Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D-alanine. D-cysteine + H2O = H(+) + hydrogen sulfide + NH4(+) + pyruvate Optimum pH is 9.0. Optimum temperature is 45 degrees Celsius. Homodimer. By sulfate starvation. Belongs to the ACC deaminase/D-cysteine desulfhydrase family.