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dr Kacper Maciszewski

Scientific interests

  • Evolution of eukaryotic microorganisms
  • Evolution of plastids and mitochondria and their genomes
  • Endosymbiosis and horizontal gene transfer in eukaryotes

Research projects

Previous projects

  • Analysis of the plastid genome of the colourless strain Euglena gracilis var. bacillaris W3BUL. Grant DSM 2018, Faculty of Biology UW; budget: 10 000 PLN; August 2018 – August 2019
  • Analysis of the transcriptome of the colourless strain Euglena gracilis var. bacillaris W3BUL. Grant DSM 2019, Faculty of Biology UW; budget: 10 000 PLN; August 2019 – April 2020


  • Unraveling the plastid transport and metabolism in a secondary plastid-bearing lineage Euglenophyta. Research internship (University of Alberta, Canada) in the Iwanowska Programme, National Agency for Academic Exchange (NAWA); budget: 66 000 PLN; to be realised: September 2021 – February 2022

Societies memberships

  • International Society of Protistologists, ISOP – member since 2018

Prizes and distinctions

  • Holz-Conner Travel Grant (conference attendance; International Society of Protistologists, ISOP) – May 2019


Oral presentations

  • Maciszewski K., Han K., Graf L., Andersen R.A., Karnkowska A., Yoon H.S. Four genomes, three different structures: a study of plastid genomes of Dictyochophyceae reveals unusual variability in their organization – VIII European Congress of Protistology – ISOP joint meeting; 28 July – 2 August 2019, Rome, Italy
  • Maciszewski K., Bokus A., Karnkowska A., Dabbagh N., Preisfeld A., Bennett M.S., Triemer R.E. Missing genomes, unusual structures and other oddities: insights into the evolution of plastid genomes of Euglenophyta – 49th Jirovec’s Protozoological Days; 22-26 April 2019, Kostelec nad Cernymi Lesy, Czech Republic
  • Maciszewski K., Karnkowska A. Overview of the first two chloroplast genomes of Dictyochophyceae (Ochrophyta) – 48th Jírovec’s Protozoological Days; 30 April – 4 May 2018, Kunčice pod Ondřejníkem, Czech Republic


  • Maciszewski K., Dabbagh N., Preisfeld A., Karnkowska A. Maturyoshka: a maturase encoded within a maturase – the winding evolutionary paths of group II introns in algal plastid genomes – plakat; 12th EMBO Young Scientists Forum, 21-22 października 2021, Warszawa, Polska
  • Maciszewski K., Karnkowska A. In the spotlight, losing IR region: repeated rearrangements of plastid genome structure in euglenophytes – plakat; I Wirtualna Konferencja Naukowa Kampusu Ochota, 30 czerwca – 1 lipca 2020, Warszawa, Polska
  • Maciszewski K., Karnkowska A. Evolution of plastid genome structure and function in distant eukaryotic lineages – EMBO Young Scientists Forum 2019; 27-28 June 2019, Prague, Czech Republic
  • Maciszewski K., Karnkowska A. Evolution of the chloroplast genomes of Dictyochophyceae – an algal lineage with secondary plastids – 6th Polish Evolutionary Conference (PEC), 26-28 September 2018, Warsaw, Poland



Maciszewski, Kacper; Dabbagh, Nadja; Preisfeld, Angelika; Karnkowska, Anna

Maturyoshka: A maturase inside a maturase, and other peculiarities of the novel chloroplast genomes of marine euglenophytes Journal Article

In: Molecular Phylogenetics and Evolution, vol. 170, pp. 107441, 2022, ISSN: 1055-7903.

Abstract | Links | BibTeX


Kostygov, Alexei Y; Karnkowska, Anna; Votypka, Jan; Tashyreva, Daria; Maciszewski, Kacper; Yurchenko, Vyacheslav; Lukes, Julius

Euglenozoa : taxonomy, diversity and ecology, symbioses and viruses Journal Article

In: Open Biology, vol. 11, no. 3, pp. 200407-200407, 2021, ISBN: 0000000337.

Abstract | Links | BibTeX


Kayama, Motoki; Maciszewski, Kacper; Yabuki, Akinori; Miyashita, Hideaki; Karnkowska, Anna; Kamikawa, Ryoma

Highly reduced plastid genomes of the non-photosynthetic dictyochophyceans Pteridomonas spp. (Ochrophyta, SAR) are retained for tRNA-Glu-based organellar heme biosynthesis. Journal Article

In: Frontiers in Plant Science, vol. 11, pp. 1859 , 2020.

Links | BibTeX

Bakuła, Zofia; Gromadka, Robert; Gawor, Jan; Siedlecki, Paweł; Pomorski, Jan J.; Maciszewski, Kacper; Gromadka, Agnieszka; Karnkowska, Anna; Jagielski, Tomasz

Sequencing and Analysis of the Complete Organellar Genomes of Prototheca wickerhamii Journal Article

In: Frontiers in Plant Science, vol. 11, pp. 1296, 2020.

Links | BibTeX


Maciszewski, Kacper; Karnkowska, Anna

Should I stay or should I go? Retention and loss of components in vestigial endosymbiotic organelles Journal Article

In: Current Opinion in Genetics & Development, vol. 58-59, pp. 33-39, 2019, ISSN: 0959-437X, (Evolutionary genetics).

Abstract | Links | BibTeX

Han, Kwi Young; Maciszewski, Kacper; Graf, Louis; Yang, Ji Hyun; Andersen, Robert A; Karnkowska, Anna; Yoon, Hwan Su

Dictyochophyceae Plastid Genomes Reveal Unusual Variability in Their Organization Journal Article

In: Journal of Phycology, vol. 55, no. 5, pp. 1166-1180, 2019.

Abstract | Links | BibTeX

Jagielski, Tomasz; Bakuła, Zofia; Gawor, Jan; Maciszewski, Kacper; Kusber, Wolf-Henning; Dyląg, Mariusz; Nowakowska, Julita; Gromadka, Robert; Karnkowska, Anna

The genus Prototheca (Trebouxiophyceae, Chlorophyta) revisited: Implications from molecular taxonomic studies Journal Article

In: Algal Research, vol. 43, pp. 101639, 2019, ISSN: 2211-9264.

Abstract | Links | BibTeX


Jagielski, Tomasz; Gawor, Jan; Bakuła, Zofia; Decewicz, Przemysław; Maciszewski, Kacper; Karnkowska, Anna

cytb as a New Genetic Marker for Differentiation of Prototheca Species Journal Article

In: Journal of Clinical Microbiology, vol. 56, no. 10, 2018, ISSN: 0095-1137.

Abstract | Links | BibTeX