Butanolides
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Study about the synthesis of autoregulators butyrolactones of the Streptomyces bacteria. / Estudos sobre a síntese de butirolactonas auto-reguladoras de bactérias Streptomyces.
Streptomycetes are Gram-positive filamentous bacteria well known for the ability to produce a wide variety of secondary metabolites and biologically active substances. These activities are controlled by low-molecular-weight compounds called butyrolactone autoregulators. The greater number of these compounds with autoregulators properties have as common chara
Publicado em: 2007
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2. Constituintes químicos dos frutos de Iryanthera paraensis Huber / Chemical constituints of Iryanthera paraensis Huber
Os frutos de Iryanthera paraensis Huber foram separados em suas partes constituintes e de seu pericarpo foi obtido o extrato clorofórmico que, por cromatografia e purificação em CLAE, forneceu cinco substâncias inéditas (uma neolignana e quatro γ-butanolidos): Eu-IP: reI (7S,8R)-4-hidroxi-3,5-dimetoxi-Δ1,3,5,1,3,5,7- 7.O.3,8.O.4-neolignana. A-
Publicado em: 1995
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3. Butyrolactone autoregulator receptor protein (BarA) as a transcriptional regulator in Streptomyces virginiae.
BarA of Streptomyces virginiae is a specific receptor protein for virginiae butanolides (VBs), a member of the butyrolactone autoregulators of Streptomyces species. Sequencing around the barA gene revealed two novel open reading frames: one upstream, barX, encoding a homolog of AfsA of Streptomyces griseus and another downstream, barB. Northern (RNA) blot an
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4. Gene Replacement Analysis of the Streptomyces virginiae barA Gene Encoding the Butyrolactone Autoregulator Receptor Reveals that BarA Acts as a Repressor in Virginiamycin Biosynthesis
Virginiae butanolides (VBs), which are among the butyrolactone autoregulators of Streptomyces species, act as a primary signal in Streptomyces virginiae to trigger virginiamycin biosynthesis and possess a specific binding protein, BarA. To clarify the in vivo function of BarA in the VB-mediated signal pathway that leads to virginiamycin biosynthesis, two bar
American Society for Microbiology.