SiR-actin-labelled granules in foraminifera: patterns, dynamics, and hypotheses

Goleń, Jan; Tyszka, Jarosław; Bickmeyer, Ulf; Bijma, Jelle

doi:https://doi.org/10.5194/bg-17-995-2020

Articles | Volume 17, issue 4

https://doi.org/10.5194/bg-17-995-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-995-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 4

Research article

|

25 Feb 2020

Research article |

| 25 Feb 2020

SiR-actin-labelled granules in foraminifera: patterns, dynamics, and hypotheses

Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma

Supplement

https://doi.org/10.5194/bg-17-995-2020-supplement

Video supplement

Actin cytoskeleton in lamellipodia of living Ammonia sp. (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45179

Actin cytoskeleton and mitochondria in a newly formed chamber in Amphistegina lessonii Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45180

Actin cytoskeleton in a thick pseudopodial thread of living Amphistegina lessonii (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45181

Measurement of velocity of SiR-actin-labelled granules (ALGs) in pseudopodia of Amphistegina lessonii (Foraminifera) Jan Goleń, Jarosław Tyszka, Ulf Bickmeyer, and Jelle Bijma https://doi.org/10.5446/45182

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Short summary

We studied the organisation and dynamics of actin in foraminifera. Actin is one of the key structural proteins in most lifeforms. Our investigations show that in foraminifera it forms small granules, around 1 µm in diameter, that display rapid movement. This granularity is unusual in comparison to other organisms. We suppose that these granules are most likely involved in the formation of all types of pseudopods responsible for movement, food capturing, biomineralisation, and other functions.