Abstract:
:We have investigated the distribution of mitochondrial DNA polymorphisms in a rare maternally transmitted genetic trait that causes hypersensitivity to aminoglycoside antibiotics, in the hope that a characterization of its molecular basis might provide a molecular and cellular understanding of aminoglycoside-induced deafness (AGD). Here we report that the frequency of a particular mitochondrial DNA polymorphism, 1555G, is associated nonrandomly with aminoglycoside-induced deafness in two Japanese pedigrees, bringing the frequency of this polymorphism to 5 occurrences in 5 pedigrees of AGD, and in 4 of 78 sporadic cases in which deafness was thought to be the result of aminoglycoside exposure; both frequencies are significantly different from the occurrence of this mutation in the hearing population, which was 0 in 414 individuals surveyed. The 1555G polymorphism occurred in none of 34 aminoglycoside-resistant individuals. We propose a specific molecular mechanism for aminoglycoside hypersensitivity in individuals carrying the 1555G polymorphism, based on the three-dimensional structure of the ribosome, in which the 1555G polymorphism favors aminoglycoside binding sterically, by increasing access to the the ribosome cleft.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Hutchin T,Haworth I,Higashi K,Fischel-Ghodsian N,Stoneking M,Saha N,Arnos C,Cortopassi Gdoi
10.1093/nar/21.18.4174subject
Has Abstractpub_date
1993-09-11 00:00:00pages
4174-9issue
18eissn
0305-1048issn
1362-4962journal_volume
21pub_type
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