Abstract：
:A strain of Fusarium moniliforme isolated from a tropical mangrove ecosystem near Mumbai, India and deposited in the National Collection of Industrial Microorganisms (NCIM) as F. moniliforme NCIM 1276. The organism produced a single extracellular polygalacturonase (PG I) [EC 3.2.1.15] at pH 5 and a single pectate lyase (PL) [EC 4.2.2.2] at pH 8 in liquid medium containing 1% citrus pectin. Growth on semi-solid medium containing wheat bran and orange pulp resulted in a three-fold increase in PG production and a two-fold increase in PL production in comparison with that in liquid medium. The increased production of PG on semi-solid media, as compared to production in liquid media was investigated. The increased production of PG was partly due to the expression of a second polygalacturonase (PG II) isoenzyme by the fungus which was biochemically different from the one produced in liquid medium. The second PG II was a 30.6kDa enzyme, had an alkaline pI of 8.6, the Km was 0.166mg ml(-1), Vmax 13.33 micromol min(-1) mg(-1) and the kcat was 403 min(-1). It had a specific activity of 18.66U mg(-1). The differences between the PGs (PG I and PG II) suggest that the two enzymes are the products of different genes. The fungus also produced the same two PGs when it infected Lycopersicon esculentum (tomato). Only one PL was produced irrespective of growth conditions.
journal_name
Microbiol Resjournal_title
Microbiological researchauthors
Niture SK,Pant Adoi
10.1016/j.micres.2004.06.002subject
Has Abstractpub_date
2004-01-01 00:00:00pages
305-14issue
3eissn
0944-5013issn
1618-0623pii
S0944-5013(04)00054-0journal_volume
159pub_type
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