Selective inhibition of human translation termination by a drug-like compound
Journal Article
·
· Nature Communications
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); OSTI
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Methods to directly inhibit gene expression using small molecules hold promise for the development of new therapeutics targeting proteins that have evaded previous attempts at drug discovery. Among these, small molecules including the drug-like compound PF-06446846 (PF846) selectively inhibit the synthesis of specific proteins, by stalling translation elongation. These molecules also inhibit translation termination by an unknown mechanism. Using cryo-electron microscopy (cryo-EM) and biochemical approaches, we show that PF846 inhibits translation termination by arresting the nascent chain (NC) in the ribosome exit tunnel. The arrested NC adopts a compact α-helical conformation that induces 28 S rRNA nucleotide rearrangements that suppress the peptidyl transferase center (PTC) catalytic activity stimulated by eukaryotic release factor 1 (eRF1). These data support a mechanism of action for a small molecule targeting translation that suppresses peptidyl-tRNA hydrolysis promoted by eRF1, revealing principles of eukaryotic translation termination and laying the foundation for new therapeutic strategies.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- National Institutes of Health (NIH); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1815982
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Insights into the molecular mechanism of translation inhibition by the ribosome-targeting antibiotic thermorubin
Madumycin II inhibits peptide bond formation by forcing the peptidyl transferase center into an inactive state
Selective stalling of human translation through small-molecule engagement of the ribosome nascent chain
Journal Article
·
Wed Dec 21 19:00:00 EST 2022
· Nucleic Acids Research
·
OSTI ID:2423484
Madumycin II inhibits peptide bond formation by forcing the peptidyl transferase center into an inactive state
Journal Article
·
Fri May 12 20:00:00 EDT 2017
· Nucleic Acids Research
·
OSTI ID:1373788
Selective stalling of human translation through small-molecule engagement of the ribosome nascent chain
Journal Article
·
Mon Mar 20 20:00:00 EDT 2017
· PLoS Biology (Online)
·
OSTI ID:1627175