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Transducer of regulated CREB activity, N terminus This family includes the N terminal region of TORC proteins. TORC (Transducer of regulated CREB activity) is a protein family of coactivators that enhances the activity of CRE-depended transcription via a phosphorylation-independent interaction with the bZIP DNA binding/dimerization domain of CREB (cAMP Response Element-Binding). The proteins display a highly conserved predicted N-terminal coiled-coil domain and an invariant sequence matching a protein kinase A (PKA) phosphorylation consensus sequence (RKXS). The coiled-coil structure interacts with the bZIP domain of CREB. This interaction may occur via ionic bonds because it is disrupted under high-salt conditions. In addition to CREB-binding, the N-terminal region plays a role in the tetramer formation of TORCs, but the physiological function of the multimeric complex has not been clarified yet. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",