Abstract：
:A yeast strain isolated from feather waste from a chicken processing plant was identified as Candida parapsilosis by biochemical tests and morphological studies. The yeast was able to grow in phosphate-buffered saline supplemented with 1% native feather as the sole carbon and nitrogen source. A keratin substrate was obtained from the feathers by dimethylsulphoxide extraction. A 20-fold concentrated culture supernatant from Candida parapsilosis grown on feathers was analysed by SDS-PAGE electrophoresis containing either 1% gelatin or 1% keratin as copolymerised substrates. The presence of a single band with an approximate molecular mass of 60 kDa with gelatinolytic and keratinolytic activities was observed. This proteolytic activity was fully inhibited by phenylmethylsulphonyl fluoride. These results suggest that the extracellular enzyme belongs to the serine peptidase class. This is the first report of an extracellular serine peptidase produced by C. parapsilosis with keratinolytic activity. The role of this enzyme in yeast-host interactions is discussed.
journal_name
Mycopathologiajournal_title
Mycopathologiaauthors
Vermelho AB,Mazotto AM,de Melo AC,Vieira FH,Duarte TR,Macrae A,Nishikawa MM,da Silva Bon EPdoi
10.1007/s11046-009-9231-7subject
Has Abstractpub_date
2010-01-01 00:00:00pages
57-65issue
1eissn
0301-486Xissn
1573-0832journal_volume
169pub_type
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