PDBe 1k21

X-ray diffraction
1.86Å resolution

HUMAN THROMBIN-INHIBITOR COMPLEX

Released:

Function and Biology Details

Reaction catalysed:
Selective cleavage of Arg-|-Gly bonds in fibrinogen to form fibrin and release fibrinopeptides A and B.
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Thrombin light chain Chain: L
Molecule details ›
Chain: L
Length: 36 amino acids
Theoretical weight: 4.1 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P00734 (Residues: 328-363; Coverage: 6%)
Gene name: F2
Thrombin heavy chain Chain: H
Molecule details ›
Chain: H
Length: 259 amino acids
Theoretical weight: 29.78 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P00734 (Residues: 364-622; Coverage: 43%)
Gene name: F2
Sequence domains: Trypsin
Structure domains: Trypsin-like serine proteases
Hirudin variant-2 Chain: I
Molecule details ›
Chain: I
Length: 12 amino acids
Theoretical weight: 1.53 KDa
Source organism: Hirudo medicinalis
UniProt:
  • Canonical: P09945 (Residues: 60-71; Coverage: 19%)

Ligands and Environments

3 bound ligands:

1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU300
Spacegroup: C2
Unit cell:
a: 69.619Å b: 71.546Å c: 71.821Å
α: 90° β: 100.12° γ: 90°
R-values:
R R work R free
0.216 0.216 0.256