Crystallization and preliminary crystallographic data of SnoaL, a polyketide cyclase in nogalamycin biosynthesis



: Sultana A, Kallio P, Jansson A, Niemi J, Mantsala P, Schneider G

Publisher: BLACKWELL MUNKSGAARD

: 2004

 Acta Crystallographica Section D: Biological Crystallography

: ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY

: ACTA CRYSTALLOGR D

: 60

: 1118

: 1120

: 3

: 0907-4449

DOI: https://doi.org/10.1107/S090744490400705X


Nogalonic acid methyl ester cyclase (SnoaL) catalyzes the last ring-closure step in the biosynthesis of the polyketide antibiotic nogalamycin. Crystals of a complex of SnoaL with the substrate nogalonic acid methyl ester have been obtained using PEG 4000 as precipitant. The crystals are orthorhombic, space group I222, with unit-cell parameters a = 69.1, b = 72.0, c = 65.4 Angstrom. They diffract to 1.35 Angstrom resolution using synchrotron radiation. A Matthews coefficient of 2.0 Angstrom(3) Da(-1) suggests one subunit in the asymmetric unit. Diffraction data for an isomorphous uranium derivative were collected and a difference Patterson map showed strong peaks which allowed determination of the position of the uranium ions.



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