E. coli methyltransferase RsmB acts as chaperone in ribosome assembly
Start here
New research shows that the E. coli methyltransferase RsmB helps assemble the 30S ribosomal subunit through chaperone activity, coordinating the recruitment of ribosomal proteins. The finding reframes the enzyme's role beyond its catalytic function: real-time single-molecule assembly experiments show that its methylation product, 16S m5C967, has only a limited effect on the affinity of the 16S rRNA 3'-terminal domain for ribosomal proteins. This suggests the protein's physical chaperone action, rather than the methyl mark it deposits, drives much of its effect on assembly. The work, published in Science Advances on October 21, 2026, clarifies a step in bacterial ribosome biogenesis, though the precise mechanism by which RsmB recruits ribosomal proteins remains to be worked out.
Written by a model from the reports · updated 3 hours ago
Coverage timeline
Follow the coverage to see the different angles.
- Science AdvancesPickMethyltransferase RsmB chaperones E. coli ribosome assembly by orchestrating the recruitment of ribosomal proteins.
The E. coli methyltransferase RsmB coordinates 30S subunit assembly through its chaperone activity. Real-time single-molecule assembly experiments show that its product, 16S m5C967, has limited effect on the affinity of the 3'-terminal domain of 16S rRNA for ribosomal proteins.
Coverage and heat for this story
Reports so far 1·Heat now 7·Peak heat 10 (Oct 21 00:00)·Reports, 24h +1
Two panels, same clock (pointer stays in sync): top is cumulative editorial reports — only rises; last point = All reports; slope = new reports that hour. Bottom is Live-board heatIndex — 7-day participants with a 24-hour half-life, so it can fall when talk cools.