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Figure 4
Carboxylic acid inhibitor–hCA II complex structures. (a) Superposition of direct binding to the zinc: ibuprofen (green; PDB entry 8dj9), saccharin derivative (teal; PDB entry 5clu), an ethanoic acid derivative (chocolate; PDB entry 5fnj), another ethanoic acid derivative (wheat; PDB entry 5flq), propenoic acid (pink; PDB entry 5ehv) and cholate (olive; PDB entry 4n16). (b) Superposition of indirect binding via the ZBS: heteroaryl-pyrazole carboxylic acid derivative (orange; PDB entry 6b4d), an enoic acid derivative (deep teal; PDB entry 5eh8), another enoic acid derivative (warm pink; PDB entry 5fls), 3-phenoxybenzoic acid (pale yellow; PDB entry 5flt), 2,6-dihydroxybenzoic acid (violet purple; PDB entry 4e3f), 2,5-dihydroxybenzoic acid (lemon; PDB entry 4e3d), p-hydroxybenzoic acid (lime green; PDB entry 4e3g), 2-sulfanylbenzoic acid (light pink; PDB entry 4e4a), ferulic acid (marine; PDB entry 6mby), nicotinic acid (deep blue; PDB entry 6mbv), salicylic acid (dark red; PDB entry 6ux1) and 2-hydroxybenzoic acid (brown; PDB entry 5m78). (c) and (d) are active-site close-up views of (a) and (b), respectively. Zinc is shown as a magenta sphere, the hydrophobic pocket is in orange and the hydrophilic pocket is in purple with PDB codes included for reference.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
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