[English] 日本語
Yorodumi Papers
- Database of articles cited by EMDB/PDB/SASBDB data -

+
Search query

Keywords
Structure methods
Author
Journal
IF

-
Structure paper

TitleStructural basis for transcription inhibition by E. coli SspA.
Journal, issue, pagesNucleic Acids Res, Vol. 48, Issue 17, Page 9931-9942, Year 2020
Publish dateSep 25, 2020
AuthorsFulin Wang / Jing Shi / Dingwei He / Bei Tong / Chao Zhang / Aijia Wen / Yu Zhang / Yu Feng / Wei Lin /
PubMed AbstractStringent starvation protein A (SspA) is an RNA polymerase (RNAP)-associated protein involved in nucleotide metabolism, acid tolerance and virulence of bacteria. Despite extensive biochemical and ...Stringent starvation protein A (SspA) is an RNA polymerase (RNAP)-associated protein involved in nucleotide metabolism, acid tolerance and virulence of bacteria. Despite extensive biochemical and genetic analyses, the precise regulatory role of SspA in transcription is still unknown, in part, because of a lack of structural information for bacterial RNAP in complex with SspA. Here, we report a 3.68 Å cryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo) with SspA. Unexpectedly, the structure reveals that SspA binds to the E. coli σ70-RNAP holoenzyme as a homodimer, interacting with σ70 region 4 and the zinc binding domain of EcoRNAP β' subunit simultaneously. Results from fluorescent polarization assays indicate the specific interactions between SspA and σ70 region 4 confer its σ selectivity, thereby avoiding its interactions with σs or other alternative σ factors. In addition, results from in vitro transcription assays verify that SspA inhibits transcription probably through suppressing promoter escape. Together, the results here provide a foundation for understanding the unique physiological function of SspA in transcription regulation in bacteria.
External linksNucleic Acids Res / PubMed:32785630 / PubMed Central
MethodsEM (single particle)
Resolution3.58 - 3.68 Å
Structure data

30307

7c97

EMDB-30307, PDB-7c97:
Cryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo) with SspA
Method: EM (single particle) / Resolution: 3.68 Å

30376

7chw

EMDB-30376: Cryo-EM structure of anEscherichia coli RNAP-promoter open complex (RPo)
PDB-7chw: Cryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo)
Method: EM (single particle) / Resolution: 3.58 Å

Chemicals

ChemComp-MG:
Unknown entry

ChemComp-ZN:
Unknown entry

Source
  • escherichia coli (E. coli)
  • escherichia coli (strain k12) (bacteria)
KeywordsTRANSFERASE/DNA / Stringent starvation protein A / RNA polymerase / promoter escape / zinc binding domain / GENE REGULATION / TRANSFERASE-DNA complex / TRANSCRIPTION/DNA / Transcription initiation complex / TRANSCRIPTION / TRANSCRIPTION-DNA complex

+
About Yorodumi Papers

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbjlvh1.pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
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

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi Papers

Database of articles cited by EMDB/PDB/SASBDB data

  • Database of articles cited by EMDB, PDB, and SASBDB entries
  • Using PubMed data

Related info.:EMDB / PDB / SASBDB / Yorodumi / EMN Papers / Changes in new EM Navigator and Yorodumi

Read more