A protein or a member of a complex that interacts specifically and non-covalently with a DNA-binding transcription factor to activate the transcription of specific genes. Coregulators often act by altering chromatin structure and modifications. The Mediator complex, which bridges transcription factors and RNA polymerase, is also a transcription coactivator.
Taxonomy/Path:
GO : positive regulation of nucleic acid-templated transcription / transcription coactivator activity