Kinetic and structural characterization of mutations of glycine 216 in alpha-lytic protease: a new target for engineering substrate specificity.Mace, J.E., Agard, D.A.
(1995) J Mol Biol 254: 720-736
- PubMed: 7500345
- DOI: 10.1006/jmbi.1995.0650
- Primary Citation of Related Structures:
1GBC, 1GBB, 1GBA, 1GBK, 1GBJ, 1GBI, 1GBH, 1GBF, 1GBE, 1GBD
- PubMed Abstract:
- Structural Basis for Broad Specificity in Alpha-Lytic Protease
Bone, R., Fujushige, A., Kettner, C.A., Agard, D.A.
(1991) Biochemistry 30: 10388
- Structural Plasticity Broadens the Specificity of an Engineered Protease
Bone, R., Silen, J.L., Agard, D.A.
(1989) Nature 339: 191
- Structural Analysis of Specificity: Alpha-Lytic Protease Complexes with Analogues of Reaction Intermediates
Bone, R., Frank, D., Kettner, D., Agard, D.A.
(1989) Biochemistry 28: 7600
- Serine Protease Mechanism: Structure of an Inhibitory Complex of Alpha-Lytic Protease and a Tightly Bound Peptide Boronic Acid
Bone, R., Shenvi, A.B., Kettner, C.A., Agard, D.A.
(1987) Biochemistry 27: 7609
- Refined Structure of Alpha-Lytic Protease at 1.7 Angstroms Resolution. Analysis of Hydrogen Bonding and Solvent Structure
Fujinaga, M., Delbaere, L.T.J., Brayer, G.D., James, M.N.G.
(1985) J Mol Biol 184: 479
- Molecular Structure of the Alpha-Lytic Protease from Myxobacter 495 at 2.8 Angstroms Resolution
Brayer, G.D., Delbaere, L.T.J., James, M.N.G.
(1979) J Mol Biol 131: 743
Gly216 in the active site of the broadly specific MA190 mutant of alpha-lytic protease has been found to be remarkably tolerant of amino acid substitutions. Side-chains as large as Trp can be accommodated within the substrate-binding pocket without a ...
Gly216 in the active site of the broadly specific MA190 mutant of alpha-lytic protease has been found to be remarkably tolerant of amino acid substitutions. Side-chains as large as Trp can be accommodated within the substrate-binding pocket without abolishing catalysis, and have major effects upon the substrate specificity of the enzyme. Kinetic characterization of eleven enzymatically active mutants against a panel of eight substrates clearly revealed the functional consequences of the substitutions at position 216. To understand better the structural basis for their altered specificity, the GA216 + MA190 and GL216 + MA190 mutants have been crystallized both with and without a representative series of peptide boronic acid transition-state analog inhibitors. An empirical description and non-parametric statistical analysis of structural variation among these enzyme: inhibitor complexes is presented. The roles of active site plasticity and dynamics in alpha-lytic protease function and substrate preference are also addressed. The results strongly suggest that substrate specificity determination in alpha-lytic protease is a distributed property of the active site and substrate molecule.
Howard Hughes Medical Institute, University of California, San Francisco 94143-0448, USA.