Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. D-cysteine + H2O = H(+) + hydrogen sulfide + NH4(+) + pyruvate Homodimer. Belongs to the ACC deaminase/D-cysteine desulfhydrase family. Produces two separate ORFs. Produces two separate ORFs.