PDBe 2f8p

X-ray diffraction
1.93Å resolution

Crystal structure of obelin following Ca2+ triggered bioluminescence suggests neutral coelenteramide as the primary excited state

Released:

Function and Biology Details

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

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Obelin Chain: A
Molecule details ›
Chain: A
Length: 195 amino acids
Theoretical weight: 22.24 KDa
Source organism: Obelia longissima
Expression system: Escherichia coli
UniProt:
  • Canonical: Q27709 (Residues: 1-195; Coverage: 100%)
Sequence domains:
Structure domains: EF-hand

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-ID
Spacegroup: P43
Unit cell:
a: 64.26Å b: 64.26Å c: 63.049Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.192 0.19 0.23
Expression system: Escherichia coli