Sulfhydryl oxidases: Sources, properties, production and applications

Research output: Contribution to journalReview Article


Research units

  • VTT Technical Research Centre of Finland


The formation of disulfide bonds in proteins and small molecules can greatly affect their functionality. Sulfhydryl oxidases (SOXs) are enzymes capable of oxidising the free sulfhydryl groups in proteins and thiol-containing small molecules by using molecular oxygen as an electron acceptor. SOXs have been isolated from the intracellular compartments of many organisms, but also secreted SOXs are known. These latter enzymes are generally active on small compounds and their physiological role is unknown, whereas the intracellular enzymes prefer proteins as substrates and are involved in protein folding. An increasing number of scientific publications and patent applications on SOXs have been published in recent years. The present mini-review provides an up-to-date summary of SOXs from various families, their production and their actual or suggested applications. The sequence features and domain organisation of the characterised SOXs are reviewed, and special attention is paid to the physicochemical features of the enzymes. A review of patents and patent applications regarding this class of enzymes is also provided.


Original languageEnglish
Pages (from-to)957-966
Number of pages10
JournalApplied Microbiology and Biotechnology
Issue number4
Publication statusPublished - 1 Aug 2011
MoE publication typeA2 Review article in a scientific journal

    Research areas

  • Application, Disulfide bond, Glutathione, Sulfhydryl oxidase, Sulphydryl oxidase, Thiol oxidase

ID: 32962156