Bidentate Zinc chelators for alpha-carbonic anhydrases that produce a trigonal bipyramidal coordination geometry.
A series of new zinc binding groups (ZBGs) has been evaluated kinetically on 13 carbonic anhydrase (CA) isoforms. The fragments show affinity for all isoforms with IC(50) values in the range of 2-11 microM. The crystal structure of hCA II in complex with one such fragment reveals a bidentate binding mode with a trigonal-bipyramidal coordination geometry at the Zn(2+) center. The fragment also interacts with Thr199 and Thr200 through hydrogen bonding and participates in a water network. Further development of this ZBG should increase the binding affinity leading to a structurally distinct and promising class of CA inhibitors.
Schulze Wischeler
Johannes
J
Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Marbacher Weg 6, 35032 Marburg, Germany.
Innocenti
Alessio
A
Vullo
Daniela
D
Agrawal
Arpita
A
Cohen
Seth M
SM
Heine
Andreas
A
Supuran
Claudiu T
CT
Klebe
Gerhard
G
D001665:Binding Sites; D002257:Carbonic Anhydrase Inhibitors / Q000737:chemistry*; D002256:Carbonic Anhydrases / Q000737:chemistry* / Q000378:metabolism; D002614:Chelating Agents / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006801:Humans; D011485:Protein Binding; D020033:Protein Isoforms / Q000737:chemistry / Q000378:metabolism; D017434:Protein Structure, Tertiary; D015032:Zinc / Q000737:chemistry*
D002257:Carbonic Anhydrase Inhibitors; D002614:Chelating Agents; D020033:Protein Isoforms; D002256:Carbonic Anhydrases; D015032:Zinc