Crystal structure of Pistol, a class of self-cleaving ribozyme
Journal Article
·
· Proceedings of the National Academy of Sciences of the United States of America
- Yale Univ., New Haven, CT (United States)
- Yale Univ., New Haven, CT (United States). Howard Hughes Medical Inst. and Dept. of Chemistry
Small self-cleaving ribozymes have been discovered in all evolutionary domains of life. They can catalyze site-specific RNA cleavage, and as a result, they have relevance in gene regulation. Comparative genomic analysis has led to the discovery of a new class of small self-cleaving ribozymes named Pistol. We report herein the crystal structure of Pistol at 2.97-Å resolution. Our results suggest that the Pistol ribozyme self-cleavage mechanism likely uses a guanine base in the active site pocket to carry out the phosphoester transfer reaction. The guanine G40 is in close proximity to serve as the general base for activating the nucleophile by deprotonating the 2'-hydroxyl to initiate the reaction (phosphoester transfer). Furthermore, G40 can also establish hydrogen bonding interactions with the nonbridging oxygen of the scissile phosphate. The proximity of G32 to the O5' leaving group suggests that G32 may putatively serve as the general acid. The RNA structure of Pistol also contains A-minor interactions, which seem to be important to maintain its tertiary structure and compact fold. Our findings expand the repertoire of ribozyme structures and highlight the conserved evolutionary mechanism used by ribozymes for catalysis.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- Howard Hughes Medical Institute; National Institutes of Health (NIH); USDOE
- OSTI ID:
- 1343147
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 5 Vol. 114; ISSN 0027-8424
- Publisher:
- National Academy of SciencesCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Crucial Roles of Two Hydrated Mg2+ Ions in Reaction Catalysis of the Pistol Ribozyme
Hatchet ribozyme structure and implications for cleavage mechanism
Two Divalent Metal Ions and Conformational Changes Play Roles in the Hammerhead Ribozyme Cleavage Reaction
Journal Article
·
Wed Dec 04 19:00:00 EST 2019
· Angewandte Chemie (International Edition)
·
OSTI ID:1598035
Hatchet ribozyme structure and implications for cleavage mechanism
Journal Article
·
Mon May 13 20:00:00 EDT 2019
· Proceedings of the National Academy of Sciences of the United States of America
·
OSTI ID:1531009
Two Divalent Metal Ions and Conformational Changes Play Roles in the Hammerhead Ribozyme Cleavage Reaction
Journal Article
·
Tue Sep 22 20:00:00 EDT 2015
· Biochemistry
·
OSTI ID:1225075