000874981 001__ 874981 000874981 005__ 20220930130235.0 000874981 0247_ $$2doi$$a10.1038/s41467-020-16032-y 000874981 0247_ $$2Handle$$a2128/25096 000874981 0247_ $$2altmetric$$aaltmetric:80986960 000874981 0247_ $$2pmid$$apmid:32358514 000874981 0247_ $$2WOS$$aWOS:000531425700018 000874981 037__ $$aFZJ-2020-01746 000874981 082__ $$a500 000874981 1001_ $$0P:(DE-Juel1)169220$$aKovalev, Kirill$$b0 000874981 245__ $$aMolecular mechanism of light-driven sodium pumping 000874981 260__ $$a[London]$$bNature Publishing Group UK$$c2020 000874981 3367_ $$2DRIVER$$aarticle 000874981 3367_ $$2DataCite$$aOutput Types/Journal article 000874981 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1592485877_23512 000874981 3367_ $$2BibTeX$$aARTICLE 000874981 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000874981 3367_ $$00$$2EndNote$$aJournal Article 000874981 520__ $$aThe light-driven sodium-pumping rhodopsin KR2 from Krokinobacter eikastus is the only non-proton cation active transporter with demonstrated potential for optogenetics. However, the existing structural data on KR2 correspond exclusively to its ground state, and show no sodium inside the protein, which hampers the understanding of sodium-pumping mechanism. Here we present crystal structure of the O-intermediate of the physiologically relevant pentameric form of KR2 at the resolution of 2.1 Å, revealing a sodium ion near the retinal Schiff base, coordinated by N112 and D116 of the characteristic NDQ triad. We also obtained crystal structures of D116N and H30A variants, conducted metadynamics simulations and measured pumping activities of putative pathway mutants to demonstrate that sodium release likely proceeds alongside Q78 towards the structural sodium ion bound between KR2 protomers. Our findings highlight the importance of pentameric assembly for sodium pump function, and may be used for rational engineering of enhanced optogenetic tools. 000874981 536__ $$0G:(DE-HGF)POF3-551$$a551 - Functional Macromolecules and Complexes (POF3-551)$$cPOF3-551$$fPOF III$$x0 000874981 588__ $$aDataset connected to CrossRef 000874981 7001_ $$0P:(DE-HGF)0$$aAstashkin, Roman$$b1 000874981 7001_ $$0P:(DE-HGF)0$$aGushchin, Ivan$$b2 000874981 7001_ $$00000-0003-4078-4762$$aOrekhov, Philipp$$b3 000874981 7001_ $$0P:(DE-Juel1)176195$$aVolkov, Dmytro$$b4 000874981 7001_ $$0P:(DE-Juel1)174058$$aZinovev, Egor$$b5 000874981 7001_ $$00000-0003-2369-1732$$aMarin, Egor$$b6 000874981 7001_ $$0P:(DE-HGF)0$$aRulev, Maksim$$b7 000874981 7001_ $$0P:(DE-Juel1)169221$$aAlekseev, Alexey$$b8 000874981 7001_ $$0P:(DE-HGF)0$$aRoyant, Antoine$$b9 000874981 7001_ $$0P:(DE-HGF)0$$aCarpentier, Philippe$$b10 000874981 7001_ $$0P:(DE-Juel1)176102$$aVaganova, Svetlana$$b11 000874981 7001_ $$0P:(DE-Juel1)176570$$aZabelskii, Dmitrii$$b12 000874981 7001_ $$0P:(DE-Juel1)131948$$aBaeken, Christian$$b13 000874981 7001_ $$0P:(DE-Juel1)136714$$aSergeev, Ilya$$b14 000874981 7001_ $$0P:(DE-Juel1)131949$$aBalandin, Taras$$b15 000874981 7001_ $$0P:(DE-HGF)0$$aBourenkov, Gleb$$b16 000874981 7001_ $$00000-0002-8646-0440$$aCarpena, Xavier$$b17 000874981 7001_ $$00000-0001-5949-6627$$aBoer, Roeland$$b18 000874981 7001_ $$00000-0002-9216-4525$$aMaliar, Nina$$b19 000874981 7001_ $$0P:(DE-Juel1)179072$$aBorshchevskiy, Valentin$$b20 000874981 7001_ $$0P:(DE-Juel1)131957$$aBüldt, Georg$$b21 000874981 7001_ $$0P:(DE-HGF)0$$aBamberg, Ernst$$b22 000874981 7001_ $$0P:(DE-Juel1)131964$$aGordeliy, Valentin$$b23$$eCorresponding author 000874981 773__ $$0PERI:(DE-600)2553671-0$$a10.1038/s41467-020-16032-y$$gVol. 11, no. 1, p. 2137$$n1$$p2137$$tNature Communications$$v11$$x2041-1723$$y2020 000874981 8564_ $$uhttps://juser.fz-juelich.de/record/874981/files/Invoice_2676181679.pdf 000874981 8564_ $$uhttps://juser.fz-juelich.de/record/874981/files/Invoice_2676181679.pdf?subformat=pdfa$$xpdfa 000874981 8564_ $$uhttps://juser.fz-juelich.de/record/874981/files/s41467-020-16032-y.pdf$$yOpenAccess 000874981 8564_ $$uhttps://juser.fz-juelich.de/record/874981/files/s41467-020-16032-y.pdf?subformat=pdfa$$xpdfa$$yOpenAccess 000874981 8767_ $$82676181679$$92020-04-09$$d2020-04-15$$eAPC$$jZahlung erfolgt$$pNCOMMS-20-04285B$$zBelegnr. 1200152119 000874981 909CO $$ooai:juser.fz-juelich.de:874981$$popenCost$$pVDB$$pdriver$$pOpenAPC$$popen_access$$popenaire$$pdnbdelivery 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)169220$$aForschungszentrum Jülich$$b0$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176195$$aForschungszentrum Jülich$$b4$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)174058$$aForschungszentrum Jülich$$b5$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176102$$aForschungszentrum Jülich$$b11$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176570$$aForschungszentrum Jülich$$b12$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)131948$$aForschungszentrum Jülich$$b13$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)131949$$aForschungszentrum Jülich$$b15$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)179072$$aForschungszentrum Jülich$$b20$$kFZJ 000874981 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)131964$$aForschungszentrum Jülich$$b23$$kFZJ 000874981 9131_ $$0G:(DE-HGF)POF3-551$$1G:(DE-HGF)POF3-550$$2G:(DE-HGF)POF3-500$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bKey Technologies$$lBioSoft – Fundamentals for future Technologies in the fields of Soft Matter and Life Sciences$$vFunctional Macromolecules and Complexes$$x0 000874981 9141_ $$y2020 000874981 915__ $$0StatID:(DE-HGF)0200$$2StatID$$aDBCoverage$$bSCOPUS 000874981 915__ $$0StatID:(DE-HGF)1030$$2StatID$$aDBCoverage$$bCurrent Contents - 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