Design and synthesis of amphipathic antimicrobial peptides.
Design and synthesis of amphipathic antimicrobial peptides.
复制标题
两亲性抗菌肽的设计与合成。
DOI：
10.1111/j.1399-3011.1995.tb01047.x
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Rao,AG
中科院分区：
文献类型：
--
作者：
Zhong,L;Putnam,RJ;JohnsonJr,WC;Rao,AG
A large proportion of antimicrobial peptides share a common structural feature that is critical to their antimicrobial activity, i.e. amphipathic α‐helices. The amphipathy of a polypeptide chain can be quantitated through the value of the hydrophobic moment. Generally, antimicrobial peptides are characterized by high hydrophobic moment and low hydrophobicity values. Using these criteria we have identified two short segments that possess hydrophobic moment properties associated with known antimicrobial peptides. Usingin vitroassays the segment derived from the protein perforin displays no antifungal or antibacterial activity and, while showing no α‐helicity in buffer or liposomes, exhibits a modest degree of α‐helical structure in the presence of the a‐helical inducer, 2,2,2‐trifluoroethanol. However, rational modifications result in a derivative which assumes an α‐helical conformation in the presence of liposomes, exhibits potent antifungal activity against plant fungal pathogens, has significant antibacterial activity, effects leakage of a fluorescent dye from acidic liposomes and is devoid of hemolytic activity. Results are also presented for a segment derived from the human immunodeficiency virus envelope protein. We suggest that the identification of putative amphipathic structures in proteins may provide a useful starting strategy in the design and synthesis of antimicrobial peptides.
