Structure analysis

Transcription antitermination factor Q21 in complex with Q21-binding-element DNA

X-ray diffraction
2.837Å resolution
Source organism: Phage 21
Assemblies composition:
hetero tetramer (preferred)
hetero trimer
Entry contents: 1 distinct polypeptide molecule
2 distinct DNA molecules

Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero tetramer

Binding statistics and energies are not available for this assembly
Assembly 2
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Multimeric state: hetero trimer

Binding statistics and energies are not available for this assembly

Macromolecules

Chains: A, B, C
Length: 162 amino acids
Theoretical weight: 18.67 KDa
Source organism: Phage 21
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: Q9XJQ6 (Residues: 2-23, 24-161; Coverage: 99%)
Gene name: Q
Pfam: Phage antitermination protein Q
InterPro: Bacteriophage 933W, GpQ

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Name: DNA (5'-D(P*CP*TP*CP*AP*TP*TP*GP*AP*GP*CP*AP*AP*AP*TP*GP*AP*GP*CP*AP*AP*G)-3')
Representative chains: D, F
Length: 21 nucleotides
Theoretical weight: 6.48 KDa

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Name: DNA (5'-D(*CP*TP*TP*GP*CP*TP*CP*AP*TP*TP*TP*GP*CP*TP*CP*AP*AP*TP*GP*AP*G)-3')
Representative chains: E, G
Length: 21 nucleotides
Theoretical weight: 6.4 KDa

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