Chemical derivation methods were used to prepare milbemycins beta9 and beta10 from milbemycins A3 and A4. Their acaricidal activities were also assessed against the organophosphorus-sensitive two-spotted spider mite (Tetranychus urticae) on primary leaves of cowpea plants (Vigna sinesis Savi species) by spraying.
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http://dx.doi.org/10.1271/bbb.66.1407 | DOI Listing |
Mol Microbiol
August 2012
The Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
Overexpression of the Candida albicans ATP-binding cassette transporter CaCdr1p causes clinically significant resistance to azole drugs including fluconazole (FLC). Screening of a ~1.89 × 10(6) member D-octapeptide combinatorial library that concentrates library members at the yeast cell surface identified RC21v3, a 4-methoxy-2,3,6-trimethylbenzenesulphonyl derivative of the D-octapeptide D-NH(2) -FFKWQRRR-CONH(2) , as a potent and stereospecific inhibitor of CaCdr1p.
View Article and Find Full Text PDFAppl Environ Microbiol
May 2010
School of Life Science & Biotechnology and Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200030, China.
Five meilingmycins, A to E, with A as the major component, were isolated from Streptomyces nanchangensis NS3226. Through nuclear magnetic resonance (NMR) characterization, meilingmycins A to E proved to be identical to reported milbemycins alpha11, alpha13, alpha14, beta1, and beta9, respectively. Sequencing of a previously cloned 103-kb region identified three modular type I polyketide synthase genes putatively encoding the last 11 elongation steps, three modification proteins, and one transcriptional regulatory protein for meilingmycin biosynthesis.
View Article and Find Full Text PDFBiosci Biotechnol Biochem
June 2002
Agroscience Research Laboratories, Sankyo Co. Ltd., Shiga, Japan.
Chemical derivation methods were used to prepare milbemycins beta9 and beta10 from milbemycins A3 and A4. Their acaricidal activities were also assessed against the organophosphorus-sensitive two-spotted spider mite (Tetranychus urticae) on primary leaves of cowpea plants (Vigna sinesis Savi species) by spraying.
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