PDBe 2aos

X-ray diffraction
2.9Å resolution

Protein-protein Interactions of protective signalling factor: Crystal structure of ternary complex involving signalling protein from goat (SPG-40), tetrasaccharide and a tripeptide Trp-pro-Trp at 2.9 A resolution

Entry authors: Kumar J, Ethayathulla AS, Srivastava DB, Somvanshi RK, Singh N, Sharma S, Dey S, Bhushan A, Kaur P, Singh TP

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Trp-Pro-Trp tripeptide Chain: D
Molecule details ›
Chain: D
Length: 3 amino acids
Theoretical weight: 488 Da
Source organism: Synthetic construct
Expression system: Not provided
Chitinase-3-like protein 1 Chain: A
Molecule details ›
Chain: A
Length: 361 amino acids
Theoretical weight: 40.73 KDa
Source organism: Capra hircus
  • Canonical: Q8SPQ0 (Residues: 22-383; Coverage: 100%)
Gene name: CHI3L1
Structure domains:

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU300
Spacegroup: P212121
Unit cell:
a: 62.871Å b: 66.512Å c: 107.623Å
α: 90° β: 90° γ: 90°
R R work R free
0.195 0.192 0.239
Expression system: Not provided