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| Main Authors: | , , , , , , , , , |
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| Format: | Artículo Open Access |
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Wiley
2025
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| Online Access: | https://onlinelibrary.wiley.com/doi/10.1002/pro.70421 |
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| _version_ | 1867009392405118976 |
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| author | Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras |
| author_facet | Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras |
| collection | Wiley Open Access |
| contents | Structural and functional specialization of Bordetella pertussis DsbA for pertussis toxin folding Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras Protein Science Abstract Disulphide bonds (Dsbs) are essential for the folding, stability, and function of many secreted and membrane‐associated proteins in bacteria. In Gram‐negative species, these bonds are introduced by the Dsb enzyme family, with DsbA acting as the primary thiol oxidase. While DsbA proteins share a conserved thioredoxin (TRX)‐like fold, emerging evidence highlights substantial structural and functional divergence among pathogenic homologues. Here, we present the high‐resolution crystal structure and functional characterization of BperDsbA, a DsbA homologue from Bordetella pertussis , the causative agent of whooping cough. BperDsbA adopts a canonical TRX fold with a CPHC active site and a threonine‐containing cis‐proline loop, but displays striking deviations from prototypical DsbAs. Notably, it contains a highly destabilizing catalytic Dsb, resulting in one of the most oxidizing redox potentials recorded for a DsbA enzyme. Surface electrostatic analysis reveals an unusual distribution of positive and negative charge around the active site, in contrast to the broadly hydrophobic catalytic surfaces of other DsbAs. Functionally, BperDsbA shows limited substrate promiscuity and selectively catalyzes the oxidative folding of a pertussis toxin‐derived peptide, supporting a model of substrate specialization. Together, these findings suggest that BperDsbA has evolved unique redox and structural features to support virulence factor maturation in B. pertussis . This work expands our understanding of the mechanistic diversity of DsbA enzymes and highlights their potential as pathogen‐specific targets for anti‐virulence therapeutics. 10.1002/pro.70421 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/pro.70421 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_pro_70421 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2025 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Structural and functional specialization of Bordetella pertussis DsbA for pertussis toxin folding Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras Protein Science Structural and functional specialization of Bordetella pertussis DsbA for pertussis toxin folding Stephanie Penning Lachlan Mitchell Yaoqin Hong Taylor Cunliffe Pramod Subedi Geqing Wang Lilian Hor Makrina Totsika Jason J. Paxman Begoña Heras Protein Science Abstract Disulphide bonds (Dsbs) are essential for the folding, stability, and function of many secreted and membrane‐associated proteins in bacteria. In Gram‐negative species, these bonds are introduced by the Dsb enzyme family, with DsbA acting as the primary thiol oxidase. While DsbA proteins share a conserved thioredoxin (TRX)‐like fold, emerging evidence highlights substantial structural and functional divergence among pathogenic homologues. Here, we present the high‐resolution crystal structure and functional characterization of BperDsbA, a DsbA homologue from Bordetella pertussis , the causative agent of whooping cough. BperDsbA adopts a canonical TRX fold with a CPHC active site and a threonine‐containing cis‐proline loop, but displays striking deviations from prototypical DsbAs. Notably, it contains a highly destabilizing catalytic Dsb, resulting in one of the most oxidizing redox potentials recorded for a DsbA enzyme. Surface electrostatic analysis reveals an unusual distribution of positive and negative charge around the active site, in contrast to the broadly hydrophobic catalytic surfaces of other DsbAs. Functionally, BperDsbA shows limited substrate promiscuity and selectively catalyzes the oxidative folding of a pertussis toxin‐derived peptide, supporting a model of substrate specialization. Together, these findings suggest that BperDsbA has evolved unique redox and structural features to support virulence factor maturation in B. pertussis . This work expands our understanding of the mechanistic diversity of DsbA enzymes and highlights their potential as pathogen‐specific targets for anti‐virulence therapeutics. 10.1002/pro.70421 http://creativecommons.org/licenses/by/4.0/ |
| title | Structural and functional specialization of Bordetella pertussis DsbA for pertussis toxin folding |
| topic | Protein Science |
| url | https://onlinelibrary.wiley.com/doi/10.1002/pro.70421 |