2002
Coexpression of Wild-Type Tyrosinase Enhances Maturation of Temperature-Sensitive Tyrosinase Mutants
Halaban R, Cheng E, Hebert DN. Coexpression of Wild-Type Tyrosinase Enhances Maturation of Temperature-Sensitive Tyrosinase Mutants. Journal Of Investigative Dermatology 2002, 119: 481-488. PMID: 12190874, DOI: 10.1046/j.1523-1747.2002.01824.x.Peer-Reviewed Original ResearchConceptsWild-type proteinTyrosinase mutantsMutant proteinsGlycosylation-deficient mutantsGlycosylation-deficient formsOculocutaneous albinism 1Wild-type tyrosinaseDevelopment of pigmentsDifferent mutant allelesType I membraneActivity-dependent mannerNonpermissive temperatureMutant allelesEndoplasmic reticulumTypes of mutationsMutantsFunction mutationsCarbohydrate processingMelanin synthesisProteinCoexpressionMelanocytesTyrosinase activityMutationsMaturationCOMMENTARY Pigmentation in Melanomas: Changes Manifesting Underlying Oncogenic and Metabolic Activities
Halaban R. COMMENTARY Pigmentation in Melanomas: Changes Manifesting Underlying Oncogenic and Metabolic Activities. Oncology Research Featuring Preclinical And Clinical Cancer Therapeutics 2002, 13: 3-8. PMID: 12201672, DOI: 10.3727/096504002108747908.Peer-Reviewed Original ResearchConceptsMelanocyte-specific gene expressionTranscription factor MITFDownregulation of tyrosinaseEpigenetic levelV-ATPaseRate-limiting enzymeTranscriptional activityGene expressionAcidified microenvironmentsAmelanotic melanoma cellsC-MycActivity of tyrosinaseEnhanced glycolysisMelanin synthesisExtracellular acidificationMelanoma tumorsTYR activityMelanoma cellsMetabolic activityPigmentationAnaerobic conditionsTyrosinase activityMetastatic melanocytic lesionsMetabolic changesTyrosinase
1997
Aberrant retention of tyrosinase in the endoplasmic reticulum mediates accelerated degradation of the enzyme and contributes to the dedifferentiated phenotype of amelanotic melanoma cells
Halaban R, Cheng E, Zhang Y, Moellmann G, Hanlon D, Michalak M, Setaluri V, Hebert D. Aberrant retention of tyrosinase in the endoplasmic reticulum mediates accelerated degradation of the enzyme and contributes to the dedifferentiated phenotype of amelanotic melanoma cells. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 6210-6215. PMID: 9177196, PMCID: PMC21028, DOI: 10.1073/pnas.94.12.6210.Peer-Reviewed Original ResearchMeSH KeywordsAdultCalcium-Binding ProteinsCalnexinCalreticulinCell DifferentiationCells, CulturedCoculture TechniquesEndoplasmic ReticulumEnzyme PrecursorsHumansInfant, NewbornKineticsMelanocytesMelanomaMolecular ChaperonesMolecular WeightMonophenol MonooxygenasePhenotypeRibonucleoproteinsSkin NeoplasmsTime FactorsTumor Cells, CulturedConceptsEndoplasmic reticulumNormal melanocytesER chaperone calnexinMelanin synthesisMalignant melanocytesMelanoma cellsChaperone bindingAberrant retentionChaperone calnexinGolgi compartmentSubcellular localizationAmelanotic melanoma cell lineKey enzymeMelanoma cell linesMaturation of tyrosinaseAmelanotic melanoma cellsKinetics of synthesisInhibitor sensitivityDedifferentiated phenotypeProteolytic degradationCell linesProteasome inhibitorsEnzymeProteasomeImmature forms