1LDT

COMPLEX OF LEECH-DERIVED TRYPTASE INHIBITOR WITH PORCINE TRYPSIN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

The three-dimensional structure of recombinant leech-derived tryptase inhibitor in complex with trypsin. Implications for the structure of human mast cell tryptase and its inhibition.

Stubbs, M.T., Morenweiser, R., Sturzebecher, J., Bauer, M., Bode, W., Huber, R., Piechottka, G.P., Matschiner, G., Sommerhoff, C.P., Fritz, H., Auerswald, E.A.

(1997) J Biol Chem 272: 19931-19937

  • DOI: 10.1074/jbc.272.32.19931
  • Primary Citation of Related Structures:  
    1LDT

  • PubMed Abstract: 

    • The x-ray crystal structure of recombinant leech-derived tryptase inhibitor (rLDTI) has been solved to a resolution of 1.9 A in complex with porcine trypsin. The nonclassical Kazal-type inhibitor exhibits the same overall architecture as that observed in solution and in rhodniin ...

    The x-ray crystal structure of recombinant leech-derived tryptase inhibitor (rLDTI) has been solved to a resolution of 1.9 A in complex with porcine trypsin. The nonclassical Kazal-type inhibitor exhibits the same overall architecture as that observed in solution and in rhodniin. The complex reveals structural aspects of the mast cell proteinase tryptase. The conformation of the binding region of rLDTI suggests that tryptase has a restricted active site cleft. The basic amino terminus of rLDTI, apparently flexible from previous NMR measurements, approaches the 148-loop of trypsin. This loop has an acidic equivalent in tryptase, suggesting that the basic amino terminus could make favorable electrostatic interactions with the tryptase molecule. A series of rLDTI variants constructed to probe this hypothesis confirmed that the amino-terminal Lys-Lys sequence plays a role in inhibition of human lung tryptase but not of trypsin or chymotrypsin. The location of such an acidic surface patch is in accordance with the known low molecular weight inhibitors of tryptase.

    Related Citations: 
    • Structure of Leech Derived Tryptase Inhibitor (Ldti-C) in Solution
      Muhlhahn, P., Czisch, M., Morenweiser, R., Habermann, B., Engh, R.A., Sommerhoff, C.P., Auerswald, E.A., Holak, T.A.
      (1994) FEBS Lett 355: 290
    • Recombinant Leech-Derived Tryptase Inhibitor: Construction, Production, Protein Chemical Characterization and Inhibition of HIV-1 Replication
      Auerswald, E.A., Morenweiser, R., Sommerhoff, C.P., Piechottka, G.P., Eckerskorn, C., Gurtler, L.G., Fritz, H.
      (1994) Biol Chem Hoppe Seyler 375: 695
    • A Kazal-Type Inhibitor of Human Mast Cell Tryptase: Isolation from the Medical Leech Hirudo Medicinalis, Characterization, and Sequence Analysis
      Sommerhoff, C.P., Sollner, C., Mentele, R., Piechottka, G.P., Auerswald, E.A., Fritz, H.
      (1994) Biol Chem Hoppe Seyler 375: 685
    Organizational Affiliation: 

    Max-Planck-Institut für Biochemie, Am Klopferspitz, D-82152 Martinsried bei München, Germany.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRYPSINA [auth T]223Sus scrofaMutation(s): 0 
EC: 3.4.21.4
UniProt
Find proteins for P00761 (Sus scrofa)
Explore P00761 
Go to UniProtKB:  P00761
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00761
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TRYPTASE INHIBITORB [auth L]46Hirudo medicinalisMutation(s): 0 
UniProt
Find proteins for P80424 (Hirudo medicinalis)
Explore P80424 
Go to UniProtKB:  P80424
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP80424
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
C [auth T]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.4α = 90
b = 63.4β = 90
c = 131.2γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 1997-05-15 
  • Released Date: 1998-05-20 
    • Deposition Author(s): Stubbs, M.T.

Revision History  (Full details and data files)

  • Version 1.0: 1998-05-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance