Crystallization of a fungal lytic polysaccharide monooxygenase expressed from glycoengineered Pichia pastoris for X‐ray and neutron diffraction
Lytic polysaccharide monooxygenases (LPMOs) are carbohydrate‐disrupting enzymes secreted by bacteria and fungi that break glycosidic bonds via an oxidative mechanism. Fungal LPMOs typically act on cellulose and can enhance the efficiency of cellulose‐hydrolyzing enzymes that release soluble sugars f...
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Veröffentlicht in: | Acta crystallographica. Section F, Structural biology communications Structural biology communications, 2017-02, Vol.73 (2), p.70-78 |
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Sprache: | eng |
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Zusammenfassung: | Lytic polysaccharide monooxygenases (LPMOs) are carbohydrate‐disrupting enzymes secreted by bacteria and fungi that break glycosidic bonds via an oxidative mechanism. Fungal LPMOs typically act on cellulose and can enhance the efficiency of cellulose‐hydrolyzing enzymes that release soluble sugars for bioethanol production or other industrial uses. The enzyme PMO‐2 from Neurospora crassa (NcPMO‐2) was heterologously expressed in Pichia pastoris to facilitate crystallographic studies of the fungal LPMO mechanism. Diffraction resolution and crystal morphology were improved by expressing NcPMO‐2 from a glycoengineered strain of P. pastoris and by the use of crystal seeding methods, respectively. These improvements resulted in high‐resolution (1.20 Å) X‐ray diffraction data collection at 100 K and the production of a large NcPMO‐2 crystal suitable for room‐temperature neutron diffraction data collection to 2.12 Å resolution.
Polysaccharide monooxygenase 2 from N. crassa was expressed from a glycoengineered strain of P. pastoris. Crystals of the protein bearing modified N‐linked glycans showed improved X‐ray diffraction at 100 K (1.20 Å resolution) and permitted room‐temperature neutron diffraction data collection to 2.12 Å resolution. |
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ISSN: | 2053-230X 2053-230X |
DOI: | 10.1107/S2053230X16020318 |