Structure of the complex of Streptomyces griseus protease B and the third domain of the turkey ovomucoid inhibitor at 1.8-A resolution.Read, R.J., Fujinaga, M., Sielecki, A.R., James, M.N.
(1983) Biochemistry 22: 4420-4433
- PubMed: 6414511
- PubMed Abstract:
- Crystal and Molecular Structures of the Complex of Alpha-Chymotrypsin with its Inhibitor Turkey Ovomucoid Third Domain at 1.8 Angstroms Resolution
Fujinaga, M.,Sielecki, A.R.,Read, R.J.,Ardelt, W.,Laskowskijunior, M.,James, M.N.G.
(1987) J.Mol.Biol. 195: 397
- Crystal Structure Studies and Inhibition Kinetics of Tripeptide Chloromethyl Ketone Inhibitors with Streptomyces Griseus Protease B
James, M.N.G.,Brayer, G.D.,Delbaere, L.T.J.,Sielecki, A.R.,Gertler, A.
(1980) J.Mol.Biol. 139: 423
- Tertiary Structural Differences between Microbial Serine Proteases and Pancreatic Serine Enzymes
Delbaere, L.T.J.,Hutcheon, W.L.B.,James, M.N.G.,Theissen, W.E.
(1975) Nature 257: 758
- 4.5 Angstroms Resolution Structure of a Bacterial Serine Protease from Streptomyces Griseus
Codding, P.W.,Delbaere, L.T.J.,Hayakawa, K.,Hutcheon, W.L.B.,James, M.N.G.,Jurasek, L.
(1974) Can.J.Biochem. 52: 208
- Refined Crystal Structure of the Molecular Complex of Streptomyces Griseus Protease B, a Serine Protease, with the Third Domain of the Ovomucoid Inhibitor from Turkey
Fujinaga, M.,Read, R.J.,Sielecki, A.,Ardelt, W.,Laskowski Junior, M.,James, M.N.G.
(1982) Proc.Natl.Acad.Sci.USA 79: 4868
- Amino Acid Sequence Alignment of Bacterial and Mammalian Pancreatic Serine Proteases Based on Topological Equivalences
James, M.N.G.,Delbaere, L.T.J.,Brayer, G.D.
(1978) Can.J.Biochem. 56: 396
- Relationship between the Structures and Activities of Some Microbial Serine Proteases. II. Comparison of the Tertiary Structures of Microbial and Pancreatic Serine Proteases
(1976) Miami Winter Symp. 11: 125
- The 2.8 Angstroms Resolution Structure of Streptomyces Griseus Protease B and its Homology with Alpha-Chymotrypsin and Streptomyces Griseus Protease A
Delbaere, L.T.J.,Brayer, G.D.,James, M.M.G.
(1979) Can.J.Biochem. 57: 135
The structure of the complex between the serine protease Streptomyces griseus protease B (SGPB) and the third domain of the Kazal-type ovomucoid inhibitor from turkey has been solved at 1.8-A resolution and refined to a conventional R factor of 0.125 ...
The structure of the complex between the serine protease Streptomyces griseus protease B (SGPB) and the third domain of the Kazal-type ovomucoid inhibitor from turkey has been solved at 1.8-A resolution and refined to a conventional R factor of 0.125. As others have reported previously for analogous complexes of proteases and protein inhibitors, the inhibitor binds in a fashion similar to that of a substrate; it is not cleaved, but there is a close approach (2.7 A) of the active site nucleophile Ser-195 O gamma to the carbonyl carbon of the reactive peptide bond of the inhibitor. Contrary to the structural reports regarding the other enzyme-inhibitor complexes, we conclude that there is no evidence for a significant distortion of this peptide bond from planarity. The mechanism of inhibition can be understood in terms of the equilibrium thermodynamic parameters Ka, the enzyme-inhibitor association constant, and Khyd, the equilibrium constant for inhibitor hydrolysis. These thermodynamic parameters can be rationalized in terms of the observed structure.