公开(公告)号：US20110293566A1

公开(公告)日：2011-12-01

申请号：US13117467

申请日：2011-05-27

Applicant: Dean M. SCHOLL ,  Dana M. Gebhart ,  Steven R. Williams ,  Gregory R. Govoni ,  David W. Martin, JR.

Inventor： Dean M. SCHOLL ,  Dana M. Gebhart ,  Steven R. Williams ,  Gregory R. Govoni ,  David W. Martin, JR.

IPC: A61K38/16 ,  C07K14/33 ,  C12P21/02 ,  A61K35/00 ,  C12N15/74 ,  C12N1/21 ,  C07H21/04 ,  A61P31/04

CPC classification number: C07K14/33

Abstract: This disclosure relates to the discovery and isolation of the entire cluster of genes encoding R-type high molecular weight bacteriocins that specifically kill Clostridium difficile bacteria, dangerous human pathogens. Also disclosed are methods of producing the R-type bacteriocins in innocuous producer cells that, unlike C. difficile, do not die in the presence of oxygen. Disclosed also is the specific gene of the isolated gene cluster that determines the killing spectrum of the R-type bacteriocin and the demonstration that the killing spectra of diffocins can be altered by engineering orf1374 of the diffocin genetic locus. This invention offers a potent bactericidal agent and a means to make it in order to kill selectively C. difficile bacteria in the environment of the gastrointestinal tract where they can cause great harm and even death of the infected patient or farm animal.

Abstract translation: 本公开涉及发现和分离编码特异性杀伤艰难梭菌（Clostridium difficile bacteria），危险人类病原体的R型高分子量细菌素的整个基因簇。 还公开了在无害生物细胞中生产R型细菌素的方法，其与艰难梭菌不同，不在氧的存在下死亡。 还公开了分离的基因簇的特异性基因，其确定了R型细菌素的杀伤谱，并且证明了可以通过工程化的diffocin遗传基因座的orf1374改变diffocins的杀伤谱。 本发明提供了一种有效的杀菌剂和一种使其成为在肠胃环境中选择性杀死艰难梭菌的细菌的手段，在这些细菌中它们可能会对受感染的病人或农场动物造成极大的伤害甚至死亡。

公开(公告)号：US20080171376A1

公开(公告)日：2008-07-17

申请号：US11929867

申请日：2007-10-30

Applicant: Dean M. SCHOLL ,  Steven R. WILLIAMS

Inventor： Dean M. SCHOLL ,  Steven R. WILLIAMS

IPC: C12N1/20 ,  C07H21/00 ,  C12N7/00 ,  C07K14/00

CPC classification number: C07K14/21 ,  C07K2319/35 ,  C07K2319/74

Abstract: Modified forms of naturally occurring bacteriocins, such as the R-type pyocins of Pseudomonas aeruginosa, are disclosed as are methods for producing them in GRAS organisms. The bacteriocins are modified at the ends of their tail fibers in a region responsible for binding specificity and affinity to their cognate binding partners, or receptors, such as those on the surface of bacteria. Methods for the use of the modified bacteriocins, such as to bind receptors, including virulence or fitness factors, on the surfaces of bacteria, are also described.

Abstract translation: 公开了天然存在的细菌素的修饰形式，例如绿脓假单胞菌的R型py霉素，作为在GRAS生物体中生产它们的方法。 细菌素在其尾纤维的末端被修饰，负责对其同源结合配偶体或受体（例如细菌表面上的那些）的结合特异性和亲和力。 还描述了在细菌表面上使用修饰的细菌素，例如结合受体（包括毒力或适应因子）的方法。