Identification of a novel candidate gene in the iron-sulfur pathway implicated in ataxia-susceptibility: human gene encoding HscB, a J-type co-chaperone.
J Hum Genet
; 48(8): 415-419, 2003.
Article
em En
| MEDLINE
| ID: mdl-12938016
ABSTRACT
Iron-sulfur proteins participate in a wide range of biochemical processes, including many that are central to mitochondrial electron transfer and energy metabolism. Mutations in two such proteins, frataxin and ABCB7, cause Friedreich ataxia and X-linked sideroblastic anemia with ataxia, respectively, rendering other participants in this pathway functional candidates for hereditary ataxia syndromes. Recently frataxin was shown to have an identical phylogenetic distribution with two genes and was most likely specifically involved in the same sub-process in iron-sulfur cluster assembly as one gene, designated hscB, in bacteria. To set the stage for an analysis of the potential role of this candidate gene in human disease, we defined the human HscB cDNA, its genomic locus, and its pattern of expression in normal human tissues. The isolated human HscB cDNA spans 785 bp and encodes a conserved 235-amino-acid protein, including a putative mitochondrial import leader. The HscB gene is found at chromosome 22q11-12 and is composed of six exons and five introns. Northern blot analyses of RNA from adult and fetal tissues defined a pattern of expression in mitochondria-rich tissues similar to that of frataxin, an expression pattern compatible with its implied role in mitochondrial energetics and related disease phenotypes.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Ataxia
/
Enxofre
/
Chaperonas Moleculares
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Proteínas de Escherichia coli
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Proteínas de Choque Térmico
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Ferro
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
J Hum Genet
Assunto da revista:
GENETICA MEDICA
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Estados Unidos