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. Author manuscript; available in PMC: 2023 Dec 2.
Published in final edited form as: Br J Pharmacol. 2020 Oct 28;179(14):3628–3644. doi: 10.1111/bph.15254

Table 2.

4-BCCA interactions with key residues.

Protein Ligand Contact Frequency (%)
F584 Residue 585 Residue 610 adjacent subunit Residue 610 adjacent subunit I611 adjacent subunit I613 I613 adjacent subunit I613 adjacent subunit I613 opposite subunit Residue 614 adjacent subunit Residue 614 adjacent subunit
WT A - - 97.60 - 67.20 73.80 - - - 97.80 -
B 64.00 - 82.40 - 79.60 87.40 - - - - -
C - - 54.80 - 76.20 - - - - 60.60 -
D 77.20 57.60 56.20 - 90.00 86.20 50.60 - - 99.60 -
L610F A 92.40 89.60 97.00 - - 79.80 - - - - -
B - - 100.00 - 84.40 99.00 - - - 97.80 -
C 59.60 - 67.20 - 85.60 88.80 - - - - -
D 51.40 - - - - - - - - - -
S614L A - - 80.22 - 95.60 53.63 - - - - -
B 61.32 - 70.11 - 76.48 - - - - 60.22 -
C 94.07 86.15 - - - - - - - - -
D 66.59 79.12 100.00 - - 79.34 59.56 - - 85.05 -
S614Q A 86.17 - 87.07 - 66.21 75.28 - - - 82.54 -
B* - - 74.60 - - 64.40 - - - 86.39 74.38
C - 54.88 90.48 - 74.60 76.19 - - - 99.77 -
D 57.60 - 71.43 - 82.77 75.06 - - - 78.68 -
S614N A 92.40 - 73.80 - 81.60 87.60 - - - - -
B - - 72.00 - 97.20 77.40 - - - 96.60 -
C* - - 79.40 59.00 - 85.20 - 65.00 80.20 86.00 97.60
D - - 80.00 - 87.20 79.80 - - - 74.20 -
M585W A 89.00 - 82.20 - 84.80 95.60 - - - - -
B - - 81.40 - 90.00 87.80 - - - 77.60 -
C 54.20 - 64.40 - 67.20 70.60 - - - 95.40 -
D* - - - 93.20 - - - 89.60 74.40 - 65.00
M585A A 65.60 - 97.80 - 84.60 86.40 - - - 70.80 -
B - - 82.60 - 92.00 92.80 - - - 74.20 -
C 65.80 - 78.60 - 84.00 73.80 - - - 75.20 -
D 97.20 - 77.40 - 88.60 88.60 - - - - -

Contact frequencies between 4-BCCA and key protein residues in all mutant simulations and an example wild type simulation. Contacts that lasted for less than 50% of the simulation are not shown. Ligands that entered the channel pore are marked with asterisks (*).