Discovery of fungal oligosaccharide-oxidising flavo-enzymes with previously unknown substrates, redox-activity profiles and interplay with LPMOs

Majid Haddad Momeni, Folmer Fredslund, Bastien Bissaro, Olanrewaju Raji, Thu V. Vuong, Sebastian Meier, Tine Sofie Nielsen, Vincent Lombard, Bruno Guigliarelli, Frédéric Biaso, Mireille Haon, Sacha Grisel, Bernard Henrissat, Ditte Hededam Welner, Emma R. Master, Jean Guy Berrin*, Maher Abou Hachem*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

17 Sitaatiot (Scopus)
35 Lataukset (Pure)

Abstrakti

Oxidative plant cell-wall processing enzymes are of great importance in biology and biotechnology. Yet, our insight into the functional interplay amongst such oxidative enzymes remains limited. Here, a phylogenetic analysis of the auxiliary activity 7 family (AA7), currently harbouring oligosaccharide flavo-oxidases, reveals a striking abundance of AA7-genes in phytopathogenic fungi and Oomycetes. Expression of five fungal enzymes, including three from unexplored clades, expands the AA7-substrate range and unveils a cellooligosaccharide dehydrogenase activity, previously unknown within AA7. Sequence and structural analyses identify unique signatures distinguishing the strict dehydrogenase clade from canonical AA7 oxidases. The discovered dehydrogenase directly is able to transfer electrons to an AA9 lytic polysaccharide monooxygenase (LPMO) and fuel cellulose degradation by LPMOs without exogenous reductants. The expansion of redox-profiles and substrate range highlights the functional diversity within AA7 and sets the stage for harnessing AA7 dehydrogenases to fine-tune LPMO activity in biotechnological conversion of plant feedstocks.

AlkuperäiskieliEnglanti
Artikkeli2132
Sivumäärä13
JulkaisuNature Communications
Vuosikerta12
Numero1
DOI - pysyväislinkit
TilaJulkaistu - 9 huhtik. 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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