T-complex protein 1 subunit alpha (TCP1)

T-complex protein 1 subunit alpha (TCP1) is a molecular chaperone that forms one of the eight distinct subunits of the eukaryotic cytosolic chaperonin-containing TCP1 complex (CCT; also known as the TCP1 ring complex, TRiC)[1][2][4][6]. The TRiC complex features two stacked rings, each composed of eight different CCT subunits, including TCP1, and acts as a folding chamber powered by ATP hydrolysis[1][4]. TCP1/CCT1 is required for proper folding of essential cytoskeletal proteins such as actin and tubulin, as well as for the maturation of many other proteins critical for cell cycle progression, proliferation, and maintenance of cellular structure and signaling[2][5]. CCT/TRiC subunits, including TCP1, have been found upregulated in a variety of tumor types, with dysregulation linked to cancer pathogenesis and poor prognosis[2][7]. The complex is also implicated in other diseases where proteostasis is disrupted, such as certain neurodegenerative disorders. TCP1 is essential for viability in mammals, with knockout or disruption leading to impaired folding of client proteins and cellular dysfunction[1][2][5][10].

Other names

T-complex 1CCT1CCT-alphaCCTaCCT-αTCP-1-alphac-cpn

Drugs or molecules modulating TCP1/CCT1 function act via disruption of chaperone-mediated folding, affecting client proteins essential for tumor cell proliferation and survival[7][2].