Class D basic helix-loop-helix protein 2 ; bHLHd2 ; Sterol regulatory element-binding transcription factor 2 ; BHLHD2 ; SREBP2
Categories
Elisa
Function
Transcriptional activator required for lipid homeostasis. Regulates transcription of the LDL receptor gene as well as the cholesterol and to a lesser degree the fatty acid synthesis pathway (By similarity). Binds the sterol regulatory element 1 (SRE-1) (5'-ATCACCCCAC-3') found in the flanking region of the LDRL and HMG-CoA synthase genes.
Specificity
Natural and recombinant Human Sterol regulatory element-binding protein 2
Subcellular Location
Processed sterol regulatory element-binding protein 2 Nucleus
Forms a tight complex with SCAP in the ER membrane. Efficient DNA binding of the soluble transcription factor fragment requires dimerization with another bHLH protein. Interacts with LMNA. Component of SCAP/SREBP complex composed of SREBF2, SCAP and RNF139; the complex hampers the interaction between SCAP and SEC24B, thereby reducing SREBF2 proteolytic processing. Interacts (via C-terminus domain) with RNF139.