Medical Dictionary

coactivator

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noun co·ac·ti·va·tor \(ˈ)kō-ˈak-tə-ˌvā-tər\

Medical Definition of coactivator

  1. :  a protein or protein complex that activates genetic transcription usually by binding to a transcription factor Gene-regulatory proteins that do not themselves bind DNA but assemble on DNA-bound gene regulatory proteins are often termed coactivators or corepressors, depending on their effect on transcription initiation.—Bruce Alberts et al., Molecular Biology of the Cell, 2002


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