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Mutations in a new cytochrome P450 gene in lamellar ichthyosis type 3.

Identifieur interne : 000027 ( Main/Exploration ); précédent : 000026; suivant : 000028

Mutations in a new cytochrome P450 gene in lamellar ichthyosis type 3.

Auteurs : Caroline Lefèvre [France] ; Bakar Bouadjar ; Véronique Ferrand ; Gianluca Tadini ; André Mégarbané ; Mark Lathrop ; Jean-François Prud'Homme ; Judith Fischer

Source :

RBID : pubmed:16436457

Descripteurs français

English descriptors

Abstract

We report the identification of mutations in a non-syndromic autosomal recessive congenital ichthyosis (ARCI) in a new gene mapping within a previously identified locus on chromosome 19p12-q12, which has been defined as LI3 in the OMIM database (MIM 604777). The phenotype usually presents as lamellar ichthyosis and hyperlinearity of palms and soles. Seven homozygous mutations including five missense mutations and two deletions were identified in a new gene, FLJ39501, on chromosome 19p12 in 21 patients from 12 consanguineous families from Algeria, France, Italy and Lebanon. FLJ39501 encodes a protein which was found to be a cytochrome P450, family 4, subfamily F, polypeptide 2 homolog of the leukotriene B4-omega-hydroxylase (CYP4F2) and could catalyze the 20-hydroxylation of trioxilin A3 from the 12(R)-lipoxygenase pathway. Further oxidation of this substrate by the fatty alcohol:nicotinamide-adenine dinucleotide oxidoreductase (FAO) enzyme complex, in which one component, ALDH3A2, is known to be mutated in Sjögren-Larsson syndrome (characterized by ichthyosis and spastic paraplegia), would lead to 20-carboxy-(R)-trioxilin A3. This compound could be involved in skin hydration and would be the essential missing product in most forms of ARCI. Its chiral homolog, 20-carboxy-(S)-trioxilin A3, could be implicated in spastic paraplegia and in the maintenance of neuronal integrity.

DOI: 10.1093/hmg/ddi491
PubMed: 16436457


Affiliations:


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Le document en format XML

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<name sortKey="Prud Homme, Jean Francois" sort="Prud Homme, Jean Francois" uniqKey="Prud Homme J" first="Jean-François" last="Prud'Homme">Jean-François Prud'Homme</name>
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<name sortKey="Prud Homme, Jean Francois" sort="Prud Homme, Jean Francois" uniqKey="Prud Homme J" first="Jean-François" last="Prud'Homme">Jean-François Prud'Homme</name>
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<title level="j">Human molecular genetics</title>
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<keywords scheme="KwdEn" xml:lang="en">
<term>Algeria (ethnology)</term>
<term>Amino Acid Motifs (MeSH)</term>
<term>Amino Acid Sequence (MeSH)</term>
<term>Case-Control Studies (MeSH)</term>
<term>Cell Line (MeSH)</term>
<term>Chromosome Mapping (MeSH)</term>
<term>Chromosomes, Human, Pair 19 (MeSH)</term>
<term>Consanguinity (MeSH)</term>
<term>Cytochrome P-450 Enzyme System (chemistry)</term>
<term>Cytochrome P-450 Enzyme System (genetics)</term>
<term>DNA Mutational Analysis (MeSH)</term>
<term>Female (MeSH)</term>
<term>France (ethnology)</term>
<term>Gene Deletion (MeSH)</term>
<term>Genetic Linkage (MeSH)</term>
<term>Genetic Markers (MeSH)</term>
<term>Haplotypes (MeSH)</term>
<term>Humans (MeSH)</term>
<term>Ichthyosis, Lamellar (enzymology)</term>
<term>Ichthyosis, Lamellar (genetics)</term>
<term>Ichthyosis, Lamellar (pathology)</term>
<term>Ichthyosis, Lamellar (physiopathology)</term>
<term>Italy (ethnology)</term>
<term>Lebanon (ethnology)</term>
<term>Linkage Disequilibrium (MeSH)</term>
<term>Loss of Heterozygosity (MeSH)</term>
<term>Male (MeSH)</term>
<term>Microsatellite Repeats (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Molecular Weight (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Mutation, Missense (MeSH)</term>
<term>Pedigree (MeSH)</term>
<term>Protein Sorting Signals (MeSH)</term>
<term>Reverse Transcriptase Polymerase Chain Reaction (MeSH)</term>
<term>Tissue Distribution (MeSH)</term>
</keywords>
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<term>Algérie (ethnologie)</term>
<term>Analyse de mutations d'ADN (MeSH)</term>
<term>Cartographie chromosomique (MeSH)</term>
<term>Chromosomes humains de la paire 19 (MeSH)</term>
<term>Consanguinité (MeSH)</term>
<term>Cytochrome P-450 enzyme system (composition chimique)</term>
<term>Cytochrome P-450 enzyme system (génétique)</term>
<term>Distribution tissulaire (MeSH)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Délétion de gène (MeSH)</term>
<term>Déséquilibre de liaison (MeSH)</term>
<term>Femelle (MeSH)</term>
<term>France (ethnologie)</term>
<term>Haplotypes (MeSH)</term>
<term>Humains (MeSH)</term>
<term>Ichtyose lamellaire (anatomopathologie)</term>
<term>Ichtyose lamellaire (enzymologie)</term>
<term>Ichtyose lamellaire (génétique)</term>
<term>Ichtyose lamellaire (physiopathologie)</term>
<term>Italie (ethnologie)</term>
<term>Liaison génétique (MeSH)</term>
<term>Liban (ethnologie)</term>
<term>Lignée cellulaire (MeSH)</term>
<term>Marqueurs génétiques (MeSH)</term>
<term>Masse moléculaire (MeSH)</term>
<term>Motifs d'acides aminés (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Mutation faux-sens (MeSH)</term>
<term>Mâle (MeSH)</term>
<term>Pedigree (MeSH)</term>
<term>Perte d'hétérozygotie (MeSH)</term>
<term>RT-PCR (MeSH)</term>
<term>Répétitions microsatellites (MeSH)</term>
<term>Signaux de triage des protéines (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Études cas-témoins (MeSH)</term>
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<term>Cytochrome P-450 Enzyme System</term>
</keywords>
<keywords scheme="MESH" type="geographic" qualifier="ethnology" xml:lang="en">
<term>Algeria</term>
<term>France</term>
<term>Italy</term>
<term>Lebanon</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en">
<term>Cytochrome P-450 Enzyme System</term>
</keywords>
<keywords scheme="MESH" qualifier="anatomopathologie" xml:lang="fr">
<term>Ichtyose lamellaire</term>
</keywords>
<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr">
<term>Cytochrome P-450 enzyme system</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymologie" xml:lang="fr">
<term>Ichtyose lamellaire</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymology" xml:lang="en">
<term>Ichthyosis, Lamellar</term>
</keywords>
<keywords scheme="MESH" qualifier="ethnologie" xml:lang="fr">
<term>Algérie</term>
<term>France</term>
<term>Italie</term>
<term>Liban</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Ichthyosis, Lamellar</term>
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<term>Ichtyose lamellaire</term>
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<keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr">
<term>Ichtyose lamellaire</term>
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<keywords scheme="MESH" qualifier="physiopathology" xml:lang="en">
<term>Ichthyosis, Lamellar</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Amino Acid Motifs</term>
<term>Amino Acid Sequence</term>
<term>Case-Control Studies</term>
<term>Cell Line</term>
<term>Chromosome Mapping</term>
<term>Chromosomes, Human, Pair 19</term>
<term>Consanguinity</term>
<term>DNA Mutational Analysis</term>
<term>Female</term>
<term>Gene Deletion</term>
<term>Genetic Linkage</term>
<term>Genetic Markers</term>
<term>Haplotypes</term>
<term>Humans</term>
<term>Linkage Disequilibrium</term>
<term>Loss of Heterozygosity</term>
<term>Male</term>
<term>Microsatellite Repeats</term>
<term>Molecular Sequence Data</term>
<term>Molecular Weight</term>
<term>Mutation</term>
<term>Mutation, Missense</term>
<term>Pedigree</term>
<term>Protein Sorting Signals</term>
<term>Reverse Transcriptase Polymerase Chain Reaction</term>
<term>Tissue Distribution</term>
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<term>Cartographie chromosomique</term>
<term>Chromosomes humains de la paire 19</term>
<term>Consanguinité</term>
<term>Distribution tissulaire</term>
<term>Données de séquences moléculaires</term>
<term>Délétion de gène</term>
<term>Déséquilibre de liaison</term>
<term>Femelle</term>
<term>Haplotypes</term>
<term>Humains</term>
<term>Liaison génétique</term>
<term>Lignée cellulaire</term>
<term>Marqueurs génétiques</term>
<term>Masse moléculaire</term>
<term>Motifs d'acides aminés</term>
<term>Mutation</term>
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<term>Perte d'hétérozygotie</term>
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<term>France</term>
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<term>Liban</term>
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<front>
<div type="abstract" xml:lang="en">We report the identification of mutations in a non-syndromic autosomal recessive congenital ichthyosis (ARCI) in a new gene mapping within a previously identified locus on chromosome 19p12-q12, which has been defined as LI3 in the OMIM database (MIM 604777). The phenotype usually presents as lamellar ichthyosis and hyperlinearity of palms and soles. Seven homozygous mutations including five missense mutations and two deletions were identified in a new gene, FLJ39501, on chromosome 19p12 in 21 patients from 12 consanguineous families from Algeria, France, Italy and Lebanon. FLJ39501 encodes a protein which was found to be a cytochrome P450, family 4, subfamily F, polypeptide 2 homolog of the leukotriene B4-omega-hydroxylase (CYP4F2) and could catalyze the 20-hydroxylation of trioxilin A3 from the 12(R)-lipoxygenase pathway. Further oxidation of this substrate by the fatty alcohol:nicotinamide-adenine dinucleotide oxidoreductase (FAO) enzyme complex, in which one component, ALDH3A2, is known to be mutated in Sjögren-Larsson syndrome (characterized by ichthyosis and spastic paraplegia), would lead to 20-carboxy-(R)-trioxilin A3. This compound could be involved in skin hydration and would be the essential missing product in most forms of ARCI. Its chiral homolog, 20-carboxy-(S)-trioxilin A3, could be implicated in spastic paraplegia and in the maintenance of neuronal integrity.</div>
</front>
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<affiliations>
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<name sortKey="Megarbane, Andre" sort="Megarbane, Andre" uniqKey="Megarbane A" first="André" last="Mégarbané">André Mégarbané</name>
<name sortKey="Prud Homme, Jean Francois" sort="Prud Homme, Jean Francois" uniqKey="Prud Homme J" first="Jean-François" last="Prud'Homme">Jean-François Prud'Homme</name>
<name sortKey="Tadini, Gianluca" sort="Tadini, Gianluca" uniqKey="Tadini G" first="Gianluca" last="Tadini">Gianluca Tadini</name>
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<name sortKey="Lefevre, Caroline" sort="Lefevre, Caroline" uniqKey="Lefevre C" first="Caroline" last="Lefèvre">Caroline Lefèvre</name>
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