Identification of novel DNA-damage tolerance genes reveals regulation of translesion DNA synthesis by nucleophosmin

Omer Ziv, Amit Zeisel, Nataly Mirlas-Neisberg, Umakanta Swain, Reinat Nevo, Nir Ben-Chetrit, Maria Paola Martelli, Roberta Rossi, Stefan Schiesser, Christine E. Canman, Thomas Carell, Nicholas Geacintov, Brunangelo Falini, Eytan Domany, Zvi Livneh

Research output: Contribution to journalArticle

Abstract

Cells cope with replication-blocking lesions via translesion DNA synthesis (TLS). TLS is carried out by low-fidelity DNA polymerases that replicate across lesions, thereby preventing genome instability at the cost of increased point mutations. Here we perform a two-stage siRNA-based functional screen for mammalian TLS genes and identify 17 validated TLS genes. One of the genes, NPM1, is frequently mutated in acute myeloid leukaemia (AML). We show that NPM1 (nucleophosmin) regulates TLS via interaction with the catalytic core of DNA polymerase-n (poln), and that NPM1 deficiency causes a TLS defect due to proteasomal degradation of poln. Moreover, the prevalent NPM1c+ mutation that causes NPM1 mislocalization in ∼30% of AML patients results in excessive degradation of poln. These results establish the role of NPM1 as a key TLS regulator, and suggest a mechanism for the better prognosis of AML patients carrying mutations in NPM1.

Original languageEnglish (US)
Article number5437
JournalNature Communications
Volume5
DOIs
StatePublished - 2014

Fingerprint

Damage tolerance
gene expression
Gene expression
DNA Damage
deoxyribonucleic acid
damage
DNA
synthesis
Genes
Acute Myeloid Leukemia
leukemias
mutations
genes
DNA-Directed DNA Polymerase
lesions
Catalytic DNA
Degradation
Mutation
Genomic Instability
degradation

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Ziv, O., Zeisel, A., Mirlas-Neisberg, N., Swain, U., Nevo, R., Ben-Chetrit, N., ... Livneh, Z. (2014). Identification of novel DNA-damage tolerance genes reveals regulation of translesion DNA synthesis by nucleophosmin. Nature Communications, 5, [5437]. https://doi.org/10.1038/ncomms6437

Identification of novel DNA-damage tolerance genes reveals regulation of translesion DNA synthesis by nucleophosmin. / Ziv, Omer; Zeisel, Amit; Mirlas-Neisberg, Nataly; Swain, Umakanta; Nevo, Reinat; Ben-Chetrit, Nir; Martelli, Maria Paola; Rossi, Roberta; Schiesser, Stefan; Canman, Christine E.; Carell, Thomas; Geacintov, Nicholas; Falini, Brunangelo; Domany, Eytan; Livneh, Zvi.

In: Nature Communications, Vol. 5, 5437, 2014.

Research output: Contribution to journalArticle

Ziv, O, Zeisel, A, Mirlas-Neisberg, N, Swain, U, Nevo, R, Ben-Chetrit, N, Martelli, MP, Rossi, R, Schiesser, S, Canman, CE, Carell, T, Geacintov, N, Falini, B, Domany, E & Livneh, Z 2014, 'Identification of novel DNA-damage tolerance genes reveals regulation of translesion DNA synthesis by nucleophosmin', Nature Communications, vol. 5, 5437. https://doi.org/10.1038/ncomms6437
Ziv, Omer ; Zeisel, Amit ; Mirlas-Neisberg, Nataly ; Swain, Umakanta ; Nevo, Reinat ; Ben-Chetrit, Nir ; Martelli, Maria Paola ; Rossi, Roberta ; Schiesser, Stefan ; Canman, Christine E. ; Carell, Thomas ; Geacintov, Nicholas ; Falini, Brunangelo ; Domany, Eytan ; Livneh, Zvi. / Identification of novel DNA-damage tolerance genes reveals regulation of translesion DNA synthesis by nucleophosmin. In: Nature Communications. 2014 ; Vol. 5.
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