Background and Objectives. Diamond Blackfan anemia (DBA) is a congenital disease characterized by defective erythroid progenitor maturation. Patients' bone marrow progenitor cells do not respond to erythropoietic growth factors, such as erythropoietin. Mutations in the gene encoding for ribosomal protein (RP) S19 account for 25% of cases of DBA. The link between defective erythropoiesis and RPS19 is still unclear. Two not mutually exclusive hypotheses have been proposed: altered protein synthesis and loss of unknown extraribosomal functions. Design and Methods. We used yeast two-hybrid screening and a human liver cDNA library obtained at 19-24 weeks of gestation, when hepatic erythropoiesis is efficient, to search for proteins interacting with RPS19. Results. We found that RPS19 binds PIM-1, an ubiquitous serine-threonine kinase whose expression can be induced in erythropoietic cells by several growth factors, such as erythropoietin. The PIM-1/RPS19 interaction was demonstrated both in vitro and in living cells and led to phosphorylation of RPS19 in an in vitro kinase assay. We also showed that in human 293T cells PIM-1 interacts with ribosomes and may be involved in translational control. Three DBA-associated RPS19 mutations alter the binding between RPS19 and PIM-1. Interpretation and Conclusions. A link between erythropoietic growth factor signaling and RPS19 has been identified for the first time.

Chiocchetti, A., Gibello, L., Carando, A., Aspesi, A., Secco, P., Garelli, E., et al. (2005). Interactions between RPS19, mutated in Diamond-Blackfan anemia, and the PIM-1 oncoprotein. HAEMATOLOGICA, 90(11), 1453-1462.

Interactions between RPS19, mutated in Diamond-Blackfan anemia, and the PIM-1 oncoprotein

LORENI, FABRIZIO;
2005-01-01

Abstract

Background and Objectives. Diamond Blackfan anemia (DBA) is a congenital disease characterized by defective erythroid progenitor maturation. Patients' bone marrow progenitor cells do not respond to erythropoietic growth factors, such as erythropoietin. Mutations in the gene encoding for ribosomal protein (RP) S19 account for 25% of cases of DBA. The link between defective erythropoiesis and RPS19 is still unclear. Two not mutually exclusive hypotheses have been proposed: altered protein synthesis and loss of unknown extraribosomal functions. Design and Methods. We used yeast two-hybrid screening and a human liver cDNA library obtained at 19-24 weeks of gestation, when hepatic erythropoiesis is efficient, to search for proteins interacting with RPS19. Results. We found that RPS19 binds PIM-1, an ubiquitous serine-threonine kinase whose expression can be induced in erythropoietic cells by several growth factors, such as erythropoietin. The PIM-1/RPS19 interaction was demonstrated both in vitro and in living cells and led to phosphorylation of RPS19 in an in vitro kinase assay. We also showed that in human 293T cells PIM-1 interacts with ribosomes and may be involved in translational control. Three DBA-associated RPS19 mutations alter the binding between RPS19 and PIM-1. Interpretation and Conclusions. A link between erythropoietic growth factor signaling and RPS19 has been identified for the first time.
2005
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/11 - BIOLOGIA MOLECOLARE
English
Con Impact Factor ISI
complementary DNA; endopeptidase La; erythropoietin; growth factor; oncoprotein; protein s19; ribosome protein; steroid; unclassified drug; article; Blackfan Diamond anemia; blood transfusion; controlled study; embryo; enzyme assay; erythropoiesis; female; fetus; gene mutation; gestation period; human; human cell; human tissue; liver; male; nucleotide sequence; protein binding; protein expression; protein phosphorylation; protein protein interaction; ribosome; RNA translation; two hybrid system; yeast; Amino Acid Sequence; Anemia, Diamond-Blackfan; Animals; Cell Line; Erythropoiesis; Gene Library; Humans; Molecular Sequence Data; Mutation; Phosphorylation; Protein Binding; Protein Interaction Mapping; Proto-Oncogene Proteins c-pim-1; Rabbits; Ribosomal Proteins; Yeasts
Chiocchetti, A., Gibello, L., Carando, A., Aspesi, A., Secco, P., Garelli, E., et al. (2005). Interactions between RPS19, mutated in Diamond-Blackfan anemia, and the PIM-1 oncoprotein. HAEMATOLOGICA, 90(11), 1453-1462.
Chiocchetti, A; Gibello, L; Carando, A; Aspesi, A; Secco, P; Garelli, E; Loreni, F; Ii,
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/37088
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