Download MendeleyCrystal Structure of the Human Ribosome in Complex with DENR-MCT-1.
Lomakin, I.B., Stolboushkina, E.A., Vaidya, A.T., Zhao, C., Garber, M.B., Dmitriev, S.E., Steitz, T.A.(2017) Cell Rep 20: 521-528
- PubMed: 28723557
- DOI: https://doi.org/10.1016/j.celrep.2017.06.025
- Primary Citation of Related Structures:
5VYC - PubMed Abstract:
The repertoire of the density-regulated protein (DENR) and the malignant T cell-amplified sequence 1 (MCT-1/MCTS1) oncoprotein was recently expanded to include translational control of a specific set of cancer-related mRNAs. DENR and MCT-1 form the heterodimer, which binds to the ribosome and operates at both translation initiation and reinitiation steps, though by a mechanism that is yet unclear. Here, we determined the crystal structure of the human small ribosomal subunit in complex with DENR-MCT-1. The structure reveals the location of the DENR-MCT-1 dimer bound to the small ribosomal subunit. The binding site of the C-terminal domain of DENR on the ribosome has a striking similarity with those of canonical initiation factor 1 (eIF1), which controls the fidelity of translation initiation and scanning. Our findings elucidate how the DENR-MCT-1 dimer interacts with the ribosome and have functional implications for the mechanism of unconventional translation initiation and reinitiation.
Organizational Affiliation:
Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114, USA. Electronic address: ivan.lomakin@yale.edu.
