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Background  With the growing demand for fossil fuels and the severe energy crisis, lignocellulose is widely regarded as a promising cost-effective renewable resource for ethanol production, and the use of lignocellulose residues as raw material is remarkable. Polar organisms have important value in scientific research and development for their novelty, uniqueness and diversity.    Results  In this study, a fungus  Aspergillus sydowii  MS-19, with the potential for lignocellulose degradation was screened out and isolated from an Antarctic region. The growth profile of  Aspergillus sydowii  MS-19 was measured, revealing that  Aspergillus sydowii  MS-19 could utilize lignin as a sole carbon source. Its ability to synthesize low-temperature lignin peroxidase (Lip) and manganese peroxidase (Mnp) enzymes was verified, and the properties of these enzymes were also investigated. High-throughput sequencing was employed to identify and characterize the transcriptome of  Aspergillus sydowii  MS-19. Carbohydrate-Active Enzymes (CAZyme)-annotated genes in  Aspergillus sydowii  MS-19 were compared with those in the brown-rot fungus representative species,  Postia placenta  and  Penicillium decumbens . There were 701CAZymes annotated in  Aspergillus sydowii  MS-19, including 17 cellulases and 19 feruloyl esterases related to lignocellulose-degradation. Remarkably, one sequence annotated as laccase was obtained, which can degrade lignin. Three peroxidase sequences sharing a similar structure with typical lignin peroxidase and manganese peroxidase were also found and annotated as haem-binding peroxidase, glutathione peroxidase and catalase-peroxidase.    Conclusions  In this study, the fungus  Aspergillus sydowii  MS-19 was isolated and shown to synthesize low-temperature lignin-degrading enzymes: lignin peroxidase (Lip) and manganese peroxidase (Mnp). These findings provide useful information to improve our understanding of low-temperature lignocellulosic enzyme production by polar microorganisms and to facilitate research and applications of the novel Antarctic  Aspergillus sydowii  strain MS-19 as a potential lignocellulosic enzyme source.    Electronic supplementary material  The online version of this article (doi:10.1186/s12866-017-1028-0) contains supplementary material, which is available to authorized users.

bmc microbiology

Isolation, characterization and transcriptome analysis of a novel Antarctic Aspergillus sydowii strain MS-19 as a potential lignocellulosic enzyme source