› 5f8x

X-ray diffraction
1.55Å resolution

The crystal structure of human plasma kallikrein in complex with its peptide inhibitor pkalin-3

Released:
DOI: 10.2210/pdb5f8x/pdb
PDB entry 5f8x coloured by chain, front view.
PDB entry 5f8x coloured by chain, side view.
PDB entry 5f8x coloured by chain, top view.
Source organisms:
Entry authors: Xu M, Jiang L, Xu P, Luo Z, Andreasen P, Huang M

Function and Biology Details

Reaction catalysed: 
Cleaves selectively Arg-|-Xaa and Lys-|-Xaa bonds, including Lys-|-Arg and Arg-|-Ser bonds in (human) kininogen to release bradykinin.
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-137293 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Plasma kallikrein light chain Chain: A
Molecule details ›
Chain: A
Length: 239 amino acids
Theoretical weight: 26.91 KDa
Source organism: Homo sapiens
Expression system: Komagataella pastoris
UniProt:
  • Canonical: P03952 (Residues: 391-629; Coverage: 39%)
Gene names: KLK3, KLKB1
Sequence domains: Trypsin
Structure domains: Trypsin-like serine proteases
CYS-PRO-ALA-ARG-PHE-M70-ALA-LEU-TRP-CYS Chain: B
Molecule details ›
Chain: B
Length: 10 amino acids
Theoretical weight: 1.14 KDa
Source organism: synthetic construct
Expression system: Not provided

Ligands and Environments

2 bound ligands:
Ligand SO4 8 x SO4
Ligand MRZ 1 x MRZ
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRF BEAMLINE BL17U
Spacegroup: P65
Unit cell:
a: 90.339Å b: 90.339Å c: 57.346Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.222 0.221 0.243
Expression systems:
  • Komagataella pastoris
  • Not provided

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