发明名称 |
Engineering the production of a conformational variant of occidiofungin that has enhanced inhibitory activity against fungal species |
摘要 |
Occidiofungin is a cyclic nonribosomally synthesized antifungal peptide with submicromolar activity. This invention is directed to compositions enriched for particular occidiofungin diastereomers/conformers, methods of making compositions enriched for particular diastereomers/conformers and microorganisms suitable for producing enriched compositions of particular diastereomers/conformers. Methods of treating fungal infections or plants infected by fungi are also provided. |
申请公布号 |
US9624270(B2) |
申请公布日期 |
2017.04.18 |
申请号 |
US201314090679 |
申请日期 |
2013.11.26 |
申请人 |
MISSISSIPPI STATE UNIVERSITY;THE TEXAS A&M UNIVERSITY SYSTEM |
发明人 |
Smith James Leif;Ravichandran Akshaya;Lu Shien;Gu Ganyu |
分类号 |
C07K7/54;A61K38/12;A01N43/713;A01N63/00;A01N63/02;C12N9/16;C07K7/56 |
主分类号 |
C07K7/54 |
代理机构 |
Butler Snow LLP |
代理人 |
Butler Snow LLP |
主权项 |
1. A method of increasing production of occidiofungin diastereomers/conformers corresponding to the diastereomers/conformers having the total correlation spectroscopy (TOCSY) fingerprint set forth in FIG. 5C as the green NH correlations in a microorganism producing occidiofungin comprising:
decreasing the thioesterase activity of an occidiofungin gene D (ocfD) product (OcfD) in said microorganism, wherein said OcfD thioesterase activity is decreased by the introduction of a point mutation at the serine in position 2954 of the amino acid sequence of SEQ ID NO: 4, said point mutation replaces said serine with an alanine, glycine or proline, and culturing said microorganism under conditions to produce said occidiofungin diastereomers/conformers, wherein said increase in production of occidiofungin diastereomers/conformers is as compared to a reference microorganism without said decrease in OcfD thioesterase activity cultured under the same conditions. |
地址 |
Starkville MS US |