RNA polymerase II subunit D / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase subunit beta / RNA polymerase II, I and III subunit K ...RNA polymerase II subunit D / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase subunit beta / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerase II subunit E / Histone H2B 1.1 / Histone H2A type 1 / General transcription factor IIF subunit 2 / General transcription and DNA repair factor IIH helicase subunit XPD / General transcription and DNA repair factor IIH helicase/translocase subunit XPB / TATA-box-binding protein / General transcription factor IIE subunit 1 / Transcription initiation factor IIE subunit beta / General transcription factor IIH subunit 1 / General transcription factor IIF subunit 1 / Cyclin-dependent kinase 7 / Cyclin-H / CDK-activating kinase assembly factor MAT1 / Transcription initiation factor IIA subunit 1 / Transcription initiation factor IIA subunit 2 / DNA-directed RNA polymerase II subunit RPB9 / Histone H4 / Histone H3.2 / Transcription initiation factor IIB / General transcription factor IIH subunit 2 / General transcription factor IIH subunit 3 / General transcription factor IIH subunit 5 / General transcription factor IIH subunit 4 Similarity search - Component
Biological species
Homo sapiens (human) / Sus scrofa (pig) / Xenopus laevis (African clawed frog) / unidentified adenovirus / pig (pig)
Method
single particle reconstruction / cryo EM / Resolution: 4.1 Å
Journal: Mol Cell / Year: 2023 Title: Structural basis of transcription reduction by a promoter-proximal +1 nucleosome. Authors: Julio Abril-Garrido / Christian Dienemann / Frauke Grabbe / Taras Velychko / Michael Lidschreiber / Haibo Wang / Patrick Cramer / Abstract: At active human genes, the +1 nucleosome is located downstream of the RNA polymerase II (RNA Pol II) pre-initiation complex (PIC). However, at inactive genes, the +1 nucleosome is found further ...At active human genes, the +1 nucleosome is located downstream of the RNA polymerase II (RNA Pol II) pre-initiation complex (PIC). However, at inactive genes, the +1 nucleosome is found further upstream, at a promoter-proximal location. Here, we establish a model system to show that a promoter-proximal +1 nucleosome can reduce RNA synthesis in vivo and in vitro, and we analyze its structural basis. We find that the PIC assembles normally when the edge of the +1 nucleosome is located 18 base pairs (bp) downstream of the transcription start site (TSS). However, when the nucleosome edge is located further upstream, only 10 bp downstream of the TSS, the PIC adopts an inhibited state. The transcription factor IIH (TFIIH) shows a closed conformation and its subunit XPB contacts DNA with only one of its two ATPase lobes, inconsistent with DNA opening. These results provide a mechanism for nucleosome-dependent regulation of transcription initiation.
Macromolecule #1: General transcription and DNA repair factor IIH helicase subunit XPB
Macromolecule
Name: General transcription and DNA repair factor IIH helicase subunit XPB type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase
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