Abstract
Key message
We reported the mitochondrial genome of Ventilago leiocarpa for the first time. Two and one sites lead to the generation of stop and stat codon through editing were verified.
Abstract
Ventilago leiocarpa, a member of the Rhamnaceae family, is frequently utilized in traditional medicine due to the medicinal properties of its roots. In this study, we successfully assembled the mitogenome of V. leiocarpa using both BGI short reads and Nanopore long reads. This mitogenome has a total length of 331,839 bp. The annotated results showed 36 unique protein-coding, 16 tRNA and 3 rRNA genes in this mitogenome. Furthermore, we confirmed the presence of a branched structure through the utilization of long reads mapping, PCR amplification, and Sanger sequencing. Specifically, the ctg1 can form a single circular molecule or combine with ctg4 to form a linear molecule. Likewise, ctg2 can form a single circular molecule or can be connected to ctg4 to form a linear molecule. Subsequently, through a comparative analysis of the mitogenome and cpgenome sequences, we identified ten mitochondrial plastid sequences (MTPTs), including two complete protein-coding genes and five complete tRNA genes. The existence of MTPTs was verified by long reads. Colinear analysis showed that the mitogenomes of Rosales were highly divergent in structure. Finally, we identified 545 RNA editing sites involving 36 protein-coding genes by Deepred-mt. To validate our findings, we conducted PCR amplification and Sanger sequencing, which confirmed the generation of stop codons in atp9-223 and rps10-391, as well as the generation of a start codon in nad4L-2. This project reported the complex structure and RNA editing event of the V. Leiocarpa mitogenome, which will provide valuable information for the study of mitochondrial gene expression.
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Data availability
The mitochondrial genome have been deposited in NCBI with accession number: OQ165322, OQ165323 and OQ165324 with the links (https://www.ncbi.nlm.nih.gov/nuccore/OQ165322), (https://www.ncbi.nlm.nih.gov/nuccore/OQ165323) and (https://www.ncbi.nlm.nih.gov/nuccore/OQ165324). The chloroplast genome have been deposited in NCBI with accession number: OR750851 with the links (https://www.ncbi.nlm.nih.gov/nuccore/OR750851). The raw sequencing data have been deposited in NCBI with accession number: SRR22922730, SRR22922731. All data generated by this study are available at the corresponding author upon reasonable request.
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This work was supported by Young and Middle-aged Teachers of Universities in Guangxi (No. 2021KY0862), Funding for Key Lab. for Zhuang and Yao pharmaceutical quality biology, Guangxi Science & Technology Normal University (No. GXKSKYPT2021007), Guangxi science and technology program (2021AC19423).
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YMQ designed the project. SG assembled the mitogenome, analyzed data and wrote the manuscript. ZYL conducted the phylogenetic analysis. YL, CLL and XLL reviewed the manuscript. All authors read and approved the manuscript.
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Guo, S., Li, Z., Li, C. et al. Assembly and characterization of the complete mitochondrial genome of Ventilago leiocarpa. Plant Cell Rep 43, 77 (2024). https://doi.org/10.1007/s00299-023-03126-2
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DOI: https://doi.org/10.1007/s00299-023-03126-2