1ATA

HIGH-RESOLUTION STRUCTURE OF ASCARIS TRYPSIN INHIBITOR IN SOLUTION: DIRECT EVIDENCE FOR A PH INDUCED CONFORMATIONAL TRANSITION IN THE REACTIVE SITE

• PDB DOI: https://doi.org/10.2210/pdb1ATA/pdb

• Classification: PROTEINASE INHIBITOR(TRYPSIN)
• Organism(s): Ascaris suum
• Mutation(s): No 


• Deposited: 1994-05-20 Released: 1994-08-31 
• Deposition Author(s): Clore, G.M., Grasberger, B.L., Gronenborn, A.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

High-resolution structure of Ascaris trypsin inhibitor in solution: direct evidence for a pH-induced conformational transition in the reactive site.

Grasberger, B.L., Clore, G.M., Gronenborn, A.M.

(1994) Structure 2: 669-678

• PubMed: 7922043 
• DOI: https://doi.org/10.1016/s0969-2126(00)00067-8
• Primary Citation of Related Structures:  
  1ATA, 1ATB, 1ATD, 1ATE


• PubMed Abstract: 
  

  The Ascaris trypsin inhibitor (ATI) is a member of a new family of serine protease inhibitors isolated from the helminthic worm Ascaris lumbricoides var suum. This family comprises five chymotrypsin/elastase inhibitors and one trypsin inhibitor. Members are characterized by the presence of five disulfide bonds (two of which are located on either side of the reactive site) in a single small protein domain of 61-62 residues.

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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.81 kDa 
• Atom Count: 467 
• Modelled Residue Count: 62 
• Deposited Residue Count: 62 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ASCARIS TRYPSIN INHIBITOR	A	62	Ascaris suum	Mutation(s): 0
UniProt
Find proteins for P19398 (Ascaris suum) Explore P19398  Go to UniProtKB:  P19398

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Structure Validation

Currently 1ATA does not have a validation slider image.

Entry History 

Deposition Data

• Released Date: 1994-08-31 
Deposition Author(s): Clore, G.M., Grasberger, B.L., Gronenborn, A.M.

Revision History  

• Version 1.0: 1994-08-31
  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: 2022-02-16
  Changes: Database references, Derived calculations, Other