6p19

Electron Microscopy
3.8Å resolution

Q21 transcription antitermination complex: loaded complex

Released:
Source organisms:
Primary publication:
Structural basis of Q-dependent antitermination.
Proc. Natl. Acad. Sci. U.S.A. (2019)
PMID: 31455742
Related structures: EMD-20234

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero nonamer (preferred)
Entry contents:
5 distinct polypeptide molecules
2 distinct DNA molecules
1 distinct RNA molecule
Macromolecules (8 distinct):
DNA-directed RNA polymerase subunit alpha Chains: A, B
Molecule details ›
Chains: A, B
Length: 329 amino acids
Theoretical weight: 36.56 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P0A7Z4 (Residues: 1-329; Coverage: 100%)
Gene names: JW3257, b3295, pez, phs, rpoA, sez
Sequence domains:
DNA-directed RNA polymerase subunit beta Chain: C
Molecule details ›
Chain: C
Length: 1342 amino acids
Theoretical weight: 150.82 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P0A8V2 (Residues: 1-1342; Coverage: 100%)
Gene names: JW3950, b3987, groN, nitB, rif, ron, rpoB, stl, stv, tabD
Sequence domains:
DNA-directed RNA polymerase subunit beta' Chain: D
Molecule details ›
Chain: D
Length: 1430 amino acids
Theoretical weight: 158.31 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P0A8T7 (Residues: 1-1407; Coverage: 100%)
Gene names: JW3951, b3988, rpoC, tabB
Sequence domains:
DNA-directed RNA polymerase subunit omega Chain: E
Molecule details ›
Chain: E
Length: 91 amino acids
Theoretical weight: 10.25 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P0A800 (Residues: 1-91; Coverage: null%)
Gene names: JW3624, b3649, rpoZ
Sequence domains: RNA polymerase Rpb6
Q protein Chain: Q
Molecule details ›
Chain: Q
Length: 162 amino acids
Theoretical weight: 18.67 KDa
Source organism: Phage 21
Expression system: Escherichia coli
UniProt:
  • Canonical: Q9XJQ6 (Residues: 2-23, 24-161; Coverage: 99%)
Gene name: Q
Sequence domains: Phage antitermination protein Q
DNA (123-MER) fragment carrying phage-21 pR' promoter, pause element, and transcribed region, nontemplate strand Chain: 1
Molecule details ›
Chain: 1
Length: 123 nucleotides
Theoretical weight: 38.55 KDa
DNA (123-MER) fragment carrying phage-21 pR' promoter, pause element, and transcribed region, template strand Chain: 2
Molecule details ›
Chain: 2
Length: 123 nucleotides
Theoretical weight: 37.36 KDa
Transcribed RNA Chain: R
Molecule details ›
Chain: R
Length: 70 nucleotides
Theoretical weight: 22.97 KDa

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.8Å
Relevant EMDB volumes: EMD-20234
Expression systems:
  • Escherichia coli BL21
  • Escherichia coli