Journal Article

FZJ-2021-02817

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Structure-based insights into evolution of rhodopsins

Zabelskii, D.FZJ* ; Dmitrieva, N.FZJ* ; Volkov, O. ; Shevchenko, V. ; Kovalev, K. ; Balandin, T.FZJ* ; Soloviov, D. ; Astashkin, R. ; Zinovev, E. ; Alekseev, A. ; Round, E. ; Polovinkin, V. ; Chizhov, I. ; Rogachev, A. ; Okhrimenko, I. ; Borshchevskiy, V.FZJ* ; Chupin, V. ; Büldt, G. ; Yutin, N. ; Bamberg, E. ; Koonin, E. ; Gordeliy, V. (Corresponding author)FZJ*

2021
Springer Nature London

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Please use a persistent id in citations: http://hdl.handle.net/2128/27995  doi:10.1038/s42003-021-02326-4

Abstract: Rhodopsins, most of which are proton pumps generating transmembrane electrochemical proton gradients, span all three domains of life, are abundant in the biosphere, and could play a crucial role in the early evolution of life on earth. Whereas archaeal and bacterial proton pumps are among the best structurally characterized proteins, rhodopsins from unicellular eukaryotes have not been well characterized. To fill this gap in the current understanding of the proton pumps and to gain insight into the evolution of rhodopsins using a structure-based approach, we performed a structural and functional analysis of the light-driven proton pump LR (Mac) from the pathogenic fungus Leptosphaeria maculans. The first high-resolution structure of fungi rhodopsin and its functional properties reveal the striking similarity of its membrane part to archaeal but not to bacterial rhodopsins. We show that an unusually long N-terminal region stabilizes the protein through direct interaction with its extracellular loop (ECL2). We compare to our knowledge all available structures and sequences of outward light-driven proton pumps and show that eukaryotic and archaeal proton pumps, most likely, share a common ancestor.

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Contributing Institute(s):

1. Molekular- und Zellphysiologie (IBI-1)

Research Program(s):

1. 5241 - Molecular Information Processing in Cellular Systems (POF4-524) (POF4-524)

Appears in the scientific report 2021

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