alexa Cloning And Characterization Of Pyruvate Carboxylase Gene Responsible For Calcium Malate Overproduction In Penicillium Viticola 152 And Its Expression Analysis | 71552
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
Open Access

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2nd International Conference and Expo on Water Microbiology & Novel Technologies

Ibrar Khan, Sadia Qayyum, Shehzad Ahmed, Farhana Maqbool, Isfahan Tauseef, Kashif Syed Haleem and Zhen-Ming Chi
Hazara University, Pakistan
Ocean University of China, China
Posters & Accepted Abstracts: J Microb Biochem Technol
DOI: 10.4172/1948-5948-C1-032
Abstract
In this study, a pyruvate carboxylase gene (PYC) from a marine fungus Penicillium viticola 152 isolated from marine algae was cloned and characterized by using Genome Walking method. An open reading frame (ORF) of The PYC gene (accession number: KM593097) had 3582 bp encoding 1193 amino acid protein (isoelectric point: 5.01) with a calculated molecular weight of 131.2757 kDa. A putative promoter (intronless) of the gene was located at -666 bp and contained a TATA box, several CAAT boxes, the 5'-SYGGRG-3' and a 5'-HGATAR-3' sequences. A consensus polyadenylation site (AATAAA) was also observed at +10 bp downstream of the ORF. The protein deduced from the PYC gene had no signal peptide, was a homotetramer (4), and had the four functional domains. Furthermore, PYC protein also had three potential N-linked glycosylation sites, among them, -N-S-T-I- at 36 amino acid, -N-G-T-V- at 237 amino acid, and -N-G-S-S- at 517 amino acid were the most possible N-glycosylation sites. After expression of the PYC gene of P. viticola 152 in medium supplemented with CSL and biotin, it was found that the specific pyruvate carboxylase activity in MA production medium supplemented with CSL was much higher (0.5 U/mg) than in MA medium supplemented with biotin (0.3 U/mg), suggesting that optimal concentration of CSL is required for increased expression of the PYC gene, which is responsible for high level production of malic acid in P. viticola 152 strain.
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