Novel gene rearrangement in the mitochondrial genome of Muraenesox cinereus and the phylogenetic relationship of Anguilliformes

Abstract

The structure and gene sequence of the fish mitochondrial genome are generally considered to be conservative. However, two types of gene arrangements are found in the mitochondrial genome of Anguilliformes. In this paper, we report a complete mitogenome of Muraenesox cinereus (Anguilliformes: Muraenesocidae) with rearrangement phenomenon. The total length of the M. cinereus mitogenome was 17,673 bp, and it contained 13 protein-coding genes, two ribosomal RNAs, 22 transfer RNA genes, and two identical control regions (CRs). The mitochondrial genome of M. cinereus was obviously rearranged compared with the mitochondria of typical vertebrates. The genes ND6 and the conjoint trnE were translocated to the location between trnT and trnP, and one of the duplicated CR was translocated to the upstream of the ND6. The tandem duplication and random loss is most suitable for explaining this mitochondrial gene rearrangement. The Anguilliformes phylogenetic tree constructed based on the whole mitochondrial genome well supports Congridae non-monophyly. These results provide a basis for the future Anguilliformes mitochondrial gene arrangement characteristics and further phylogenetic research.

The mitochondrial genome of Grapsus albolineatus (Decapoda: Brachyura: Grapsidae) and phylogenetic associations in Brachyura

“…Mitochondrial gene rearrangement is an important molecular marker and is considered to be an effective tool for studying mitochondrial evolution 26 . A large number of studies and results have shown that gene rearrangements in metazoan mitochondrial genomes are conserved 20 and the occurrence of gene rearrangements is relatively random and rare 1 , 19 , 20 , 27 . However, it can be used as direct evidence of evolutionary relationships between species 28 .…”

The First Complete Mitochondrial Genome of Eucrate crenata (Decapoda: Brachyura: Goneplacidae) and Phylogenetic Relationships within Infraorder Brachyura

“…Mitochondrial gene rearrangement is known as an effective phylogenetic signal for studying mitochondrial evolution [ 8 ]. Several studies and results have confirmed that gene rearrangements in metazoan mitochondrial genomes are conserved [ 33 ] and gene rearrangements occur relatively randomly and rarely [ 10 , 33 , 34 , 35 ]. However, it can be used as direct evidence of evolutionary relationships between species [ 36 ].…”

Novel Gene Rearrangement in the Mitochondrial Genome of Three Garra and Insights Into the Phylogenetic Relationships of Labeoninae

“…The origin of light chain replication (OL) was usually found within a WANCY group and can fold into a stem-loop ring secondary structure ( Zhang et al, 2021a ). The OL of G. dengba and G. tibetana were located between tRNA-Asn and tRNA-Cys with the same length of 34 bp, and 1 bp longer than G. yajiangensis (33 bp) ( Table 1 ).…”

“…In general, the structure of the fish mitochondrial genome is extremely conserved ( Gong et al, 2013 ). With the gradual increase in mitochondrial DNA sequence data for fish, reports of mitogenome rearrangements continue to appear ( Miya et al, 2001 ; Inoue et al, 2003 ; Zhang et al, 2021a ). To date, a few models have been employed for mitochondrial gene rearrangement.…”