PDBe 2a18

X-ray diffraction
2.28Å resolution

carboxysome shell protein ccmK4, crystal form 2


Function and Biology Details

Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo hexamer (preferred)
Entry contents:
1 distinct polypeptide molecule
Carbon dioxide-concentrating mechanism protein CcmK homolog 4 Chains: A, B, C
Molecule details ›
Chains: A, B, C
Length: 125 amino acids
Theoretical weight: 13.45 KDa
Source organism: Synechocystis sp. PCC 6803
Expression system: Escherichia coli
  • Canonical: P73407 (Residues: 1-112; Coverage: 100%)
Gene names: ccmK4, slr1839
Sequence domains: BMC domain

Ligands and Environments

1 bound ligand:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 8.2.1
Spacegroup: P21212
Unit cell:
a: 70.549Å b: 125.04Å c: 32.521Å
α: 90° β: 90° γ: 90°
R R work R free
0.204 0.203 0.222
Expression system: Escherichia coli