Nejvíce citovaný článek - PubMed ID 11899467
Oxidation of lincomycin by hydrogen peroxide restricts its potential biotransformation with haloperoxidases
Streptomyces caelestis DSM 40084 produces two osmolytes, viz. 2-O-(alpha-D-glucopyranosyl)-zeta-glyceric acid (GG) and trehalose. Both compounds were isolated and identified by nuclear magnetic resonance spectroscopy and mass spectrometry. A very sensitive regulation of the cell osmolytes was demonstrated in exponentially growing cultures. The intracellular levels of GG and trehalose increased 2x in response to a step change of medium osmolarity caused by 0.3% NaCl. 1H NMR analysis of the cell extracts did not confirm the presence of additional osmolytes. GG is a S. caelestis metabolite commonly released from the cells; its concentration reached 3 g/L during the cultivation in a yeast extract--(NH4)2SO4-glycerol medium. This is the first report on the occurrence of the ionic osmolyte GG in the genus Streptomyces and on its free excretion to the medium.
- MeSH
- disacharidy izolace a purifikace MeSH
- extracelulární prostor chemie metabolismus MeSH
- glykosylace MeSH
- kultivační média chemie MeSH
- kyseliny glycerové agonisté chemie izolace a purifikace metabolismus MeSH
- magnetická rezonanční spektroskopie MeSH
- osmolární koncentrace MeSH
- osmóza MeSH
- Streptomyces chemie metabolismus MeSH
- trehalosa chemie izolace a purifikace metabolismus MeSH
- vodní a elektrolytová rovnováha * MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- disacharidy MeSH
- glyceric acid MeSH Prohlížeč
- kultivační média MeSH
- kyseliny glycerové MeSH
- trehalosa MeSH
A total of 307 new compounds, natural, semisynthetic or synthetic, were isolated at the Institute of microbiology during the last twelve years. Due to the development of separation (chromatographic) methods and of analytical methods used to determine the chemical structure of these compounds, i.e. NMR, MS and X-ray diffraction, many new metabolites could be described.
- MeSH
- biologické faktory chemie izolace a purifikace MeSH
- cyklické peptidy chemie izolace a purifikace MeSH
- enzymy chemie izolace a purifikace MeSH
- molekulární sekvence - údaje MeSH
- námelové alkaloidy chemie izolace a purifikace MeSH
- sacharidové sekvence MeSH
- sacharidy chemie izolace a purifikace MeSH
- sekvence aminokyselin MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- přehledy MeSH
- Názvy látek
- biologické faktory MeSH
- cyklické peptidy MeSH
- enzymy MeSH
- námelové alkaloidy MeSH
- sacharidy MeSH