Gene contents and organization of a mitochondrial DNA segment of the squid Loligo bleekeri.
The nucleotide sequence of a 9240-base pair DNA fragment of the mitochondrial (mt) genome of a squid, Loligo bleekeri, was determined, in which 8 protein and 14 tRNA genes were identified. The gene organization of the mt-genome exhibits a greater resemblance to the gene organization of arthropods and a chiton, Katharina tunicata, than to those of a mussel, Mytilus edulis, and land snails. A cloverleaf-like structure was observed between the genes for subunits 4 and 5 of NADH dehydrogenase (ND4 and -5), which is considered to have originated from histidine tRNA. It is presumed that this structure functions as a transcriptional punctuation signal for the maturation of the ND4 and ND5 mRNAs.
Sasuga
J
J
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8501, Japan.
Yokobori
S
S
Kaifu
M
M
Ueda
T
T
Nishikawa
K
K
Watanabe
K
K
D000251:Adenosine Triphosphatases / Q000235:genetics; D000595:Amino Acid Sequence; D000818:Animals; D001181:Arthropods / Q000235:genetics; D001482:Base Composition; D001483:Base Sequence; D004272:DNA, Mitochondrial / Q000235:genetics*; D049832:Decapodiformes / Q000235:genetics*; D005796:Genes; D008969:Molecular Sequence Data; D009245:NADH Dehydrogenase / Q000235:genetics; D012343:RNA, Transfer / Q000235:genetics; D014158:Transcription, Genetic
D004272:DNA, Mitochondrial; D012343:RNA, Transfer; D009245:NADH Dehydrogenase; D000251:Adenosine Triphosphatases