Component of the TSC-TBC complex, that contains tbc1d7 in addition to the TSC1-TSC2 complex and consists of the functional complex possessing GTPase-activating protein (GAP) activity toward rheb in response to alterations in specific cellular growth conditions. The small GTPase rheb is a direct activator of the protein kinase activity of mTORC1 and the TSC-TBC complex acts as a negative regulator of mTORC1 signaling cascade by acting as a GAP for RHEB (By similarity). Component of the TSC-TBC complex (also named Rhebulator complex).