1HIA

KALLIKREIN COMPLEXED WITH HIRUSTASIN

• PDB DOI: https://doi.org/10.2210/pdb1HIA/pdb

• Classification: COMPLEX (PROTEASE/INHIBITOR)
• Organism(s): Sus scrofa, Hirudo medicinalis
• Mutation(s): No 


• Deposited: 1996-12-12 Released: 1997-12-24 
• Deposition Author(s): Mittl, P., Di Marco, S., Gruetter, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.311 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Literature

A new structural class of serine protease inhibitors revealed by the structure of the hirustasin-kallikrein complex.

Mittl, P.R., Di Marco, S., Fendrich, G., Pohlig, G., Heim, J., Sommerhoff, C., Fritz, H., Priestle, J.P., Grutter, M.G.

(1997) Structure 5: 253-264

• PubMed: 9032072 
• DOI: https://doi.org/10.1016/s0969-2126(97)00183-4
• Primary Citation of Related Structures:  
  1HIA


• PubMed Abstract: 
  

  Hirustasin belongs to a class of serine protease inhibitors characterized by a well conserved pattern of cysteine residues. Unlike the closely related inhibitors, antistasin/ghilanten and guamerin, which are selective for coagulation factor Xa or neutrophil elastase, hirustasin binds specifically to tissue kallikrein. The conservation of the pattern of cysteine residues and the significant sequence homology suggest that these related inhibitors possess a similar three-dimensional structure to hirustasin.

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Organizational Affiliation: 

CDDT Pharmaceutical Research, Ciba-Geigy Ltd., 4002 Basel, Switzerland.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 61.66 kDa 
• Atom Count: 4,584 
• Modelled Residue Count: 556 
• Deposited Residue Count: 560 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
KALLIKREIN	A, D [auth X]	80	Sus scrofa	Mutation(s): 0  EC: 3.4.21.35
UniProt
Find proteins for P00752 (Sus scrofa) Explore P00752  Go to UniProtKB:  P00752

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
KALLIKREIN	B, E [auth Y]	152	Sus scrofa	Mutation(s): 0  EC: 3.4.21.35
UniProt
Find proteins for P00752 (Sus scrofa) Explore P00752  Go to UniProtKB:  P00752

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
HIRUSTASIN	C [auth I], F [auth J]	48	Hirudo medicinalis	Mutation(s): 0
UniProt
Find proteins for P80302 (Hirudo medicinalis) Explore P80302  Go to UniProtKB:  P80302

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.311 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.9	α = 90
b = 86	β = 90
c = 69.4	γ = 90

Software Package:

Software Name	Purpose
MARXDS	data collection
MARSCALE	data reduction
AMoRE	phasing
X-PLOR	refinement
MARXDS	data reduction
MARSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-12-24 
Deposition Author(s): Mittl, P., Di Marco, S., Gruetter, M.

Revision History  

• Version 1.0: 1997-12-24
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-09
  Changes: Database references, Refinement description