homomeric SMAD protein complex
A protein complex composed of a single type of SMAD family proteins. In the absence of Smad4, phosphorylation of R-SMADs results in their homotrimerization. However, these complexes do not appear to import into the nucleus and are assumed to be transcriptionally inactive.
GO:0071141
SMAD protein complex
is_a
GO:0005737
cytoplasm
part_of
SMAD1 homotrimer complex
narrow
SMAD1 protein complex
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SMAD2 homotrimer complex
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SMAD2 protein complex
narrow
SMAD3 homotrimer complex
narrow
SMAD3 protein complex
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