Journal: Science / Year: 2022 Title: Structures of +1 nucleosome-bound PIC-Mediator complex. Authors: Xizi Chen / Xinxin Wang / Weida Liu / Yulei Ren / Xuechun Qu / Jiabei Li / Xiaotong Yin / Yanhui Xu / Abstract: RNA polymerase II-mediated eukaryotic transcription starts with the assembly of the preinitiation complex (PIC) on core promoters. The +1 nucleosome is well positioned about 40 base pairs downstream ...RNA polymerase II-mediated eukaryotic transcription starts with the assembly of the preinitiation complex (PIC) on core promoters. The +1 nucleosome is well positioned about 40 base pairs downstream of the transcription start site (TSS) and is commonly known as a barrier of transcription. The +1 nucleosome-bound PIC-Mediator structures show that PIC-Mediator prefers binding to T40N nucleosome located 40 base pairs downstream of TSS and contacts T50N but not the T70N nucleosome. The nucleosome facilitates the organization of PIC-Mediator on the promoter by binding TFIIH subunit p52 and Mediator subunits MED19 and MED26 and may contribute to transcription initiation. PIC-Mediator exhibits multiple nucleosome-binding patterns, supporting a structural role of the +1 nucleosome in the coordination of PIC-Mediator assembly. Our study reveals the molecular mechanism of PIC-Mediator organization on chromatin and underscores the significance of the +1 nucleosome in regulating transcription initiation.
UniProtKB: General transcription factor IIF subunit 1
+
Macromolecule #9: General transcription and DNA repair factor IIH helicase subunit XPD
Macromolecule
Name: General transcription and DNA repair factor IIH helicase subunit XPD type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase
UniProtKB: General transcription factor IIH subunit 3
+
Macromolecule #33: General transcription factor IIH subunit 5
Macromolecule
Name: General transcription factor IIH subunit 5 / type: protein_or_peptide / ID: 33 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)
Organism: Homo sapiens (human)
Molecular weight
Theoretical: 8.060362 KDa
Recombinant expression
Organism: Homo sapiens (human)
Sequence
String:
MVNVLKGVLI ECDPAMKQFL LYLDESNALG KKFIIQDIDD THVFVIAELV NVLQERVGEL MDQNAFSLTQ K
UniProtKB: General transcription factor IIH subunit 5
+
Macromolecule #34: 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: 34 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase
In the structure databanks used in Yorodumi, some data are registered as the other names, "COVID-19 virus" and "2019-nCoV". Here are the details of the virus and the list of structure data.
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)
EMDB accession codes are about to change! (news from PDBe EMDB page)
The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
The EM Navigator/Yorodumi systems omit the EMD- prefix.
Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator
Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.
Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi