1LDT

COMPLEX OF LEECH-DERIVED TRYPTASE INHIBITOR WITH PORCINE TRYPSIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 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


  • 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 observe ...

    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: 
    • 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
    • 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPSIN
T
223Sus scrofaMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Go to UniProtKB:  P00761
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRYPTASE INHIBITOR
L
46Hirudo medicinalisMutation(s): 0 
Find proteins for P80424 (Hirudo medicinalis)
Go to UniProtKB:  P80424
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
T
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.197 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 63.400α = 90.00
b = 63.400β = 90.00
c = 131.200γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
MOSFLMdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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