Chlamydia specific toxin that associates with death domains of tumor necrosis factor family (TNF) receptors and induces apoptosis in mammalian cell lines through a Caspase-dependent mechanism (PubMed:11805081, PubMed:15087448). Probably functions as an oxidoreductase (PubMed:15087448). Binds 2 Fe(2+) ions per subunit. Homodimer. Secreted into the host cytoplasm, where it co-localizes with Fas in the proximity of the inclusion body. Expressed late in the infectious cycle. Belongs to the CADD family.