| Autor: |
Haddad Momeni, Majid, Fredslund, Folmer, Bissaro, Bastien, Raji, Olanrewaju, Vuong, Thu V., Meier, Sebastian, Nielsen, Tine Sofie, Lombard, Vincent, Guigliarelli, Bruno, Biaso, Frédéric, Haon, Mireille, Grisel, Sacha, Henrissat, Bernard, Welner, Ditte Hededam, Master, Emma R., Berrin, Jean-Guy, Abou Hachem, Maher |
| Předmět: |
|
| Zdroj: |
Nature Communications; 4/9/2021, Vol. 12 Issue 1, p1-13, 13p |
| Abstrakt: |
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. Microbial oxidoreductases are key in biomass breakdown. Here, the authors expand the specificity and redox scope within fungal auxiliary activity 7 family (AA7) enzymes and show that AA7 oligosaccharide dehydrogenases can directly fuel cellulose degradation by lytic polysaccharide monooxygenases. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink