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Mxi1 | Max-interacting protein 1; Transcriptional repressor. MXI1 binds with MAX to form a sequence-specific DNA-binding protein complex which recognizes the core sequence 5'-CAC[GA]TG-3'. MXI1 thus antagonizes MYC transcriptional activity by competing for MAX. Isoform Short, which lacks a segment, has a much stronger suppressive potential and associates with a SIN3 homologous protein. (295 aa) | ||||
Fbxl20 | F-box/LRR-repeat protein 20; Substrate-recognition component of the SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. Isoform 3 regulates neural transmission by binding and ubiquitinating RIMS1, a modulator of presynaptic plasticity. (436 aa) |