ArticleMolecular cell2026
Structural basis for multi-subunit DNA-dependent RNA polymerase catalytic activity.
Article in Molecular cell, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Structural basis of transcription of the hachimoji eight-letter alphabet by E. coli RNA polymerase.Nature communications · 2026Article
- Mutations in RNA polymerase that drive the emergence of antibiotic resistance.Current opinion in microbiology · 2026Review
- RNA polymerase inhibitors reveal active-site motions essential for the nucleotide addition cycle.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
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2 authors.
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Abstract
Multi-subunit DNA-dependent RNA polymerase (RNAP) is the central enzyme of transcription, yet its catalytic mechanism remains obscure because high-resolution structures of intermediates with native substrates are not available. We visualized E. coli RNAP on a promoter DNA template with nucleoside triphosphate substrates engaged in active RNA synthesis by cryo-electron microscopy. From this heterogeneous mixture, we determined five high-resolution structures of initial transcribing complexes, including a true Michaelis complex (MC) and a post-catalytic product complex (PC). The MC reveals key conformational transitions during catalysis. Waters in the MC and PC structures show striking overlap with those in corresponding S. cerevisiae RNA polymerase II (RNAPII) structures (see related paper by Li et al.), pointing to functional importance. Together, these results establish that RNAP catalyzes nucleotidyl transfer through a positional (entropic) mechanism, revealing structural determinants of the first step of gene expression.
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