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.
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Malaviya A,Gomes Jdoi
10.1007/s12010-008-8416-8subject
Has Abstractpub_date
2009-08-01 00:00:00pages
374-86issue
2eissn
0273-2289issn
1559-0291journal_volume
158pub_type
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