DnaK3 is involved in biogenesis and/or maintenance of thylakoid membrane protein complexes in the Cyanobacterium Synechocystis sp. PCC 6803

  • DnaK3, a highly conserved cyanobacterial chaperone of the Hsp70 family, binds to cyanobacterial thylakoid membranes, and an involvement of DnaK3 in the biogenesis of thylakoid membranes has been suggested. As shown here, light triggers synthesis of DnaK3 in the cyanobacterium Synechocystis sp. PCC 6803, which links DnaK3 to the biogenesis of thylakoid membranes and to photosynthetic processes. In a DnaK3 depleted strain, the photosystem content is reduced and the photosystem II activity is impaired, whereas photosystem I is regular active. An impact of DnaK3 on the activity of other thylakoid membrane complexes involved in electron transfer is indicated. In conclusion, DnaK3 is a versatile chaperone required for biogenesis and/or maintenance of thylakoid membrane-localized protein complexes involved in electron transfer reactions. As mentioned above, Hsp70 proteins are involved in photoprotection and repair of PS II in chloroplasts.

Download full text files

Export metadata

Author:Adrien Thurotte, Tobias Seidel, Ruven Jilly, Uwe Kahmann, Dirk Schneider
Parent Title (English):Life
Place of publication:Basel
Document Type:Article
Date of Publication (online):2020/04/30
Date of first Publication:2020/04/30
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2020/10/29
Tag:Hsp70; Synechocystis sp. PCC6803; chaperone; photosynthesis; photosystem maintenance; thylakoid membrane biogenesis
Page Number:16
Institutes:Biowissenschaften / Biowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Licence (German):License LogoCreative Commons - Namensnennung 4.0