Aliases for NPM1 Gene
External Ids for NPM1 Gene
Previous GeneCards Identifiers for NPM1 Gene
The protein encoded by this gene is involved in several cellular processes, including centrosome duplication, protein chaperoning, and cell proliferation. The encoded phosphoprotein shuttles between the nucleolus, nucleus, and cytoplasm, chaperoning ribosomal proteins and core histones from the nucleus to the cytoplasm. This protein is also known to sequester the tumor suppressor ARF in the nucleolus, protecting it from degradation until it is needed. Mutations in this gene are associated with acute myeloid leukemia. Dozens of pseudogenes of this gene have been identified. [provided by RefSeq, Aug 2017]
AML with mutated NPM1 is a provisional entity in the WHO classification of AML and is recommended to be tested in patients with cytogenetically normal AML (CN-AML). FLT3 mutations should be evaluated concurrently as they have prognostic consequences. NPM1 mutations are concentrated in exon 12, most frequently W288fs which results in cytoplasmic sequestration of the protein. Exon 12 NPM1 mutations in the absence of FLT3-ITD are associated with good prognostic outcomes. Mice expressing the Npm1-W288fs mutation develop myeloproliferative neoplasms but not overt leukemia, indicating it may require additional mutations to promote leukemic development.
GeneCards Summary for NPM1 Gene
NPM1 (Nucleophosmin 1) is a Protein Coding gene. Diseases associated with NPM1 include Lymphomatoid Papulosis and Leukemia, Acute Myeloid. Among its related pathways are Development HGF signaling pathway and Tyrosine Kinases / Adaptors. Gene Ontology (GO) annotations related to this gene include nucleic acid binding and protein homodimerization activity. An important paralog of this gene is NPM2.
UniProtKB/Swiss-Prot Summary for NPM1 Gene
Involved in diverse cellular processes such as ribosome biogenesis, centrosome duplication, protein chaperoning, histone assembly, cell proliferation, and regulation of tumor suppressors p53/TP53 and ARF. Binds ribosome presumably to drive ribosome nuclear export. Associated with nucleolar ribonucleoprotein structures and bind single-stranded nucleic acids. Acts as a chaperonin for the core histones H3, H2B and H4. Stimulates APEX1 endonuclease activity on apurinic/apyrimidinic (AP) double-stranded DNA but inhibits APEX1 endonuclease activity on AP single-stranded RNA. May exert a control of APEX1 endonuclease activity within nucleoli devoted to repair AP on rDNA and the removal of oxidized rRNA molecules. In concert with BRCA2, regulates centrosome duplication. Regulates centriole duplication: phosphorylation by PLK2 is able to trigger centriole replication. Negatively regulates the activation of EIF2AK2/PKR and suppresses apoptosis through inhibition of EIF2AK2/PKR autophosphorylation. Antagonizes the inhibitory effect of ATF5 on cell proliferation and relieves ATF5-induced G2/M blockade (PubMed:22528486). In complex with MYC enhances the transcription of MYC target genes (PubMed:25956029).