Biodegradation of phenol by Antarctic strains of Aspergillus fumigatus.
Taxonomic identification of three newly isolated Antarctic fungal strains by their 18S rDNA sequences revealed their affiliation with Aspergillus fumigatus. Phenol (0.5 g/l) as the sole carbon source was completely degraded by all strains within less than two weeks. Intracellular activities of three key enzymes involved in the phenol catabolism were determined. Activities of phenol hydroxylase (EC 1.14.13.7), hydroquinone hydroxylase (EC 1.14.13.x), and catechol 1,2-dioxygenase (EC 1.13.11.1) varied significantly between strains. The rates of phenol degradation in the three strains correlated best with the activity of catechol 1,2-dioxygenase. Six pairs of oligonucleotide primers were designed on the basis of the Aspergillus fumigatus Af293 genome sequence (NCBI Acc. No. XM_743491.1) and used to amplify phenol hydroxylase-related gene sequences. DNA sequences of about 1200 bp were amplified from all three strains and found to have a high degree of sequence identity with the corresponding gene of Aspergillus fumigatus Af293.
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Maria
M
Gerginova
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Jordan
J
Manasiev
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Husein
H
Yemendzhiev
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Anna
A
Terziyska
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Nadejda
N
Peneva
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 26, Sofia 1113, Bulgaria.
Zlatka
Z
Alexieva
D000595:Amino Acid Sequence; D000864:Antarctic Regions; D001232:Aspergillus fumigatus / Q000201:enzymology / Q000378:metabolism*; D001483:Base Sequence; D001673:Biodegradation, Environmental; D017931:DNA Primers; D006899:Mixed Function Oxygenases / Q000737:chemistry / Q000378:metabolism; D008969:Molecular Sequence Data; D019800:Phenol / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid
D017931:DNA Primers; D019800:Phenol; D006899:Mixed Function Oxygenases; C022336:phenol 2-monooxygenase