منابع مشابه
Mitochondrial DNA Mutations, Pathogenicity and Inheritance
Mitochondria contain their own DNA (mtDNA), which codes for 13 proteins (all subunits of the respiratory chain complexes), 22 tRNAs and 2 rRNAs. Several mtDNA point mutations as well as deletions have been shown to be causative in well-defined mitochondrial disorders. A mixture of mutated and wild type mtDNA (heteroplasmy) is found in most of these disorders. Inheritance of mtDNA is maternal, a...
متن کاملMechanisms of Uniparental Mitochondrial DNA Inheritance in Cryptococcus neoformans
In contrast to the nuclear genome, the mitochondrial genome does not follow Mendelian laws of inheritance. The nuclear genome of meiotic progeny comes from the recombination of both parental genomes, whereas the meiotic progeny could inherit mitochondria from one, the other, or both parents. In fact, one fascinating phenomenon is that mitochondrial DNA in the majority of eukaryotes is inherited...
متن کاملUniparental inheritance and replacement of mitochondrial DNA in Neurospora tetrasperma.
This study tested mechanisms proposed for maternal uniparental mitochondrial inheritance in Neurospora: (1) exclusion of conidial mitochondria by the specialized female reproductive structure, trichogyne, due to mating locus heterokaryon incompatibility and (2) mitochondrial input bias favoring the larger trichogyne over the smaller conidium. These mechanisms were tested by determining the mode...
متن کاملMore evidence for non-maternal inheritance of mitochondrial DNA?
BACKGROUND A single case of paternal co-transmission of mitochondrial DNA (mtDNA) in humans has been reported so far. OBJECTIVE To find potential instances of non-maternal inheritance of mtDNA. METHODS Published medical case studies (of single patients) were searched for irregular mtDNA patterns by comparing the given haplotype information for different clones or tissues with the worldwide ...
متن کاملKeeping in Shape the Dogma of Mitochondrial DNA Maternal Inheritance
It is textbook knowledge that the small multicopy mitochondrial genome (mtDNA) is maternally inherited in humans and mammals [1,2]. The uniparental mtDNA inheritance applies to most eukaryotic organisms, including animals exhibiting the doubly uniparental inheritance, such as the bivalve mollusks [3,4]. Occurrence of paternal mtDNA transmission has also been documented [5–7], and doubts on stri...
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ژورنال
عنوان ژورنال: Nature
سال: 1994
ISSN: 0028-0836,1476-4687
DOI: 10.1038/368818a0