- EMDB-14448: Structure of yeast RNA Polymerase III Elongation Complex (EC) -
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Basic information
Entry
Database: EMDB / ID: EMD-14448
Title
Structure of yeast RNA Polymerase III Elongation Complex (EC)
Map data
Map B, Pol III EC sharpened with Local Deblur
Sample
Complex: Yeast RNA Polymerase III EC
Protein or peptide: x 17 types
RNA: x 1 types
Other: x 2 types
Ligand: x 3 types
Function / homology
Function and homology information
RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening ...RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA Polymerase II Pre-transcription Events / RNA-templated transcription / Formation of TC-NER Pre-Incision Complex / termination of RNA polymerase III transcription / RNA Polymerase I Promoter Escape / termination of RNA polymerase I transcription / transcription initiation at RNA polymerase III promoter / nucleolar large rRNA transcription by RNA polymerase I / Gap-filling DNA repair synthesis and ligation in TC-NER / transcription initiation at RNA polymerase I promoter / Estrogen-dependent gene expression / transcription by RNA polymerase I / transcription by RNA polymerase III / Dual incision in TC-NER / RNA polymerase I complex / tRNA transcription by RNA polymerase III / RNA polymerase III complex / transcription elongation by RNA polymerase I / RNA polymerase II, core complex / : / nucleotidyltransferase activity / DNA-directed RNA polymerase activity / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / ribonucleoside binding / : / : / : / : / : / : / DNA-directed RNA polymerase / peroxisome / ribosome biogenesis / single-stranded DNA binding / transcription by RNA polymerase II / nucleic acid binding / protein dimerization activity / nucleotide binding / nucleolus / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytosol / cytoplasm Similarity search - Function
DNA-directed RNA polymerase III subunit RPC1 / DNA-directed RNA polymerases I and III subunit RPAC1 / DNA-directed RNA polymerase III subunit RPC7 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerase III subunit RPC2 / DNA-directed RNA polymerase III subunit RPC4 / DNA-directed RNA polymerases I and III subunit RPAC2 ...DNA-directed RNA polymerase III subunit RPC1 / DNA-directed RNA polymerases I and III subunit RPAC1 / DNA-directed RNA polymerase III subunit RPC7 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerase III subunit RPC2 / DNA-directed RNA polymerase III subunit RPC4 / DNA-directed RNA polymerases I and III subunit RPAC2 / DNA-directed RNA polymerase III subunit RPC3 / DNA-directed RNA polymerase III subunit RPC6 / DNA-directed RNA polymerase III subunit RPC8 / DNA-directed RNA polymerase III subunit RPC5 / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / DNA-directed RNA polymerase III subunit RPC9 / DNA-directed RNA polymerase III subunit RPC10 Similarity search - Component
Journal: Cell Rep / Year: 2022 Title: Architecture of the yeast Pol III pre-termination complex and pausing mechanism on poly(dT) termination signals. Authors: Mathias Girbig / Juanjuan Xie / Helga Grötsch / Domenico Libri / Odil Porrua / Christoph W Müller / Abstract: RNA polymerase (Pol) III is specialized to transcribe short, abundant RNAs, for which it terminates transcription on polythymine (dT) stretches on the non-template (NT) strand. When Pol III reaches ...RNA polymerase (Pol) III is specialized to transcribe short, abundant RNAs, for which it terminates transcription on polythymine (dT) stretches on the non-template (NT) strand. When Pol III reaches the termination signal, it pauses and forms the pre-termination complex (PTC). Here, we report cryoelectron microscopy (cryo-EM) structures of the yeast Pol III PTC and complementary functional states at resolutions of 2.7-3.9 Å. Pol III recognizes the poly(dT) termination signal with subunit C128 that forms a hydrogen-bond network with the NT strand and, thereby, induces pausing. Mutating key interacting residues interferes with transcription termination in vitro, impairs yeast growth, and causes global termination defects in vivo, confirming our structural results. Additional cryo-EM analysis reveals that C53-C37, a Pol III subcomplex and key termination factor, participates indirectly in Pol III termination. We propose a mechanistic model of Pol III transcription termination and rationalize why Pol III, unlike Pol I and Pol II, terminates on poly(dT) signals.
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