Two glucuronoyl esterases of Phanerochaete chrysosporium.
The white-rot fungus Phanerochaete chrysosporium produces glucuronoyl esterase, a recently discovered carbohydrate esterase, during growth on sugar beet pulp. Two putative genes encoding this enzyme, ge1 and ge2, were isolated and cloned. Heterologous expression in Aspergillus vadensis, Pycnoporus cinnabarinus and Schizophyllum commune resulted in extracellular glucuronoyl esterase activity, demonstrating that these genes encode this enzymatic function. The amino acid sequence of GE1 was used to identify homologous genes in the genomes of twenty-four fungi. Approximately half of the genomes, both from ascomycetes and basidiomycetes, contained putative orthologues, but their presence could not be assigned to any of fungal class or subclass. Comparison of the amino acid sequences of identified and putative glucuronoyl esterases to other types of carbohydrate esterases (CE) confirmed that they form a separate family of CEs. These enzymes are interesting candidates for biotechnological applications such as the separation of lignin and hemicellulose.
Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia.
Miroslava
M
Duranová
Silvia
S
Spániková
Han A B
HA
Wösten
Peter
P
Biely
Ronald P
RP
de Vries
D003001:Cloning, Molecular; D004950:Esterases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D005658:Fungi / Q000145:classification / Q000201:enzymology / Q000235:genetics; D015870:Gene Expression; D008969:Molecular Sequence Data; D020075:Phanerochaete / Q000737:chemistry / Q000201:enzymology* / Q000235:genetics; D010802:Phylogeny; D013379:Substrate Specificity
D005656:Fungal Proteins; D004950:Esterases