› 2xkh

X-ray diffraction
2.31Å resolution

Xe derivative of C.lacteus mini-Hb Leu86Ala mutant

Released:
DOI: 10.2210/pdb2xkh/pdb
PDB entry 2xkh coloured by chain, front view.
PDB entry 2xkh coloured by chain, side view.
PDB entry 2xkh coloured by chain, top view.
Source organism: Cerebratulus lacteus
Primary publication:
Ligand migration in the apolar tunnel of Cerebratulus lacteus mini-hemoglobin.
Pesce A, Nardini M, Dewilde S, Capece L, Martí MA, Congia S, Salter MD, Blouin GC, Estrin DA, Ascenzi P, Moens L, Bolognesi M, Olson JS
J Biol Chem 286 5347-58 (2011)
PMID: 21147768

Function and Biology Details

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

Structure analysis Details

Assembly composition:
monomeric (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-131222 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Neural hemoglobin Chain: A
Molecule details ›
Chain: A
Length: 110 amino acids
Theoretical weight: 11.5 KDa
Source organism: Cerebratulus lacteus
Expression system: Escherichia coli
UniProt:
  • Canonical: O76242 (Residues: 1-110; Coverage: 100%)
Sequence domains: Globin
Structure domains: Globins

Ligands and Environments

4 bound ligands:
Ligand HEM 1 x HEM
Ligand OXY 1 x OXY
Ligand SO4 1 x SO4
Ligand XE 2 x XE
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RUH3R
Spacegroup: P212121
Unit cell:
a: 42.919Å b: 43.011Å c: 59.472Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.201 0.194 0.266
Expression system: Escherichia coli

Quick links

Citations

3 review citations

Heme-based globin-coupled oxygen sensors: linking oxygen binding to functional regulation of diguanylate cyclase, histidine kinase, and methyl-accepting chemotaxis.
Martínková et al. (2013)
2 more

2 mentions without citation

Determination of ligand pathways in globins: apolar tunnels versus polar gates.
Salter et al. (2012)
1 more