Crystal structure of a Y35G mutant of bovine pancreatic trypsin inhibitor.Housset, D., Kim, K.S., Fuchs, J., Woodward, C., Wlodawer, A.
(1991) J.Mol.Biol. 220: 757-770
- PubMed: 1714504
- PubMed Abstract:
- Structure of Form III Crystals of Bovine Pancreatic Trypsin Inhibitor.
Wlodawer, A.,Nachman, J.,Gilliland, G.L.,Gallagher, W.,Woodward, C.
(1987) J.Mol.Biol. 198: 469
- Structural Effects Induced by Removal of a Disulfide-Bridge. The X-Ray Structure of the C30A(Slash)C51A Mutant of Basic Pancreatic Trypsin Inhibitor at 1.6 Angstroms
Eigenbrot, C.,Randal, M.,Kossiakoff, A.A.
(1990) Protein Eng. 3: 591
- X-Ray Crystal Structure of the Protease Inhibitor Domain of Alzheimer'S Amyloid Beta-Protein Precursor
Hynes, T.R.,Randal, M.,Kennedy, L.A.,Eigenbrot, C.,Kossiakoff, A.A.
(1990) Biochemistry 29: 10018
- Comparison of Two Highly Refined Structures of Bovine Pancreatic Trypsin Inhibitor
Wlodawer, A.,Deisenhofer, J.,Huber, R.
(1987) J.Mol.Biol. 193: 145
- Pancreatic Trypsin Inhibitor. A New Crystal Form and its Analysis
Walter, J.,Huber, R.
(1983) J.Mol.Biol. 167: 911
- Structure of Bovine Pancreatic Trypsin Inhibitor. Results of Joint Neutron and X-Ray Refinement of Crystal Form II
Wlodawer, A.,Walter, J.,Huber, R.,Sjolin, L.
(1984) J.Mol.Biol. 180: 307
The structure of a Y35G mutant of bovine pancreatic trypsin inhibitor (BPTI) was solved by molecular replacement and was refined by both simulated annealing and restrained least-squares at 1.8 A resolution. The crystals belong to the space group P422 ...
The structure of a Y35G mutant of bovine pancreatic trypsin inhibitor (BPTI) was solved by molecular replacement and was refined by both simulated annealing and restrained least-squares at 1.8 A resolution. The crystals belong to the space group P42212, with unit cell dimensions a = b = 46.75 A, c = 50.61 A. The final R-factor is 0.159 and the deviation from ideality for bond distances is 0.02 A. The structure of the mutant differs from that of the native protein, showing an overall root-mean-square (r.m.s.) difference of 1.86 A for main-chain atoms. However, the change is mostly localized in the two loops (respective r.m.s. values of 2.04 A and 3.93 A) and the C terminus (r.m.s. 6.79 A), while the core of the protein is well conserved (r.m.s. 0.45 A). The change in the loop regions can be clearly attributed to the mutation while the difference in the C terminus might be only due to a different crystal packing. Seventy water molecules were included in the model but only seven of them are shared with the native structure. Thermal parameters are showing a good correlation with those for the wild-type of BPTI.
Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, MD 21702.