A xylanase from roots of sanchi ginseng (Panax notoginseng) with inhibitory effects on human immunodeficiency virus-1 reverse transcriptase.
A xylanase with a molecular weight of 15 kDa, which is lower than those of previously reported xylanases, was isolated from the roots of the medicinal herb Panax notoginseng. The xylanase exhibits a temperature optimum of 50 degrees C and a pH optimum between 5 and 6. It inhibits HIV-1 reverse transcriptase with an IC(50) of 10 microM, but does not affect translation in a cell-free rabbit reticulocyte system when tested up to 70 microM. The enzyme is adsorbed on CM-cellulose, Affi-gel blue gel and Mono S. Previously xylanases have been isolated from seeds and not from roots, and have not been demonstrated to inhibit HIV-1 reverse transcriptase.
Lam
S K
SK
Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Ng
T B
TB
D002845:Chromatography; D054303:HIV Reverse Transcriptase / Q000037:antagonists & inhibitors* / Q000378:metabolism; D006801:Humans; D005894:Panax / Q000737:chemistry / Q000201:enzymology*; D010936:Plant Extracts / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry / Q000201:enzymology; D010946:Plants, Medicinal / Q000737:chemistry / Q000201:enzymology; D014176:Protein Biosynthesis / Q000187:drug effects; D018894:Reverse Transcriptase Inhibitors / Q000494:pharmacology*; D043325:Xylan Endo-1,3-beta-Xylosidase; D014995:Xylosidases / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism* / Q000494:pharmacology*
D010936:Plant Extracts; D018894:Reverse Transcriptase Inhibitors; D054303:HIV Reverse Transcriptase; D014995:Xylosidases; D043325:Xylan Endo-1,3-beta-Xylosidase