Rapid screening and isolation of a fungus for sitosterol to androstenedione biotransformation.

Abstract:

:Androstenedione (AD) is a steroid intermediate used in the pharmaceutical industry for the production of several important anabolic drugs. An important route for producing AD is by the microbial transformation of sterols. Microbes capable of efficiently transforming sterols to AD are few and newer strains need to be isolated. Conventional procedures for screening and isolation are time consuming. A new procedure was used for screening and isolation of fungal microorganisms capable of biotransformation of sitosterol to androstenedione. In this procedure, Basic Alignment Search Tool (BLAST) and Position-Specific Iterative BLAST were employed to obtain a parent set of candidate microorganisms. The parent set was reduced using heuristics and constraints to obtain a manageable number of microorganisms that may be tested experimentally. For this work, screening of the entire NCBI database yielded a parent set containing 64 microorganisms. Among these, only two microorganisms, Aspergillus oryzae and Aspergillus nidulans FGSC A4, qualified to the experimental stage. Sitosterol biotransformation experiments were carried out using A. oryzae and the production of AD in culture medium was confirmed.

authors

Malaviya A,Gomes J

doi

10.1007/s12010-008-8416-8

subject

Has Abstract

pub_date

2009-08-01 00:00:00

pages

374-86

issue

2

eissn

0273-2289

issn

1559-0291

journal_volume

158

pub_type

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