The partial mitochondrial genome of the Cephalothrix rufifrons (Nemertea, Palaeonemertea): characterization and implications for the phylogenetic position of Nemertea.

Abstract:

:A continuous 10.1kb fragment of the Cephalothrix rufifrons (Nemertea, Palaeonemertea) mitochondrial genome was sequenced and characterized to further assess organization of protostome mitochondrial genomes and evaluate the phylogenetic potential of gene arrangement and amino acid characters. The genome is A-T rich (72%), and this biased base composition is partly reflected in codon usage. Inferred tRNA secondary structures are typical of those reported for other metazoan mitochondrial DNAs. The arrangement of the 26 genes contained in the fragment exhibits marked similarity to those of many protostome taxa, most notably molluscs with highly conserved arrangements and a phoronid. Separate and simultaneous phylogenetic analyses of inferred amino acid sequences and gene adjacencies place the nemertean within the protostomes among coelomate lophotrochozoan taxa, but do not find a well-supported sister taxon link.

journal_name

Mol Phylogenet Evol

authors

Turbeville JM,Smith DM

doi

10.1016/j.ympev.2006.10.025

subject

Has Abstract

pub_date

2007-06-01 00:00:00

pages

1056-65

issue

3

eissn

1055-7903

issn

1095-9513

pii

S1055-7903(06)00425-8

journal_volume

43

pub_type

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