DNA-binding and protein structure of nuclear factors likely acting in genetic information processing in the Paulinella chromatophore
- Macorano, Luis
- Binny, Taniya M.
- Gertzen, Christoph G. W.
- Höppner, Astrid
- Smits, Sander H. J.
- Nowack, Eva C. M.
- Spiegl, Tobias
- Klimenko, Victoria
- Singer, Anna
- Oberleitner, Linda
- Applegate, Violetta
- Seyffert, Sarah
- Stefanski, Anja
- Gremer, Lothar
DOIAbstract
The chromatophores in Paulinella are evolutionary-early-stage photosynthetic organelles. Biological processes in chromatophores depend on a combination of chromatophore and nucleus-encoded proteins. Interestingly, besides proteins carrying chromatophore-targeting signals, a large arsenal of short chromatophore-targeted proteins (sCTPs; <90 amino acids) without recognizable targeting signals were found in chromatophores. This situation resembles endosymbionts in plants and insects that are manipulated by host-derived antimicrobial peptides. Previously, we identified an expanded family of sCTPs of unknown function, named here "DNA-binding (DB)-sCTPs". DB-sCTPs contain a ~45 amino acid motif that is conserved in some bacterial proteins with pr...
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