Gender-associated diverse mitochondrial DNA molecules of the mussel Mytilus californianus.
The Pacific-rim, dioecious bivalve Mytilus californianus contains two distinct sequence types of mitochondrial (mt) DNA that are gender-limited in their occurrence. One type (F) is found in both females and males, but the second type (M) is strictly limited to males. Although F- and M-type mtDNAs occur in approximately equal proportion in testes, there is a preponderance of M-type in sperm. Segments of the COI and ND5 genes of F-type and M-type mtDNAs differ in nucleotide sequence by 21.1% and 31.6%, and in predicted amino-acid sequence by 7.9% and 27.1%, respectively. These latter observations raise hitherto unconsidered questions regarding the number of different variants of cytochrome c oxidase and NADH dehydrogenase that may occur in Mytilus non-gametic male cells.
Beagley
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Department of Biology, University of Utah, Salt Lake City, UT 84112, USA.
Taylor
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Wolstenholme
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D000595:Amino Acid Sequence; D000818:Animals; D001345:Autoradiography; D001483:Base Sequence; D049872:Bivalvia / Q000235:genetics*; D017931:DNA Primers; D004272:DNA, Mitochondrial / Q000235:genetics* / Q000378:metabolism; D015252:Deoxyribonucleases, Type II Site-Specific / Q000235:genetics / Q000378:metabolism; D003576:Electron Transport Complex IV / Q000235:genetics*; D004587:Electrophoresis, Agar Gel; D005260:Female; D017403:In Situ Hybridization / Q000379:methods; D008297:Male; D008969:Molecular Sequence Data; D010053:Ovary / Q000502:physiology; D016133:Polymerase Chain Reaction / Q000379:methods; D017386:Sequence Homology, Amino Acid; D012727:Sex Characteristics; D013094:Spermatozoa / Q000502:physiology; D013737:Testis / Q000502:physiology
D017931:DNA Primers; D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV; C034510:CTCGAG-specific type II deoxyribonucleases; C024388:CTGCAG-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific