Search results for "Aphidicolin"

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DNA replication arrest in response to genotoxic stress provokes early activation of stress-activated protein kinases (SAPK/JNK).

2009

Abstract The impact of DNA damage-induced replication blockage for early activation of stress kinases [stress-activated protein kinase (SAPK)/c-Jun N-terminal kinase (JNK)] is largely unknown. Here, we show that induction of dual phosphorylation of SAPK/JNK by the DNA polymerase inhibitor aphidicolin was not ameliorated by additional exposure to ultraviolet (UV) light, indicating that overlapping mechanisms participate in signaling to SAPK/JNK triggered by both agents. UV-induced DNA replication blockage, cyclobutane pyrimidine dimer formation and DNA strand break induction coincided with SAPK/JNK phosphorylation at early (≤ 30 min) but not late (≥ 2 h) time points after exposure. Genotoxin…

AphidicolinDNA ReplicationDNA damageUltraviolet RaysPoly ADP ribose polymeraseCell Linechemistry.chemical_compoundMiceAphidicolinStructural BiologyCricetinaeAnimalsHumansLymphocytesPhosphorylationProtein kinase AMolecular BiologyNucleic Acid Synthesis InhibitorsBRCA2 ProteinMice KnockoutbiologyKinaseCell CycleDNA replicationJNK Mitogen-Activated Protein KinasesFibroblastsMolecular biologyProliferating cell nuclear antigenDNA-Binding ProteinsEnzyme ActivationchemistryPyrimidine Dimersbiology.proteinPhosphorylationApoptosis Regulatory ProteinsDNA DamageJournal of molecular biology
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