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Cytochrome P450 oxidoreductase: Structurally functional study. Molecular pathology of Antley-Bixler syndrome.
Tomková, Mária ; Martásek, Pavel (advisor) ; Mazura, Ivan (referee) ; Králová, Jarmila (referee)
NADPH-P450 oxidoreductase (POR) is a membrane bound flavoprotein that donates electrons to a wide spectrum of heme-containing proteins, among which are several steroidogenic and many xenobiotics-metabolizing enzymes. Given the important role of POR protein in drug metabolism and pharmacogenomics, there is a particular need to understand the contributions of POR genetic variants to these processes. Mutations in POR gene cause a disorder called POR deficiency, which manifests with a wide phenotypic spectrum ranging from disordered steroidogenesis to skeletal malformation, namely, Antley-Bixler syndrome (ABS). The aim of the present work was to investigate the POR gene in patients suspected to have POR deficiency syndrome from Czech Republic and to perform genotyping in Czech and Jewish control populations. We analyzed 644 alleles in unrelated individuals from the general Czech population and 1128 alleles in Jewish population, where 330 alleles were of Askhenazi and 798 of Sephardic Jews. We have also studied the impact of selected new genetic variants on POR activity and identified fourteen amino acid variations, two of which we have studied in detail to establish their influence on POR activity. Using the available human POR three-dimensional structure, we then modelled the newly identified variants...

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1 TOMKOVÁ, Michala
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1 Tomková, Milada
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