snRNA-activating protein complex / snRNA transcription / transcription preinitiation complex assembly / snRNA transcription by RNA polymerase III / bent DNA binding / RNA polymerase III preinitiation complex assembly / RNA Polymerase III Chain Elongation / TFIIIC-class transcription factor complex binding / transcription factor TFIIIB complex / RNA Polymerase III Transcription Termination ...snRNA-activating protein complex / snRNA transcription / transcription preinitiation complex assembly / snRNA transcription by RNA polymerase III / bent DNA binding / RNA polymerase III preinitiation complex assembly / RNA Polymerase III Chain Elongation / TFIIIC-class transcription factor complex binding / transcription factor TFIIIB complex / RNA Polymerase III Transcription Termination / calcitonin gene-related peptide receptor activity / DNA/RNA hybrid binding / RNA polymerase III type 3 promoter sequence-specific DNA binding / RNA polymerase transcription factor SL1 complex / snRNA transcription by RNA polymerase II / regulation of transcription by RNA polymerase I / regulation of transcription by RNA polymerase III / RNA polymerase III general transcription initiation factor activity / RNA polymerase I core promoter sequence-specific DNA binding / RPAP3/R2TP/prefoldin-like complex / DNA polymerase III complex / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Polymerase III Transcription Initiation From Type 3 Promoter / Cytosolic sensors of pathogen-associated DNA / transcription factor TFIIA complex / female germ cell nucleus / RNA Polymerase III Abortive And Retractive Initiation / male pronucleus / positive regulation of innate immune response / female pronucleus / RNA polymerase II general transcription initiation factor binding / nucleobase-containing compound metabolic process / Abortive elongation of HIV-1 transcript in the absence of Tat / FGFR2 alternative splicing / RNA Polymerase I Transcription Termination / transcription preinitiation complex / MicroRNA (miRNA) biogenesis / Viral Messenger RNA Synthesis / Signaling by FGFR2 IIIa TM / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / HIV Transcription Initiation / RNA Polymerase II HIV Promoter Escape / Transcription of the HIV genome / 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 / transcription initiation at RNA polymerase III promoter / mRNA Splicing - Minor Pathway / PIWI-interacting RNA (piRNA) biogenesis / aryl hydrocarbon receptor binding / TFIIB-class transcription factor binding / RNA Polymerase I Transcription Initiation / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / Processing of Capped Intron-Containing Pre-mRNA / RNA polymerase II transcribes snRNA genes / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / positive regulation of transcription initiation by RNA polymerase II / neuropeptide signaling pathway / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / transcription by RNA polymerase III / transcription by RNA polymerase I / RNA polymerase I complex / transcription elongation by RNA polymerase I / Formation of HIV elongation complex in the absence of HIV Tat / RNA polymerase III complex / core promoter sequence-specific DNA binding / RNA polymerase II core promoter sequence-specific DNA binding / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / RNA polymerase II preinitiation complex assembly / RNA Polymerase II Transcription Elongation / : / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / TBP-class protein binding / DNA-directed RNA polymerase activity / Inhibition of DNA recombination at telomere / mRNA Splicing - Major Pathway / positive regulation of interferon-beta production / male germ cell nucleus / acrosomal vesicle / SIRT1 negatively regulates rRNA expression / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / RNA Polymerase I Promoter Escape / DNA-templated transcription initiation / Transcriptional regulation by small RNAs / mRNA transcription by RNA polymerase II / euchromatin 類似検索 - 分子機能
snRNA-activating protein complex subunit 1 / snRNA-activating protein complex, subunit 3 / Small nuclear RNA activating complex (SNAPc), subunit 1 / snRNA-activating protein complex (SNAPc), subunit 3 / : / : / BRF2-like, C-terminal cyclin repeat / Transcription factor TFIIIB component B'', Myb domain / Myb DNA-binding like / DNA-directed RNA polymerase III subunit RPC5, C-terminal ...snRNA-activating protein complex subunit 1 / snRNA-activating protein complex, subunit 3 / Small nuclear RNA activating complex (SNAPc), subunit 1 / snRNA-activating protein complex (SNAPc), subunit 3 / : / : / BRF2-like, C-terminal cyclin repeat / Transcription factor TFIIIB component B'', Myb domain / Myb DNA-binding like / DNA-directed RNA polymerase III subunit RPC5, C-terminal / DNA-directed RNA polymerase III subunit RPC5 C-terminal / DNA-directed RNA polymerase III subunit RPC4 / RNA polymerase III RPC4 / DNA-directed RNA polymerase III, subunit Rpc31 / DNA-directed RNA polymerase III subunit Rpc31 / Pol III subunit C11, C-terminal zinc ribbon / DNA-directed RNA polymerase III subunit Rpc5 / : / DNA-directed RNA polymerase III subunit RPC1, N-terminal / DNA-directed RNA polymerase III subunit RPC1, C-terminal / RPC5 protein / RNA polymerase III, subunit Rpc25 / DNA-directed RNA polymerase III subunit RPC9 / RNA polymerase III subunit Rpc25 / RNA polymerase Rpc34 / RNA polymerase III Rpc82, C -terminal / RNA polymerase Rpc34-like / DNA-directed RNA polymerase III subunit RPC3 / : / RNA polymerase Rpc34 subunit / RNA polymerase III subunit RPC82 / DNA-directed RNA polymerase III subunit RPC3, helical hairpin domain / POLR3C, C-terminal winged-helix domain / RNA polymerase III subunit RPC82-related, helix-turn-helix / RNA polymerase III subunit RPC82 helix-turn-helix domain / Myb-like domain profile. / DNA-directed RNA polymerase, subunit E/RPC8 / Myb-like DNA-binding domain / DNA-directed RNA polymerases I and III subunit AC19 / DNA-directed RNA polymerases I and III subunit AC40 / Zinc finger TFIIB-type profile. / Transcription factor TFIIB / Zinc finger, TFIIB-type / TFIIB zinc-binding / Myb-type HTH DNA-binding domain profile. / TATA-box binding protein, eukaryotic / TATA-box binding protein / TATA-box binding protein, conserved site / Transcription factor TFIID (or TATA-binding protein, TBP) / Transcription factor TFIID repeat signature. / Myb domain / SANT domain / TBP domain superfamily / RNA polymerase Rpb4/RPC9, core / DNA-directed RNA-polymerase II subunit / Rpb4/RPC9 superfamily / RNA polymerase subunit Rpb4/RPC9 / RNA polymerase Rpb4 / SANT SWI3, ADA2, N-CoR and TFIIIB'' DNA-binding domains / Cyclin-like superfamily / Zinc finger TFIIS-type signature. / SANT/Myb domain / HRDC-like superfamily / RNA polymerase Rpb7-like , N-terminal / RNA polymerase Rpb7-like, N-terminal domain superfamily / RNA polymerase subunit Rpb7-like / SHS2 domain found in N terminus of Rpb7p/Rpc25p/MJ0397 / RNA polymerase Rpb2, domain 5 / RNA polymerase Rpb2, domain 5 / RNA polymerase Rpb2, domain 4 / RNA polymerase Rpb2, domain 4 / DNA-directed RNA polymerase, M/15kDa subunit / RNA polymerases M/15 Kd subunit / RNA polymerase subunit 9 / DNA-directed RNA polymerase M, 15kDa subunit, conserved site / RNA polymerases M / 15 Kd subunits signature. / DNA-directed RNA polymerase subunit/transcription factor S / : / RNA polymerase, Rpb8 / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / RNA polymerase Rpb8 / RNA polymerase subunit 8 / RNA polymerase, Rpb5, N-terminal / RNA polymerase Rpb5, N-terminal domain superfamily / RNA polymerase Rpb5, N-terminal domain / DNA-directed RNA polymerase, subunit RPB6 / DNA-directed RNA polymerase subunit RPABC5/Rpb10 / RNA polymerases, subunit N, zinc binding site / RNA polymerase subunit RPB10 / RNA polymerases N / 8 kDa subunit / RNA polymerases N / 8 Kd subunits signature. / DNA directed RNA polymerase, 7 kDa subunit / RNA polymerase archaeal subunit P/eukaryotic subunit RPABC4 / RNA polymerase, subunit H/Rpb5, conserved site / RNA polymerases H / 23 Kd subunits signature. / RNA polymerase subunit CX / DNA-directed RNA polymerase, 30-40kDa subunit, conserved site / DNA-directed RNA polymerase subunit Rpo3/Rpb3/RPAC1 / RNA polymerases D / 30 to 40 Kd subunits signature. / DNA-directed RNA polymerase Rpb11, 13-16kDa subunit, conserved site 類似検索 - ドメイン・相同性
Transcription factor TFIIIB component B'' homolog / 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 polymerase III subunit RPC9 / DNA-directed RNA polymerase III subunit RPC4 / DNA-directed RNA polymerases I and III subunit RPAC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / TATA-box-binding protein / DNA-directed RNA polymerases I, II, and III subunit RPABC3 ...Transcription factor TFIIIB component B'' homolog / 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 polymerase III subunit RPC9 / DNA-directed RNA polymerase III subunit RPC4 / DNA-directed RNA polymerases I and III subunit RPAC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / TATA-box-binding protein / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / snRNA-activating protein complex subunit 1 / snRNA-activating protein complex subunit 4 / snRNA-activating protein complex subunit 3 / DNA-directed RNA polymerase III subunit RPC3 / DNA-directed RNA polymerase III subunit RPC6 / Transcription factor IIIB 50 kDa subunit / DNA-directed RNA polymerase III subunit RPC5 / DNA-directed RNA polymerase III subunit RPC2 / DNA-directed RNA polymerase III subunit RPC10 / DNA-directed RNA polymerase III subunit RPC8 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2025 タイトル: Structural insights into distinct mechanisms of RNA polymerase II and III recruitment to snRNA promoters. 著者: Syed Zawar Shah / Thomas N Perry / Andrea Graziadei / Valentina Cecatiello / Thangavelu Kaliyappan / Agata D Misiaszek / Christoph W Müller / Ewan P Ramsay / Alessandro Vannini / 要旨: RNA polymerase III (Pol III) transcribes short, essential RNAs, including the U6 small nuclear RNA (snRNA). At U6 snRNA genes, Pol III is recruited by the snRNA Activating Protein Complex (SNAPc) and ...RNA polymerase III (Pol III) transcribes short, essential RNAs, including the U6 small nuclear RNA (snRNA). At U6 snRNA genes, Pol III is recruited by the snRNA Activating Protein Complex (SNAPc) and a Brf2-containing TFIIIB complex, forming a pre-initiation complex (PIC). Uniquely, SNAPc also recruits Pol II at the remaining splicesosomal snRNA genes (U1, 2, 4 and 5). The mechanism of SNAPc cross-polymerase engagement and the role of the SNAPC2 and SNAPC5 subunits remain poorly defined. Here, we present cryo-EM structures of the full-length SNAPc-containing Pol III PIC assembled on the U6 snRNA promoter in the open and melting states at 3.2-4.2 Å resolution. The structural comparison revealed differences with the Saccharomyces cerevisiae Pol III PIC and the basis of selective SNAPc engagement within Pol III and Pol II PICs. Additionally, crosslinking mass spectrometry localizes SNAPC2 and SNAPC5 near the promoter DNA, expanding upon existing descriptions of snRNA Pol III PIC structure.