Electrophilic activity-based RNA probes reveal a self-alkylating RNA for RNA labeling.
Nat Chem Biol
; 10(12): 1049-54, 2014 Dec.
Article
in En
| MEDLINE
| ID: mdl-25306441
ABSTRACT
Probes that form covalent bonds with RNA molecules on the basis of their chemical reactivity would advance our ability to study the transcriptome. We developed a set of electrophilic activity-based RNA probes designed to react with unusually nucleophilic RNAs. We used these probes to identify reactive genome-encoded RNAs, resulting in the discovery of a 42-nt catalytic RNA from an archaebacterium that reacts with a 2,3-disubstituted epoxide at N7 of a specific guanosine. Detailed characterization of the catalytic RNA revealed the structural requirements for reactivity. We developed this catalytic RNA into a general tool to selectively conjugate a small molecule to an RNA of interest. This strategy enabled up to 500-fold enrichment of target RNA from total mammalian RNA or from cell lysate. We demonstrated the utility of this approach by selectively capturing proteins in yeast cell lysate that bind the ASH1 mRNA.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Staining and Labeling
/
RNA, Messenger
/
RNA Probes
/
RNA, Catalytic
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Nat Chem Biol
Journal subject:
BIOLOGIA
/
QUIMICA
Year:
2014
Document type:
Article
Affiliation country:
United States