Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.99 kDa 
• Atom Count: 489 
• Modelled Residue Count: 60 
• Deposited Residue Count: 60 
• Unique protein chains: 1

1TCP

NMR STRUCTURE DETERMINATION OF TICK ANTICOAGULANT PEPTIDE (TAP)

• PDB DOI: 10.2210/pdb1TCP/pdb

• Classification: BLOOD COAGULATION INHIBITOR
• Organism(s): Ornithodoros moubata
• Expression System: Komagataella pastoris
• Mutation(s): No 


• Deposited: 1994-10-31 Released: 1995-10-31 
• Deposition Author(s): Brunck, T.K., Lim-Wilby, M.S.L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 10 

Literature

NMR structure determination of tick anticoagulant peptide (TAP).

Lim-Wilby, M.S., Hallenga, K., de Maeyer, M., Lasters, I., Vlasuk, G.P., Brunck, T.K.

(1995) Protein Sci 4: 178-186

• PubMed: 7538849 
• DOI: 10.1002/pro.5560040205
• Primary Citation of Related Structures:  
  1TCP


• PubMed Abstract: 
  

Tick anticoagulant peptide (TAP) is a potent and selective 60-amino acid inhibitor of the serine protease Factor Xa (fXa), the penultimate enzyme in the blood coagulation cascade. The structural features of TAP responsible for its remarkable specificity for fXa are unknown, but the binding to its target appears to be unique. The elucidation of the TAP structure may facilitate our understanding of this new mode of serine protease inhibition and could provide a basis for the design of novel fXa inhibitors. Analyses of homo- and heteronuclear two-dimensional NMR spectra (total correlation spectroscopy, nuclear Overhauser effect spectroscopy [NOESY], constant time heteronuclear single quantum correlation spectroscopy [CT-HSQC], and HSQC-NOESY; 600 MHz; 1.5 mM TAP; pH 2.5) of unlabeled, 13C-labeled, and 15N-labeled TAP provided nearly complete 1H sequence-specific resonance assignments. Secondary structural elements were identified by characteristic NOE patterns and D2O amide proton-exchange experiments. A three-dimensional structure of TAP was generated from 412 NOESY-derived distance and 47 dihedral angle constraints. The structural elements of TAP are similar in some respects to those of the Kunitz serine protease inhibitor family, with which TAP shares weak sequence homology. This structure, coupled with previous kinetic and biochemical information, confirms previous suggestions that TAP has a unique mode of binding to fXa.

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Related Citations: 

• Determination of Disulfide Bond Pairs and Stability in Recombinant Tick Anticoagulant Peptide
  Sardana, M., Sardana, V., Rodkey, J., Wood, T., Ng, A., Vlasuk, G.P., Waxman, J.
  (1993) J Mol Biol 232: 947

• Tick Anticoagulant Peptide (Tap) is a Novel Inhibitor of Blood Coagulation Factor Xa
  Waxman, L., Smith, D.E., Arcuri, K.E., Vlasuk, G.P.
  (1990) Science 248: 593

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Organizational Affiliation: 

Corvas International, Inc., San Diego, California 92121, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TICK ANTICOAGULANT PEPTIDE	A	60	Ornithodoros moubata	Mutation(s): 0
UniProt
Find proteins for P17726 (Ornithodoros moubata) Explore P17726  Go to UniProtKB:  P17726

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 10 
• OLDERADO: 1TCP Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-10-31 
• Released Date: 1995-10-31 
Deposition Author(s): Brunck, T.K., Lim-Wilby, M.S.L.

Revision History  

• Version 1.0: 1995-10-31
  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: 2017-11-29
  Changes: Derived calculations, Other