Abstract
We have produced a cell line which lacks the protein tyrosine kinase JAK1 and is completely defective in interferon response. Complementation of this mutant with JAK1 restored the response, establishing the requirement for JAK1 in both the interferon-alpha/beta and -gamma signal transduction pathways. The reciprocal interdependence between JAK1 and Tyk2 activities in the interferon-alpha pathway, and between JAK1 and JAK2 in the interferon-gamma pathway, may reflect a requirement for these kinases in the correct assembly of interferon receptor complexes.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Cell Line
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DNA-Binding Proteins / metabolism
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Genetic Complementation Test
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Humans
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Interferon-Stimulated Gene Factor 3
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Interferon-Stimulated Gene Factor 3, gamma Subunit
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Interferon-alpha / metabolism*
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Interferon-beta / metabolism*
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Interferon-gamma / metabolism*
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Janus Kinase 1
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Janus Kinase 2
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Mice
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Mutation
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Phosphorylation
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Protein-Tyrosine Kinases / genetics
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Protein-Tyrosine Kinases / metabolism*
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Proteins / metabolism
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Proto-Oncogene Proteins*
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STAT1 Transcription Factor
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Signal Transduction*
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TYK2 Kinase
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Trans-Activators*
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Transcription Factors / metabolism
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Transcription, Genetic
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Tyrosine / metabolism
Substances
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DNA-Binding Proteins
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IRF9 protein, human
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Interferon-Stimulated Gene Factor 3
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Interferon-Stimulated Gene Factor 3, gamma Subunit
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Interferon-alpha
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Isgf3g protein, mouse
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Proteins
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Proto-Oncogene Proteins
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STAT1 Transcription Factor
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STAT1 protein, human
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Stat1 protein, mouse
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Trans-Activators
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Transcription Factors
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Tyrosine
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Interferon-beta
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Interferon-gamma
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Protein-Tyrosine Kinases
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JAK1 protein, human
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JAK2 protein, human
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Jak1 protein, mouse
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Jak2 protein, mouse
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Janus Kinase 1
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Janus Kinase 2
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TYK2 Kinase
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TYK2 protein, human
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Tyk2 protein, mouse