三个新的二酮哌嗪(1 - 3),环(升-Pro- d -反式-Hyp)(1),环(升-Pro- d -Glu)(2),和环(d -Pro- d -Glu) (3)和5种已知的二酮哌嗪(4 - 8)从endolichenic真菌分离Colpoma藻。从哥斯达黎加植物Henriettea tuberculosa(Melatomataceae)鉴定出的CR1465A。新化合物的结构1 - 3使用广泛的光谱分析(包括2D NMR和HR-MS)进行了阐明,并通过结合NOESY分析和Marfey方法确定了它们的绝对构型。环(升-Pro- d -异基因-苏)(4)最近从中国南海海绵隔离Callyspongia。SP,但它的NMR光谱数据未报告和环(升-Pro-升-Asp)(5)以前曾报道过,但仅作为合成产品。化合物4和5的NMR数据分配是第一次报告。测试所有分离出的化合物的抗真菌和抗菌性能。
A comparative study of antimicrobial properties of cyclo(l-Pro- l-Asp) with its 2-ketopiperazine analog
摘要:
Cyclo(l-Pro- l-Asp) diketopiperazine was synthesized and its antimicrobial properties were compared against its 2-ketopiperazine analog. The results indicate the significance of the peptide bond in antimicrobial property of cyclo(l-Pro- l-Asp) against various pathogenic bacteria and fungi with potent inhibitory effect over the 2-ketopiperazine analog. Cyclo(l-Pro- l-Asp) exhibited a higher inhibitory activity against Penicillium expansum (MIC 8 mu g/mL) than the standard fungicide amphotericin B (MIC 64 mu g/mL). The most potent activity by cyclo(l-Pro- l-Asp) was exhibited against Trichophyton rubrum (MIC 2 mu g/mL).
Diketopiperazines from Costa Rican endolichenic fungus Colpoma sp. CR1465A
作者:Seulah Lee、Giselle Tamayo-Castillo、Changhyun Pang、Jon Clardy、Shugeng Cao、Ki Hyun Kim
DOI:10.1016/j.bmcl.2016.03.115
日期:2016.5
Three newdiketopiperazines (1–3), cyclo(l-Pro-d-trans-Hyp) (1), cyclo(l-Pro-d-Glu) (2), and cyclo(d-Pro-d-Glu) (3) and five knowndiketopiperazines (4–8) were isolated from the endolichenic fungus Colpoma sp. CR1465A identified from the Costa Rican plant Henriettea tuberculosa (Melatomataceae). The structures of the new compounds 1–3 were elucidated using a combination of extensive spectroscopic analyses
三个新的二酮哌嗪(1 - 3),环(升-Pro- d -反式-Hyp)(1),环(升-Pro- d -Glu)(2),和环(d -Pro- d -Glu) (3)和5种已知的二酮哌嗪(4 - 8)从endolichenic真菌分离Colpoma藻。从哥斯达黎加植物Henriettea tuberculosa(Melatomataceae)鉴定出的CR1465A。新化合物的结构1 - 3使用广泛的光谱分析(包括2D NMR和HR-MS)进行了阐明,并通过结合NOESY分析和Marfey方法确定了它们的绝对构型。环(升-Pro- d -异基因-苏)(4)最近从中国南海海绵隔离Callyspongia。SP,但它的NMR光谱数据未报告和环(升-Pro-升-Asp)(5)以前曾报道过,但仅作为合成产品。化合物4和5的NMR数据分配是第一次报告。测试所有分离出的化合物的抗真菌和抗菌性能。
A comparative study of antimicrobial properties of cyclo(l-Pro- l-Asp) with its 2-ketopiperazine analog
作者:Chandrasekhar Challa、Nishanth Kumar、Manju John、Ravi S. Lankalapalli
DOI:10.1007/s00044-013-0836-5
日期:2014.5
Cyclo(l-Pro- l-Asp) diketopiperazine was synthesized and its antimicrobial properties were compared against its 2-ketopiperazine analog. The results indicate the significance of the peptide bond in antimicrobial property of cyclo(l-Pro- l-Asp) against various pathogenic bacteria and fungi with potent inhibitory effect over the 2-ketopiperazine analog. Cyclo(l-Pro- l-Asp) exhibited a higher inhibitory activity against Penicillium expansum (MIC 8 mu g/mL) than the standard fungicide amphotericin B (MIC 64 mu g/mL). The most potent activity by cyclo(l-Pro- l-Asp) was exhibited against Trichophyton rubrum (MIC 2 mu g/mL).