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Prof. Hazem Mohamed Elewa Abdelnabby :: Publications:

The role of a phospholipase (PLD) in virulence of Purpureocillium lilacinum (Paecilomyces lilacinum)
Authors: Fan Yang; Hazem Abdelnabby; Yannong Xiao
Year: 2015
Keywords: Purpureocillium lilacinum Phospholipase D (PLD) Leucinostatins A Meloidogyne incognita
Journal: Microbial Pathogenesis
Volume: 85
Issue: Not Available
Pages: 11-20
Publisher: Elsevier
Local/International: International
Paper Link:
Full paper Not Available
Supplementary materials Not Available

Phospholipases are key enzymes in pathogenic fungi that cleave host phospholipids, resulting in membrane destabilization and host cell penetration. However, understanding the role of phospholipases on the virulence of the filamentous fungus Purpureocillium lilacinum has been still rather limited. In this study, pld gene was characterized. It encodes the protein phospholipase D (PLD) in P. lilacinum. This gene, 3303 bp open reading frame fragment (ORF), encodes a protein of 1100 amino acids with high similarity to the same gene from Penicillium oxalicum and Aspergillus fumigatus. Secondary structure prediction showed two PLD phosphodiesterase domains (437e464 bp and 885e912 bp). The pld gene was significantly regulated during infection of Meloidogyne incognita eggs by P. lilacinum. The expression of pld gene using RT-PCR was the highest at 36 and 48 h, which introduce evidence that the presence of M. incognita may induce the expression of the pld gene in P. lilacinum. In addition, maltose and L-alanine were found to increase the expression of pld gene. An acidic environment (pH 3.0e4.0) and moderate temperatures (27e29 C) are favorable for pld expression in P. lilacinum.

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