The cryo-EM structure of the S-layer deinoxanthin-binding complex of<i> Deinococcus</i><i> radiodurans</i> informs properties of its environmental interactions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A90127%2F22%3A00133791" target="_blank" >RIV/00216224:90127/22:00133791 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0021925822004719?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0021925822004719?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jbc.2022.102031" target="_blank" >10.1016/j.jbc.2022.102031</a>
Alternative languages
Result language
angličtina
Original language name
The cryo-EM structure of the S-layer deinoxanthin-binding complex of<i> Deinococcus</i><i> radiodurans</i> informs properties of its environmental interactions
Original language description
The radiation-resistant bacterium Deinococcus radiodurans is known as the world's toughest bacterium. The S-layer of D. radiodurans, consisting of several proteins on the surface of the cellular envelope and intimately associated with the outer membrane, has therefore been useful as a model for structural and functional studies. Its main proteinaceous unit, the S-layer deinoxanthin-binding complex (SDBC), is a hetero-oligomeric assembly known to contribute to the resistance against environmental stress and have porin functional features; however, its precise structure is unknown. Here, we resolved the structure of the SDBC at -2.5 angstrom resolution by cryo-EM and assigned the sequence of its main subunit, the protein DR_2577. This structure is characterized by a pore region, a massive beta-barrel organization, a stalk region consisting of a trimeric coiled coil, and a collar region at the base of the stalk. We show that each monomer binds three Cu ions and one Fe ion and retains one deinoxanthin molecule and two phosphoglycolipids, all exclusive to D. radiodurans. Finally, electrophysiological characterization of the SDBC shows that it exhibits transport properties with several amino acids. Taken together, these results highlight the SDBC as a robust structure displaying both protection and sieving functions that facilitates exchanges with the environment.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
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Continuities
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Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Biological Chemistry
ISSN
1083-351X
e-ISSN
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Volume of the periodical
298
Issue of the periodical within the volume
6
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
1-8
UT code for WoS article
000829588600004
EID of the result in the Scopus database
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