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The structure of a complex between carbonic anhydrase II and a new inhibitor, trifluoromethane sulphonamide
Open accessAbstract
It has recently been shown that aliphatic sulphonamides are good inhibitors of carbonic anhydrase (CA) provided that the pK of the sulphonamide is low. We have determined the structure of the complex between CAII and CF 3 SO 2 NH 2 by X‐ray crystallographic methods. The nitrogen of the sulphonamide is bound to the zinc ion of the enzyme in the usual manner. The other parts of the inhibitor show a different mode of binding from aromatic sulphonamides since the trifluoromethyl group is bound at the hydrophobic part of the active site instead of pointing out from the active site. It should be possible to design new inhibitors specific for the different isoenzymes, starting from the present structure.
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“Moreover, some high potency inhibitors coordinate Zn2+ via uncharged nitrogens with electron lone pairs, such as those found in sulfonamides18 and imidazoles6 (see Figure 13), that seem to interact more strongly than negatively charged nitro groups.7”
From AutoDock4Zn: An Improved AutoDock Force Field for Small-Molecule Docking to Zinc Metalloproteins (2014) · cites this paper as [18]
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“The binding of this very potent but low-molecular-weight inhibitor, through interaction of the deprotonated sulphonamide with the active site metal, was subsequently demonstrated by solving the crystal structure of the enzyme inhibitor complex [25].”
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“The relatively small compound trifluoromethane sulfonamide (TFS) binds to CAs very effectively due to its low p K a (5.9 – 6.2) and its complex with CA II was crystallized (Haakansson and Liljas, 1994).”
InfluentialSupuran, C. T., Scozzafava, A., Popescu, A., BOBES‐TUREAC, R., Banciu, A., CREANGA, A., BOBES‐TUREAC, G., & Banciu, M. D. (1997) · European Journal of Medicinal Chemistry · doi:10.1016/s0223-5234(97)81681-9 · Cited by 57
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GERMYL AMINES AND GERMANOLS INHIBIT CARBONIC ANHYDRASE ISOZYME II BUT NOT ISOZYME I
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“The values are similar to the literature values for simple trifluoromethylsulfonamides [16].”
ResultBindingDB (2013) · UC San Diego · doi:10.7270/q2c24xr8
BindingDB Entry 1529: Structural analysis of inhibitor binding to human carbonic anhydrase II.
BindingDB (2006) · UC San Diego · doi:10.7270/q27w69fk
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Metadata
- Authors
- Håkansson, K., & Liljas, A.
- Affiliations
- Lund University (SE)
- Corresponding author
- Liljas, A.
- ORCID
- Liljas, A.
- Venue
- FEBS Letters
- Publisher
- Wiley
- Published
- 1994-08-22
- Volume
- 350
- Issue
- 2-3
- Pages
- 319-322
- ISSN
- 0014-5793 (ISSN-L)
- 1873-3468
- OpenAlex
- W2020999457
- Cited by
- 36
- References
- 29
- Citations by year
- 2021: 3 · 2018: 1 · 2015: 1 · 2014: 2 · 2012: 2
- FWCI
- 1.27
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- FEBS Letters (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Knut och Alice Wallenbergs Stiftelse
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme function and inhibition
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
- Keywords
- carbonic anhydrase II, enzyme-inhibitor complex, zinc binding, hydrophobic binding, active site, inhibitor design, isozymes
- MeSH terms
- Binding Sites, Carbonic Anhydrases, Carbonic Anhydrase Inhibitors, Chlorofluorocarbons, Methane, Humans, Models, Molecular, Sulfonamides, Crystallography, X-Ray
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