Function
Catalyzes the desulfonation and deamination of L-cysteate, yielding pyruvate, sulphite and ammonium. Is involved in a L-cysteate degradation pathway that allows Silicibacter pomeroyi to grow on L-cysteate as the sole source of carbon and energy. To a lesser extent, can also act on D-cysteine in vitro, leading to the production of pyruvate, sulfide and ammonium. L-cysteine, L-cysteine sulfinate, and 1-aminocyclopropane-1-carboxylate (ACC) are not substrates for the enzyme.
Sequence
MHLARYPRRFIAHLPTPLERLDRLTAELGGPEIWIKRDDCTGLSTGGNKTRKLEFLMAEAELQGADMVMTQGATQSNHARQTAAFAAKLGMDCHILLEDRTGSNNANYNNNGNVLLDHLHGATTEKRPGSGLDMNAEMEKVAEKFRADGRKVYTIPGGGSNPTGALGYVNCAFEMLNQFNERGLKVDHIVHATGSAGTQAGLITGLQAMNAQIPLLGIGVRAPKPKQEENVYNLACATAEKLGCPGVVAREDVVANTDYVGEGYGIPTESGLEAIRMFAELEAILLDPVYSAKGAAGFIDLIRKGHFKKGERVVFLHTGGAVALFGYDNAFDYSGRWVA