PDBe 1zbk

X-ray diffraction
2.9Å resolution

Recognition of specific peptide sequences by signalling protein from sheep mammary gland (SPS-40): Crystal structure of the complex of SPS-40 with a peptide Trp-Pro-Trp at 2.9A resolution

Source organisms:
Entry authors: Srivastava DB, Ethayathulla AS, Kumar J, Singh N, Somvanshi RK, Sharma S, Dey S, Singh TP

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Molecule details ›
Chain: C
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: 40.61 KDa
Source organism: Ovis aries
  • Canonical: Q6TMG6 (Residues: 1-361; Coverage: 100%)
Gene name: CHI3L1
Sequence domains: Glycosyl hydrolases family 18
Structure domains:

Ligands and Environments

1 bound ligand:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU300
Spacegroup: P212121
Unit cell:
a: 62.64Å b: 66.45Å c: 107.44Å
α: 90° β: 90° γ: 90°
R R work R free
0.209 0.207 0.235
Expression system: Not provided