› 1kr7

X-ray diffraction
1.5Å resolution

Crystal structure of the nerve tissue mini-hemoglobin from the nemertean worm Cerebratulus lacteus

Released:
DOI: 10.2210/pdb1kr7/pdb
PDB entry 1kr7 coloured by chain, front view.
PDB entry 1kr7 coloured by chain, side view.
PDB entry 1kr7 coloured by chain, top view.
Source organism: Cerebratulus lacteus
Primary publication:
The 109 residue nerve tissue minihemoglobin from Cerebratulus lacteus highlights striking structural plasticity of the alpha-helical globin fold.
Pesce A, Nardini M, Dewilde S, Geuens E, Yamauchi K, Ascenzi P, Riggs AF, Moens L, Bolognesi M
Structure 10 725-35 (2002)
PMID: 12015154

Function and Biology Details

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

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: 11.55 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 SO4 1 x SO4
Ligand ACT 1 x ACT
Ligand HEM 1 x HEM
Ligand OXY 1 x OXY
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID29
Spacegroup: P212121
Unit cell:
a: 42.721Å b: 43.173Å c: 60.11Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.156 0.153 0.187
Expression system: Escherichia coli

Quick links

Citations

5 review citations

Structural divergence and distant relationships in proteins: evolution of the globins.
Lecomte et al. (2005)
4 more

7 mentions without citation

Ancestral hemoglobins in Archaea.
Freitas et al. (2004)
6 more