Isolation, characterization and molecular cloning of a lipolytic enzyme secreted from Malassezia pachydermatis

FEMS Microbiol Lett. 2006 Mar;256(1):137-44. doi: 10.1111/j.1574-6968.2006.00106.x.

Abstract

Lipophilic Malassezia species may induce catheter-associated sepsis in premature neonates and immunocompromised patients receiving parenteral lipid emulsions. To assess the participation of lipolytic enzymes in the pathogenesis of this yeast, we cloned a gene encoding the enzyme. A lipolytic enzyme in the culture supernatant of Malassezia pachydermatis was purified 210-fold to homogeneity. The enzyme showed high esterase activity toward p-nitrophenyl octanoate. The cDNA encoding the enzyme was cloned using a degenerate oligonucleotide primer constructed from the N-terminal amino acid sequence. The cDNA consisted of 1582 bp, including an open reading frame encoding 470 amino acids. The first 19 amino acids and the following 13 amino-acid sequence were predicted to be the signal peptides for secretion and prosequence, respectively. The predicted molecular mass of the 438-amino acid mature protein was 48 kDa. Analysis of the deduced amino acid sequence revealed that it contains the consensus motif (Gly-X-Ser-X-Gly), which is conserved among lipolytic enzymes. Homology investigations showed that the enzyme has similarities principally with 11 lipases produced by Candida albicans (29-34% identity) and some other yeast lipases.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Chlorides / pharmacology
  • Cloning, Molecular / methods
  • DNA Primers / chemistry
  • DNA, Complementary / chemistry
  • DNA, Fungal / chemistry
  • Edetic Acid / pharmacology
  • Esters / metabolism
  • Humans
  • Hydrogen-Ion Concentration
  • Lipase / chemistry*
  • Lipase / classification
  • Lipase / drug effects
  • Lipase / isolation & purification*
  • Malassezia / enzymology*
  • Malassezia / genetics
  • Malassezia / pathogenicity*
  • Molecular Sequence Data
  • Mycoses / enzymology*
  • Mycoses / microbiology
  • Phylogeny
  • Physostigmine / pharmacology
  • Sequence Alignment
  • Tosyl Compounds / pharmacology
  • Virulence

Substances

  • Chlorides
  • DNA Primers
  • DNA, Complementary
  • DNA, Fungal
  • Esters
  • Tosyl Compounds
  • 4-toluenesulfonyl fluoride
  • Edetic Acid
  • Physostigmine
  • Lipase