title: Agrocybin, an antifungal peptide from the edible mushroom Agrocybe cylindracea.
abstract: An antifungal peptide with a molecular mass of 9 kDa was isolated from fresh fruiting bodies of the mushroom Agrocybe cylindracea. The isolation procedure comprised ion exchange chromatography on DEAE-cellulose, affinity chromatography on Affi-gel blue gel, ion exchange chromatography by fast protein liquid chromatography (FPLC) on Mono S, and FPLC-gel filtration on a Superdex 75 column. The antifungal peptide, designated as agrocybin, was unadsorbed on DEAE-cellulose, and adsorbed on Affi-gel blue gel and Mono S. Agrocybin exerted antifungal activity against several fungal species but lacked inhibitory activity against bacteria when tested up to 300 microM. The activity of HIV-1 reverse transcriptase was attenuated in the presence of agrocybin. It exhibited weaker mitogenic activity than Con A on isolated murine splenocytes, but was devoid of antiproliferative activity on Hep G2 (hepatoma) cells when tested at 110 microM.
authors.affiliation: Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Patrick H K
authors.initials: PH
authors.lastname: Ngai
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhao
authors.forename: T B
authors.initials: TB
authors.lastname: Ng
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000595:Amino Acid Sequence; D000818:Animals; D019380:Anti-HIV Agents / Q000494:pharmacology; D000935:Antifungal Agents / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D002846:Chromatography, Affinity; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D003208:Concanavalin A / Q000494:pharmacology; D005656:Fungal Proteins / Q000737:chemistry; D005670:Fusarium / Q000187:drug effects; D054303:HIV Reverse Transcriptase / Q000187:drug effects; D037102:Lectins / Q000494:pharmacology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008970:Molecular Weight; D010455:Peptides / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D018894:Reverse Transcriptase Inhibitors / Q000494:pharmacology; D013154:Spleen / Q000166:cytology; D013936:Thymidine
chemical_list: D019380:Anti-HIV Agents; D000935:Antifungal Agents; D005656:Fungal Proteins; D037102:Lectins; D010455:Peptides; D010936:Plant Extracts; D018894:Reverse Transcriptase Inhibitors; C501516:agrocybin protein, Agrocybe cylindracea; D003208:Concanavalin A; D054303:HIV Reverse Transcriptase; D013936:Thymidine