M. Koenig

Publications223
h-index59
Citations21,885
Highly Influential Citations781
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Friedreich's Ataxia: Autosomal Recessive Disease Caused by an Intronic GAA Triplet Repeat Expansion
TLDR
A few FRDA patients were found to have point mutations in X25, but the majority were homozygous for an unstable GAA trinucleotide expansion in the first X25 intron. Expand
Complete cloning of the duchenne muscular dystrophy (DMD) cDNA and preliminary genomic organization of the DMD gene in normal and affected individuals
TLDR
The 14 kb human Duchenne muscular dystrophy cDNA corresponding to a complete representation of the fetal skeletal muscle transcript has been cloned and the majority of deletions are concentrated in a single genomic segment corresponding to only 2 kb of the transcript. Expand
Clinical and genetic abnormalities in patients with Friedreich's ataxia.
TLDR
The clinical spectrum of Friedreich's ataxia is broader than previously recognized, and the direct molecular test for the GAA expansion on chromosome 9 is useful for diagnosis, determination of prognosis, and genetic counseling. Expand
The complete sequence of dystrophin predicts a rod-shaped cytoskeletal protein
TLDR
The complete sequence of the human Duchenne muscular dystrophy cDNA has been determined and dystrophin shares many features with the cytoskeletal protein spectrin and alpha-actinin and is likely to adopt a rod shape about 150 nm in length. Expand
Mouse models for Friedreich ataxia exhibit cardiomyopathy, sensory nerve defect and Fe-S enzyme deficiency followed by intramitochondrial iron deposits
TLDR
The authors' models demonstrate time-dependent intramitochondrial iron accumulation in a frataxin-deficient mammal, which occurs after onset of the pathology and after inactivation of the Fe-S-dependent enzymes. Expand
Aconitase and mitochondrial iron–sulphur protein deficiency in Friedreich ataxia
TLDR
A deficient activity of the iron-sulphur (Fe-S) cluster-containing subunits of mitochondrial respiratory complexes I, II and III in the endomyocardial biopsy of two unrelated FRDA patients was found to be deficient. Expand
The gene mutated in ataxia-ocular apraxia 1 encodes the new HIT/Zn-finger protein aprataxin
TLDR
The results suggest that aprataxin is a nuclear protein with a role in DNA repair reminiscent of the function of the protein defective in ataxia-telangiectasia, but that would cause a phenotype restricted to neurological signs when mutant. Expand
The molecular basis for Duchenne versus Becker muscular dystrophy: correlation of severity with type of deletion.
TLDR
The distribution and frequency of deletions spanning the entire locus suggests that many "in-frame" deletions of the dystrophin gene are not detected because the individuals bearing them are either asymptomatic or exhibit non-DMD/non-BMD clinical features. Expand
Frataxin is reduced in Friedreich ataxia patients and is associated with mitochondrial membranes.
TLDR
The data suggest that a reduction in frataxin results in oxidative damage, given the shared clinical features between Friedreich ataxia, vitamin E deficiency and some mitochondriopathies. Expand
Mutations in ABHD12 cause the neurodegenerative disease PHARC: An inborn error of endocannabinoid metabolism.
TLDR
The findings show that ABHD12 performs essential functions in both the central and peripheral nervous systems and the eye, and any future drug-mediated interference with this enzyme should consider the potential risk of long-term adverse effects. Expand
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