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