyclization effect come what may occurs, which is catalyzed by a thioesterase enzyme, and future unchain of the lipopeptide is granted.
The non-ribosomal peptide synthetase (NRPS) liable benefit of the fusion of Daptomycin is encoded by three overlapping genes, dptA, dptBC and dptD. The dptE and dptF genes, without hesitation upstream of dptA, are favoured to be involved in the initiation of daptomycin biosynthesis on coupling decanoic acid to the N-terminal Trp.<>6 - These best-seller genes (dptE, dptF ) be in touch to products that most likely industry in conjunction with a incomparable condensation specialization to acylate the first amino acid (tryptophan). These and other untested genes (dptI, dptJ) are believed to be tangled in supplying the non-proteinogenic amino acids L-3-methylglutamic acid and Kyn; they are located next to the NRPS genes.<>6 -
From http://www.tcsindustry.com - TCS INDUSTRY LTD
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