Chaperedoxin that combines a chaperone activity with a redox-protective function (PubMed:16563353, PubMed:18657513, PubMed:29754824). Involved in the protection against hypochlorous acid (HOCl), the active ingredient of bleach, which kills bacteria by causing protein aggregation (PubMed:29754824). Functions as an efficient holdase chaperone that protects the substrates of the major folding systems GroEL/GroES and DnaK/DnaJ/GrpE from aggregation. In addition, it prevents the irreversible oxidation of its substrates through the formation of mixed disulfide complexes (PubMed:29754824). After bleach stress, it transfers its substrates to the GroEL/GroES and DnaK/DnaJ/GrpE foldases (PubMed:29754824). Lacks oxidoreductase activity (PubMed:21498507, PubMed:29754824). The holdase activity is activated by HOCl, via the reversible chlorination of several residues in the TPR domain. Chorination probably increases the hydrophobicity of CnoX and enables it to bind a variety of substrates. Reduced glutathione (GSH) is required to resolve CnoX-substrate complexes. Interacts with a variety of proteins, including multiple ribosomal protein subunits, DnaK and GroEL (PubMed:18657513, PubMed:21498507). The reduced protein is monomeric in solution (PubMed:21498507). Upon oxidation, its oligomeric state changes to tetramers and higher oligomers (PubMed:16563353). Contains an N-terminal mobile Trx domain and four atypical tetratricopeptide repeat (TPR) motifs in the C-terminal region. The Trx domain lacks the canonical Cys-x-x-Cys active site of thioredoxins and is not a functional oxidoreductase. Mutant is highly sensitive to HOCl (PubMed:29754824). Disruption mutant displays increased sensitivity to heat stress, but not to oxidative, UV, osmotic and pH stresses. Mutation does not affect the redox state of cytoplasmic, membrane and periplasmic proteins, but mutant shows a decreased expression of several cytoplasmic proteins (PubMed:18657513). Mutant displays overinitiation, hypermutator and filamentation phenotypes with the occurrence of anucleated cells (PubMed:21195694). Extended N-terminus.