› 2a1b

X-ray diffraction
2.9Å resolution

Carboxysome shell protein ccmK2

Released:
DOI: 10.2210/pdb2a1b/pdb
PDB entry 2a1b coloured by chain, front view.
PDB entry 2a1b coloured by chain, side view.
PDB entry 2a1b coloured by chain, top view.
Source organism: Synechocystis sp. PCC 6803
Primary publication:
Protein structures forming the shell of primitive bacterial organelles.
Kerfeld CA, Sawaya MR, Tanaka S, Nguyen CV, Phillips M, Beeby M, Yeates TO
Science 309 936-8 (2005)
PMID: 16081736

Function and Biology Details

Biochemical function:
Biological process:
Cellular component:
Sequence domains:
Structure domain:

Structure analysis Details

Assembly composition:
homo hexamer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-159858 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Carboxysome shell protein CcmK2 Chains: A, B, C, D, E, F, G, H, I, J, K, L
Molecule details ›
Chains: A, B, C, D, E, F, G, H, I, J, K, L
Length: 116 amino acids
Theoretical weight: 12.61 KDa
Source organism: Synechocystis sp. PCC 6803
Expression system: Escherichia coli
UniProt:
  • Canonical: P72761 (Residues: 1-103; Coverage: 100%)
Gene names: ccmK2, sll1028
Sequence domains: BMC domain
Structure domains: Alpha-Beta Plaits

Ligands and Environments

No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU FR-D
Spacegroup: P21
Unit cell:
a: 69.744Å b: 179.987Å c: 69.769Å
α: 90° β: 119.98° γ: 90°
R-values:
R R work R free
0.313 0.313 0.346
Expression system: Escherichia coli

Quick links

Citations

57 review citations

Frontiers, opportunities, and challenges in biochemical and chemical catalysis of CO2 fixation.
Appel et al. (2013)
56 more

13 mentions without citation

Functions, compositions, and evolution of the two types of carboxysomes: polyhedral microcompartments that facilitate CO2 fixation in cyanobacteria and some proteobacteria.
Rae et al. (2013)
12 more