Catalyzes the conversion of carbon disulfide into hydrogen sulfide and carbon dioxide, with carbonyl sulfide as an intermediate. Likely plays a key role in sulfur metabolism that allows Acidianus sp. A1-3 to grow on carbon disulfide as the main carbon and energy source. Does not show carbonic anhydrase activity (hydration of CO(2) to carbonate). carbon disulfide + 2 H2O = CO2 + 2 H(+) + 2 hydrogen sulfide Binds 1 zinc ion per subunit. kcat is 952 sec(-1) with carbon disulfide as substrate. kcat is 1800 sec(-1) with the intermediate carbonyl sulfide as substrate. Sulfur metabolism; hydrogen sulfide biosynthesis. Forms a hexadecameric catenane homooligomer, through interactions of two interlocked octameric rings. Exists as both octamers and hexadecamers in solution. Monomeric form obtained under denaturing conditions. Octameric ring form. Hexadecameric catenane form. Belongs to the beta-class carbonic anhydrase family.