5db8

X-ray diffraction
2.55Å resolution

Structure of human DNA polymerase beta Host-Guest complex with the N7MG base paired with a dA

Released:
Source organism: Homo sapiens
Primary publication:
N7 Methylation Alters Hydrogen-Bonding Patterns of Guanine in Duplex DNA.
J. Am. Chem. Soc. (2015)
PMID: 26517568

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
1 distinct polypeptide molecule
3 distinct DNA molecules
Macromolecules (4 distinct):
DNA polymerase beta Chain: A
Molecule details ›
Chain: A
Length: 335 amino acids
Theoretical weight: 38.24 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P06746 (Residues: 1-335; Coverage: 100%)
Gene name: POLB
Sequence domains:
Structure domains:
DNA (5'-D(*CP*CP*GP*AP*CP*GP*TP*CP*GP*CP*AP*TP*AP*AP*GP*C)-3') Chain: T
Molecule details ›
Chain: T
Length: 16 nucleotides
Theoretical weight: 4.87 KDa
Source organism: Homo sapiens
Expression system: Not provided
DNA (5'-D(*GP*CP*TP*(FMG)P*AP*TP*GP*CP*GP*A)-3') Chain: P
Molecule details ›
Chain: P
Length: 10 nucleotides
Theoretical weight: 3.12 KDa
Source organism: Homo sapiens
Expression system: Not provided
DNA (5'-D(P*GP*TP*CP*GP*G)-3') Chain: D
Molecule details ›
Chain: D
Length: 5 nucleotides
Theoretical weight: 1.54 KDa
Source organism: Homo sapiens
Expression system: Not provided

Ligands and Environments

1 bound ligand:

1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 5.0.3
Spacegroup: P21
Unit cell:
a: 54.149Å b: 78.904Å c: 54.751Å
α: 90° β: 105.39° γ: 90°
R-values:
R R work R free
0.184 0.18 0.258
Expression systems:
  • Escherichia coli
  • Not provided