I have three proteins and I want to find out do they share same transcription factors are not?

I do not know which transcription factors may bind with them and even transcription factor binding sites (TFBSs) are also not known. I tried to tail down the answer through different available tools including INSECT, JASPER, DBD but no tool has answered question.

Is there any tool which can predict Transcription Factors of given proteins (Transcription Factor Binding Sites is of less priority) and also describe whether given proteins may share similar Transcription Factors?

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