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Parachlorella kessleri strain:NIES-2152

ABSTRACT: Draft genome sequencing of Parachlorella kessleri and mutation analysis

PROVIDER: PRJDB20539 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR658186_1.fastq.gz	Fastqsanger.gz
	DRR658186_2.fastq.gz	Fastqsanger.gz
	DRR658187_1.fastq.gz	Fastqsanger.gz
	DRR658187_2.fastq.gz	Fastqsanger.gz
	DRR658188_1.fastq.gz	Fastqsanger.gz

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Parachlorella kessleri strain:NIES-2152

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Development of a CRISPR/Cas9-mediated gene-editing method to isolate a mutant of the unicellular green alga Parachlorella kessleri strain NIES-2152 with improved lipid productivity.

Project description:BackgroundPreviously, we isolated a mutant of Parachlorella kessleri named strain PK4 that accumulated higher concentrations of lipids than the wild-type strain. Resequencing of the PK4 genome identified mutations in three genes which may be associated with the high-lipid phenotype. The first gene, named CDMT1, encodes a protein with a calcium-dependent membrane association domain; the second gene, named DMAN1, encodes endo-1,4-β-mannanase, while the third gene, named AATPL1, encodes a plastidic ATP/ADP antiporter-like protein.ResultsTo determine which of these mutant genes are directly responsible for the phenotype of strain PK4, we delivered Cas9-gRNA ribonucleoproteins targeting each of the three genes into the wild-type cells by electroporation and successfully disrupted these three genes separately. The lipid productivity in the disruptants of CDMT1 and DMAN1 was similar to and lower than that in the wild-type strain, while the disruptants of AATPL1 exhibited > 30% higher lipid productivity than the wild-type strain under diurnal conditions.ConclusionsWe succeeded in improving the lipid productivity of P. kessleri by CRISPR/Cas9-mediated gene disruption of AATPL1. The effective gene-editing method established in this study will be useful to improve Parachlorella strains for industrial applications.

| S-EPMC10916037 | biostudies-literature

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