Identification of NOM1, a nucleolar, eIF4A binding protein encoded within the chromosome 7q36 breakpoint region targeted in cases of pediatric acute myeloid leukemia.
Gene
; 347(1): 137-45, 2005 Feb 28.
Article
em En
| MEDLINE
| ID: mdl-15715967
ABSTRACT
Proteins that contain the recently described MIF4G and/or MA3 domains function in translation, cell growth, proliferation, transformation, and apoptosis. Examples of MIF4G/MA3 containing proteins and their functions include eIF4G, which serves as a scaffold for assembly of factors required for translation initiation, programmed cell death protein 4 (Pdcd4) that inhibits translation and functions as a tumor suppressor, and NMD2, which is essential for nonsense-mediated mRNA decay. MIF4G and MA3 domains serve as binding sites for one or more isoforms of the eIF4A family of ATP-dependent DEAD-box RNA helicases that are required for translation and for nonsense-mediated decay. In this report, we describe the characterization of a novel MIF4G/MA3 family member called NOM1 (nucleolar protein with MIF4G domain 1) that was identified at the chromosome 7q36 breakpoint involved in 7;12 translocations associated with certain acute leukemias of childhood. NOM1, which includes a previously described EST called c7orf3, encodes a ubiquitously expressed transcript composed of 11 exons and an approximately 3 kb 3' UTR that contains several Alu repeats. The predicted NOM1 protein contains one MIF4G domain and one MA3 domain and, consistent with data obtained with other MIF4G/MA3 proteins, interacts with members of the eIF4A family of helicases. Database searches reveal that NOM1 homologs exist in several organisms and that at least two of these are essential genes. Finally, like its Saccharomyces cerevisiae homolog Sgd1p, NOM1 localizes predominantly to the nucleolus. These data demonstrate that NOM1 is a new member of the MIF4G/MA3 family of proteins and suggest that it may provide an essential function in metazoans.
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Base de dados:
MEDLINE
Assunto principal:
Cromossomos Humanos Par 7
/
Proteínas Nucleares
/
Leucemia Mieloide Aguda
/
Éxons
/
Proteínas de Ligação a RNA
/
Fator de Iniciação 4A em Eucariotos
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Gene
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Estados Unidos