2xko

X-ray diffraction
2.25Å resolution

Crystal structure of the complex of NtcA with its transcriptional co- activator PipX

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Global nitrogen regulator Chains: A, B
Molecule details ›
Chains: A, B
Length: 222 amino acids
Theoretical weight: 24.86 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Expression system: Escherichia coli
UniProt:
  • Canonical: P29283 (Residues: 1-222; Coverage: 100%)
Gene names: Synpcc7942_0127, ntcA
Sequence domains:
Structure domains:
PipX Chains: C, D
Molecule details ›
Chains: C, D
Length: 89 amino acids
Theoretical weight: 10.54 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: Q7X386 (Residues: 1-89; Coverage: 100%)
Gene name: Synpcc7942_2061
Sequence domains: PII-interacting protein X
Structure domains:

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE BM16
Spacegroup: P41
Unit cell:
a: 52.02Å b: 52.02Å c: 227.73Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.216 0.214 0.245
Expression systems:
  • Escherichia coli
  • Escherichia coli BL21