Featured Publications
Ubiquitination of ATF6 by disease-associated RNF186 promotes the innate receptor-induced unfolded protein response
Ranjan K, Hedl M, Sinha S, Zhang X, Abraham C. Ubiquitination of ATF6 by disease-associated RNF186 promotes the innate receptor-induced unfolded protein response. Journal Of Clinical Investigation 2021, 131: e145472. PMID: 34623328, PMCID: PMC8409591, DOI: 10.1172/jci145472.Peer-Reviewed Original ResearchMeSH KeywordsActivating Transcription Factor 6AnimalsEndoplasmic Reticulum StressGenetic VariationHost Microbial InteractionsHumansImmunity, InnateInflammatory Bowel DiseasesMacrophagesMiceMice, Inbred C57BLMice, KnockoutNod2 Signaling Adaptor ProteinReceptors, Pattern RecognitionRisk FactorsSignal TransductionUbiquitinationUbiquitin-Protein LigasesUnfolded Protein ResponseConceptsPattern recognition receptorsUnfolded protein responseInflammatory bowel diseaseER stress sensorsHuman macrophagesIntestinal immune homeostasisProtein responseInnate immune systemRisk variantsKey macrophage functionsBowel diseaseOral challengeTranscription factor 6Immune homeostasisCytokine secretionColonic tissueMacrophage functionStress sensorImmune systemRecognition receptorsEffective clearanceMicrobial responsesWeight lossMacrophagesUbiquitinationThe E3 ubiquitin ligase RNF186 and RNF186 risk variants regulate innate receptor-induced outcomes
Ranjan K, Hedl M, Abraham C. The E3 ubiquitin ligase RNF186 and RNF186 risk variants regulate innate receptor-induced outcomes. Proceedings Of The National Academy Of Sciences Of The United States Of America 2021, 118: e2013500118. PMID: 34353900, PMCID: PMC8364215, DOI: 10.1073/pnas.2013500118.Peer-Reviewed Original ResearchMeSH KeywordsCytokinesHumansImmunity, InnateInflammatory Bowel DiseasesIntestinesMacrophagesMyeloid CellsNF-kappa BNod2 Signaling Adaptor ProteinPolymorphism, Single NucleotideReceptor-Interacting Protein Serine-Threonine Kinase 2Receptors, Pattern RecognitionToll-Like Receptor 2Toll-Like Receptor 4UbiquitinationUbiquitin-Protein LigasesConceptsPattern recognition receptorsE3 ubiquitin ligase activityStimulation of PRRsAntimicrobial reactive oxygen speciesMultiple pattern recognition receptorsLoss of functionLigase activityReactive nitrogen speciesComplex assemblyIntestinal myeloid cellsReactive oxygen speciesAutophagy pathwayDownstream signalingRNF186Bacterial clearanceRisk variantsRecognition receptorsHuman macrophagesOxygen speciesInnate immunityInflammatory bowel diseaseNitrogen speciesMicrobial clearanceSpeciesMyeloid cellsLACC1 Required for NOD2-Induced, ER Stress-Mediated Innate Immune Outcomes in Human Macrophages and LACC1 Risk Variants Modulate These Outcomes
Huang C, Hedl M, Ranjan K, Abraham C. LACC1 Required for NOD2-Induced, ER Stress-Mediated Innate Immune Outcomes in Human Macrophages and LACC1 Risk Variants Modulate These Outcomes. Cell Reports 2019, 29: 4525-4539.e4. PMID: 31875558, PMCID: PMC7372507, DOI: 10.1016/j.celrep.2019.11.105.Peer-Reviewed Original ResearchMeSH KeywordsActivating Transcription Factor 6EIF-2 KinaseEndoplasmic ReticulumEndoplasmic Reticulum StressEndoribonucleasesEnterococcus faecalisEscherichia coliGene Expression RegulationHeLa CellsHost-Pathogen InteractionsHumansImmunity, InnateIntracellular Signaling Peptides and ProteinsMacrophagesNod2 Signaling Adaptor ProteinPhagocytosisPrimary Cell CultureProtein Serine-Threonine KinasesRiskSignal TransductionConceptsEndoplasmic reticulumER stressER stress sensorsHuman macrophagesInnate immune outcomesDisease risk variantsMultiple immune-mediated diseasesLaccase domainPattern recognition receptor NOD2HeLa cellsAntimicrobial pathwaysRisk variantsGenetic variantsLACC1Critical roleVariantsMacrophagesATF6IRE1αArg284SignalingReticulumStressTransfectionPERK
2017
Hydrophilic Acylated Surface Protein A (HASPA) of Leishmania donovani: Expression, Purification and Biophysico-Chemical Characterization
Kumar M, Ranjan K, Singh V, Pathak C, Pappachan A, Singh DD. Hydrophilic Acylated Surface Protein A (HASPA) of Leishmania donovani: Expression, Purification and Biophysico-Chemical Characterization. The Protein Journal 2017, 36: 343-351. PMID: 28634775, DOI: 10.1007/s10930-017-9726-x.Peer-Reviewed Original ResearchConceptsMouse macrophage RAW264.7 cell lineRAW264.7 cell lineSurface protein AMacrophage RAW264.7 cell lineReactive oxygen species productionSurface proteinsOxygen species productionLeishmania parasitesLeishmania donovaniLeishmania proteinsDrug developmentSpecies productionCell linesCo-immunoprecipitation studiesPresent studyInfective stagesFurther researchProtein AMacrophage protein