1ktw

X-ray diffraction
2Å resolution

IOTA-CARRAGEENASE COMPLEXED TO IOTA-CARRAGEENAN FRAGMENTS

Released:

Function and Biology Details

Reaction catalysed:
Endohydrolysis of 1,4-beta-D-linkages between D-galactose 4-sulfate and 3,6-anhydro-D-galactose-2-sulfate in iota-carrageenans
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
monomeric (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-190254 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecules (3 distinct):
Iota-carrageenase Chains: A, B
Molecule details ›
Chains: A, B
Length: 464 amino acids
Theoretical weight: 51.94 KDa
Source organism: Alteromonas macleodii
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: Q9F5I8 (Residues: 28-491; Coverage: 99%)
Gene name: cgiA
Sequence domains: Pectate lyase superfamily protein
Structure domains: Single-stranded right-handed beta-helix, Pectin lyase-like

Ligands and Environments

Carbohydrate polymer : NEW Components: G4S, DGS
Carbohydrate polymer : NEW Components: G4S, DGS
3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE BM30A
Spacegroup: P21
Unit cell:
a: 54.73Å b: 122.31Å c: 91.941Å
α: 90° β: 90.99° γ: 90°
R-values:
R R work R free
0.203 0.203 0.238
Expression system: Escherichia coli BL21(DE3)