PDBe 3qp9

X-ray diffraction
1.88Å resolution

The Structure of a C2-type Ketoreductase from a Modular Polyketide Synthase

Released:

Function and Biology Details

Reactions catalysed:
Malonyl-CoA + 6 (2S)-methylmalonyl-CoA + 5 NADPH = narbonolide + 7 CoA + 7 CO(2) + 5 NADP(+) + 2 H(2)O
Malonyl-CoA + 5 (2S)-methylmalonyl-CoA + 5 NADPH = 10-deoxymethynolide + 6 CoA + 6 CO(2) + 5 NADP(+) + 2 H(2)O
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Narbonolide/10-deoxymethynolide synthase PikA2, modules 3 and 4 Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 525 amino acids
Theoretical weight: 53.5 KDa
Source organism: Streptomyces venezuelae
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: Q9ZGI4 (Residues: 920-1423; Coverage: 14%)
Gene name: pikAII
Sequence domains: KR domain
Structure domains: NAD(P)-binding Rossmann-like Domain

Ligands and Environments

No bound ligands

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 8.3.1
Spacegroup: P21
Unit cell:
a: 79.636Å b: 150.088Å c: 86.868Å
α: 90° β: 105.12° γ: 90°
R-values:
R R work R free
0.229 0.227 0.276
Expression system: Escherichia coli BL21(DE3)