Home • Hondaea fermentalgiana CCAP_4062/3
Hondaea fermentalgiana
Light (A) and epifluorescence (B) micrograph of Hondaea fermentalgiana. A) Bright field and B) nile red staining. Picture Credit: Olivier Cagnac, Fermentalg licenced under CC BY-NC-ND 4.0.

The Hondaea fermentalgiana genome sequence and gene models have not been determined by the JGI, but were downloaded from GenBank on April 26, 2021. Please note that this copy of the genome is not maintained by GenBank and is therefore not automatically updated. In order to allow comparative analyses with other algal genomes sequenced by the JGI, a copy of this genome is incorporated into PhycoCosm. The JGI Annotation Pipeline was used to add functional annotation to this genome.

Hondaea fermentalgiana CCAP_4062/3

The stramenopile Hondaea fermentalgiana was described in 2018 (Dellero et al., 2018) by Olivier Cagnac (ocagnac@fermentalg.com, Fermentalg) and Alberto Amato (alberto.amato@cea.fr, LPCV-IRIG CEA Grenoble), from a monoclonal culture isolated from mangrove litter on the coasts of Mayotte (Indian Ocean). The culture was first identified as Aurantiochytrium limacinum, but physiological as well as lipidomics analyses showed slight differences and prompted a more thorough investigation. The complete genome was thus sequenced using Illumina and PacBio sequence platforms (Seddiki et al., 2018).

The strain was isolated in the framework of a collaborative consortium - Trans’Alg – which was led by the company Fermentalg based in France near Bordeaux. The aim of the consortium was to isolate and improve growth and culture conditions of oleaginous thraustochytrids (such as Schizochytrium aggregatum or A. limacinum) to be used for industrial production.
The genus Hondaea is cryptic to the genus Aurantiochytrium, but lipidomically speaking the two genera can be easily distinguished.

Like other thraustochytrids, the life cycle of Hondaea fermentalgiana is rather complex with mono- and multi-nucleated cells and with a sessile and a mobile life stage. The latter is called a zoospore and possesses two unequal flagella used to explore the surrounding space and colonise new fallen mangrove leaves (Morabito et al., 2019).

Within the newly described genus, at least one other species exists (Dellero et al., 2018), but to date no formal description has been published. This makes the present genome the only Hondaea genome publicly available.

Bibliography cited:

Dellero, Y., Cagnac, O., Rose, S., Seddiki, K., Cussac, M., Morabito, C., Lupette, J., Aiese Cigliano, R., Sanseverino, W., Kuntz, M., Jouhet, J., Maréchal, E., Rébeillé, F., & Amato, A. (2018). Proposal of a new thraustochytrid genus Hondaea gen. nov. and comparison of its lipid dynamics with the closely related pseudo-cryptic genus Aurantiochytrium. Algal Research, 35, 125–141. https://doi.org/10.1016/j.algal.2018.08.018

Morabito, C., Bournaud, C., Maës, C., Schuler, M., Aiese Cigliano, R., Dellero, Y., Maréchal, E., Amato, A., & Rébeillé, F. (2019). The lipid metabolism in thraustochytrids. Progress in Lipid Research, 76, 101007. https://doi.org/10.1016/j.plipres.2019.101007

Seddiki, K., Godart, F., Aiese Cigliano, R., Sanseverino, W., Barakat, M., Ortet, P., Rébeillé, F., Maréchal, E., Cagnac, O., & Amato, A. (2018). Sequencing, de novo assembly, and annotation of the complete genome of a new thraustochytrid species, strain CCAP_4062/3. Genome Announcements, 6(11), e01335-17. https://doi.org/10.1128/genomeA.01335-17

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