Regulator of pre-B-cell leukemia transcription factors (BPXs) function. Inhibits the binding of PBX1-HOX complex to DNA and blocks the transcriptional activity of E2A-PBX1. Tethers estrogen receptor-alpha (ESR1) to microtubules and allows them to influence estrogen receptors-alpha signaling.
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Hematopoietic PBX-interacting protein; HPIP; pre-B-cell leukemia homeobox interacting protein 1; Pre-B-cell leukemia transcription factor-interacting protein 1