Featured Publications
Polo-like Kinase 1 and Chk2 Interact and Co-localize to Centrosomes and the Midbody*
Tsvetkov L, Xu X, Li J, Stern DF. Polo-like Kinase 1 and Chk2 Interact and Co-localize to Centrosomes and the Midbody*. Journal Of Biological Chemistry 2002, 278: 8468-8475. PMID: 12493754, DOI: 10.1074/jbc.m211202200.Peer-Reviewed Original ResearchConceptsPhosphorylation of Chk2Polo-like kinase 1Thr-68DNA damageSimilar subcellular localization patternsDNA damage checkpoint pathwayKinase 1Damage checkpoint pathwaySubcellular localization patternsChromosome segregationMitotic exitLate mitosisNuclear fociMitotic entryIndirect immunofluorescence microscopyMitotic checkpointSer-28Early mitosisCheckpoint pathwayChk2Localization patternsCentrosomesThr-26Immunofluorescence microscopyMidbody
2005
Activation of the Checkpoint Kinase Rad53 by the Phosphatidyl Inositol Kinase-like Kinase Mec1*
Ma JL, Lee SJ, Duong JK, Stern DF. Activation of the Checkpoint Kinase Rad53 by the Phosphatidyl Inositol Kinase-like Kinase Mec1*. Journal Of Biological Chemistry 2005, 281: 3954-3963. PMID: 16365046, DOI: 10.1074/jbc.m507508200.Peer-Reviewed Original ResearchConceptsPhosphorylation-dependent mechanismDNA damageKinase activityDNA replication checkpoint pathwayRad53 kinase activityCheckpoint kinase Rad53Essential protein kinaseReplication checkpoint pathwayActivation of Rad53Protein kinase activityMammalian Chk2Rad53 phosphorylationRad53 activationRad53Protein kinaseDownstream responsesCheckpoint pathwayOrthologsAutophosphorylationKinasePhosphorylationIntermolecular mechanismActivationPIKKsComplexes
2004
A Ddc2-Rad53 Fusion Protein Can Bypass the Requirements for RAD9 and MRC1 in Rad53 Activation
Lee SJ, Duong JK, Stern DF. A Ddc2-Rad53 Fusion Protein Can Bypass the Requirements for RAD9 and MRC1 in Rad53 Activation. Molecular Biology Of The Cell 2004, 15: 5443-5455. PMID: 15456903, PMCID: PMC532024, DOI: 10.1091/mbc.e04-07-0608.Peer-Reviewed Original ResearchConceptsDNA damageDNA damage checkpoint pathwayFusion proteinDamage checkpoint pathwayRad53p activationRad53 activationMethyl methaneCheckpoint pathwaySignaling systemCell survivalMediator requirementMec1pEssential roleProteinCellsActivationExpressionRad53pRad9pDdc2Rad9Mrc1pMinimal requirementsMrc1Oligomerization
2003
FHA Domain-Mediated DNA Checkpoint Regulation of Rad53
Schwartz MF, Lee SJ, Duong JK, Eminaga S, Stern DF. FHA Domain-Mediated DNA Checkpoint Regulation of Rad53. Cell Cycle 2003, 2: 381-394. PMID: 12851493, DOI: 10.4161/cc.2.4.457.Peer-Reviewed Original ResearchConceptsDNA damage checkpoint pathwayDamage checkpoint pathwayFHA domainReplication blocksCheckpoint pathwayChromatin assembly factor Asf1Phosphorylation-dependent associationDNA damageDNA replication checkpointActivation of Rad53Phosphopeptide binding domainsReplication checkpointReplicational stressDNA checkpointCheckpoint defectRad53Checkpoint regulationCatalytic domainProtein kinaseFHA1Binding domainsAsf1FHA2Persistent activationPathway
2002
Chk2 Activation and Phosphorylation-Dependent Oligomerization
Xu X, Tsvetkov LM, Stern DF. Chk2 Activation and Phosphorylation-Dependent Oligomerization. Molecular And Cellular Biology 2002, 22: 4419-4432. PMID: 12024051, PMCID: PMC133858, DOI: 10.1128/mcb.22.12.4419-4432.2002.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAtaxia Telangiectasia Mutated ProteinsBinding SitesCell Cycle ProteinsCell-Free SystemCells, CulturedCheckpoint Kinase 2DNA DamageDNA-Binding ProteinsEnzyme ActivationFibroblastsGenes, Tumor SuppressorHumansMutationPhosphorylationProtein KinasesProtein Serine-Threonine KinasesProtein Structure, TertiaryRabbitsRadiation, IonizingRecombinant ProteinsSignal TransductionTumor Suppressor ProteinsConceptsSQ/TQ cluster domainsChk2 activationDNA damageDNA damage checkpoint pathwaySerine/threonine kinaseAutophosphorylation of Chk2Phosphorylation-dependent oligomerizationDamage checkpoint pathwayKinase catalytic domainForkhead-associated (FHA) domainWortmannin-sensitive kinaseChk2 kinase activityLimited DNA damageAmino acid substitutionsCell-free systemEukaryotic proteinsFHA domainActive Chk2Threonine kinaseCheckpoint functionCatalytic domainOligomeric complexesCheckpoint pathwayKinase activityChk2
1997
A role for DNA primase in coupling DNA replication to DNA damage response
Marini F, Pellicioli A, Paciotti V, Lucchini G, Plevani P, Stern D, Foiani M. A role for DNA primase in coupling DNA replication to DNA damage response. The EMBO Journal 1997, 16: 639-650. PMID: 9034345, PMCID: PMC1169666, DOI: 10.1093/emboj/16.3.639.Peer-Reviewed Original ResearchMeSH KeywordsBlotting, WesternCell CycleCell Cycle ProteinsCheckpoint Kinase 2DNADNA DamageDNA PrimaseDNA ReplicationEnzyme StabilityFlow CytometryFungal ProteinsGene Expression Regulation, FungalGenes, FungalInterphaseMethyl MethanesulfonateMitosisModels, BiologicalMutagenesis, Site-DirectedMutagensMutationPhosphorylationProtein KinasesProtein Serine-Threonine KinasesRNA NucleotidyltransferasesS PhaseSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsTemperatureUltraviolet RaysConceptsDNA damage responseDNA replicationDamage responseDNA damageDNA primaseS-phase progressionSignal transduction pathwaysDNA-damaging agentsCell cycle progressionCell cycle delayG1-S transitionRad53p phosphorylationTransduction pathwaysCheckpoint pathwayCycle progressionCycle delayPhase progressionEarly stepsEssential rolePrimaseReplicationPathwayMitosisPhosphorylationOverexpression
1996
Spk1/Rad53 is regulated by Mec1-dependent protein phosphorylation in DNA replication and damage checkpoint pathways.
Sun Z, Fay DS, Marini F, Foiani M, Stern DF. Spk1/Rad53 is regulated by Mec1-dependent protein phosphorylation in DNA replication and damage checkpoint pathways. Genes & Development 1996, 10: 395-406. PMID: 8600024, DOI: 10.1101/gad.10.4.395.Peer-Reviewed Original ResearchMeSH KeywordsAlkaline PhosphataseCell CycleCell Cycle ProteinsCell DivisionCheckpoint Kinase 2DNA DamageDNA ReplicationDNA, FungalFungal ProteinsGene Expression Regulation, FungalGenes, FungalHydroxyureaImmunoblottingIntracellular Signaling Peptides and ProteinsMethyl MethanesulfonateMutagenesisPhosphorylationPrecipitin TestsProtein KinasesProtein Serine-Threonine KinasesSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsSignal TransductionTemperatureConceptsProtein kinaseCheckpoint pathwayEssential protein kinaseDamage checkpoint pathwayDamage-induced phosphorylationKinase-defective formG1/S boundarySignal transduction pathwaysRegulation of phosphorylationTreatment of cellsCheckpoint functionCdc mutantsDNA replicationProtein phosphorylationUpstream kinaseCheckpoint arrestRegulated phosphorylationTransduction pathwaysKinase activityCell cyclePhosphorylationS boundaryDamage DNACycle arrestKinase