Table 3. Comparison of B-factors given in Å2 of amino acid side chains and water molecules in the S1 binding pocket.
β-Trypsin–BPTI complexes |
||||
Wt | Lys15Abu | Lys15DfeGly | Lys15TfeGly | |
B-factor (Å 2 ) | ||||
Average B-factor of protein complex | 20.7 | 21.3 | 19.6 | 21.2 |
All water molecules on average | 31.0 | 33.8 | 31.2 | 32.0 |
BPTI Pro13 – Arg17 | ||||
All atoms | 13.0 | 13.2 | 12.4 | 13.4 |
Main chain | 12.0 | 12.2 | 11.1 | 12.3 |
Side chain | 14.0 | 14.6 | 13.9 | 14.6 |
BPTI P1 residues | ||||
All atoms | 12.1 | 11.9 | 13.2 | 12.9 |
Main chain | 11.6 | 11.5 | 11.0 | 11.8 |
Side chain | 12.5 | 12.8 | 15.5 | 13.7 |
Water molecules in S1 pocket | ||||
A/A′ | —/13.5 | 21.8/— | 17.5/— | 18.4/— |
B | — | 27.7 | 20.0 | 20.5 |
C | — | 31.2 | 22.2 | 20.7 |
D/D′ | —/15.4 | 23.0/— | 17.8/— | 17.9/— |
E/E′ | —/14.1 | 20.7/— | 19.1/— | 19.4/— |