Complete mitochondrial genome of the marine polychaete, Marphysa sanguinea (Polychaeta, Eunicida)

Abstract

The complete mitochondrial genome of Marphysa sanguinea from northern China was determined. This entire sequence was 15,159 bp in length, containing 13 protein-coding genes (PCGs), 2 rRNA genes, 22 tRNA genes and a putative control region (D-loop). The base composition of the genome was 30.7% A, 30.3% T, 26.5% C and 12.6% G. Some PCGs shared nucleotides with neighboring genes, and all 13 PCGs had ATG as a start codon. Two complete stop codons (TAA, TAG) were used by the PCGs. Compared to other marine polychaetes and oligophaetes, most of the PCGS were without any rearrangement, except for ND2 and ND3, in which the order was reversed.

Guess who? On the importance of using appropriate name: case study of Marphysa sanguinea (Montagu, 1813)

“…Finally, a comparison of sequences of COI of a specimen from the type locality (AM W.51410) with specimen used to sequence the complete mitochondrial genome of M.sanguinea (accession number: KF733802, specimen from China) (Li et al 2016) was performed. Unsurprisingly, these sequences were very different; the interspecific pairwise genetic distance was 18.5%.…”

Syllidae mitochondrial gene order is unusually variable for Annelida

“…Occasionally, some genes of Streptosyllis sp., T. antoni and Typosyllis sp. end in TA or simply T. These variations from the typical stop and start codons have been also found in R. multicaudata and T. cryptica (Aguado et al 2015a), and incomplete stop codons are also present in other annelids (Bleidorn et al 2006;Li et al 2016). Interestingly, alternative start and stop codons only appear in those syllids with highly rearranged genomes (i.e.…”

“…In R. multicaudata and T. cryptica, the AT skews are positive, while GC skews negative (Aguado et al 2015a). In most studied annelids, the GC skew is usually more negative than the AT skew (Bleidorn et al 2006;Zhong et al 2008;Richter et al 2015;Li et al 2016;Patra et al 2016). …”

Checklist of polychaetes (Annelida: Polychaeta) from a sandstone reef of Southeastern Brazil

“…The second most abundant species, Marphysa sanguinea, is a common eunicid, globally distributed on consolidated and unconsolidated substrates of different marine environments, especially in sheltered places (Li et al, 2014). Species of Eunicidae are commercially used in aquaculture as food for fishes and shrimps (Fidalgo e Costa et al, 2016) and as bait in recreational fishing (Zanol et al, 2016).…”