Purification, partial amino acid sequence and structure of the product of raucaffricine-O-β-d-glucosidase from plant cell cultures of Rauwolfia serpentina
作者:Heribert Warzecha、Peter Obitz、Joachim Stöckigt
DOI:10.1016/s0031-9422(98)00689-x
日期:1999.4
glycosylated. Structural investigation of the enzyme product, vomilenine, demonstrated that the alkaloid exists in aqueous solutions in an equilibrium of 21(R)- and 21(S)-vomilenine in a ratio of 3.4:1. Proteolysis of the pure enzyme with endoproteinase Lys C revealed six peptide fragments with 6-24 amino acids which were sequenced. The two largest fragments showed sequences, of which the motif Val-Thr-Glu-Asn-Gly
BETA-GLUCOSIDASE AND A PROCESS FOR EXTRACTION THEREOF
申请人:Sangwan Neelam Singh
公开号:US20070212745A1
公开(公告)日:2007-09-13
The present invention provides a novel beta glucosidase and a process for extraction of a beta-glucosidase from
Rauvolfia serpentine
useful for the cleaving of beta-1,4 linkage of PNPG and to convert other gluco-conjugates such as strictosidine and raucaffricine into their corresponding aglycon such as vomilenine, commercially through immobilizing the enzyme. The β glucosidase enzyme has shown maximum activity in the acid pH range, with high optimum temperature using PNPG as substrate. The crude enzyme, when stored at 4° C., was quite stable for 6 days with 50% loss of activity. The enzyme was activated in presence of FeSO
4
in the assay mixture.