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  • Title: Interchangeable modules in bacterial thiol-disulfide exchange pathways.
    Author: Kouwen TR, van Dijl JM.
    Journal: Trends Microbiol; 2009 Jan; 17(1):6-12. PubMed ID: 19059781.
    Abstract:
    Thiol-disulfide oxidoreductases (TDORs) catalyze thiol-disulfide exchange reactions that are crucial for protein activity and stability. Specifically, they can function as thiol oxidases, disulfide reductases or disulfide isomerases. The generally established view is that particular TDORs act unidirectionally within a fixed cascade of specific, sequentially arranged reactions. However, recent studies on both Gram-negative and Gram-positive bacteria imply that this view needs to be expanded, at least for thiol-disulfide exchanges in proteins that are exported from the cytoplasm. Here, we present our opinion that various TDORs can function as interchangeable modules in different thiol-disulfide exchange pathways. Such TDOR modules, thus, fulfil important functions in generating the diversity in activity and specificity that is needed in productive extracytoplasmic thiol-disulfide exchange.
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