Enhances transcription from various types of promoters. Regulatory protein that interferes with the assembly of the SCF (SKP1-CUL1-F-box protein) ubiquitin ligase complex and thereby down-regulates ubiquitination of target proteins. Prevents neddylation of CUL1 by physically blocking access to the neddylation site. Disrupts interactions between CUL1 and SKP1 and between CUL1 and F-box proteins. Binds TBP. Part of a complex that contains CUL1 and RBX1. Binds unneddylated CUL1, but cannot bind CUL1 once it has been neddylated. Binds CUL2, CUL3, CUL4A, CUL4B and CUL5. Belongs to the CAND family. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Ubiquitin conjugating system; Transcription factor
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.