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Crystal structure of metallo-beta-lactamase IMP-1 mutant (D120E) in complex with citrate.Crystal structure of metallo-beta-lactamase IMP-1 mutant (D120E) in complex with citrate.
Structural highlights
FunctionBLAB_SERMA Confers resistance to imipenem and broad-spectrum beta-lactams. Also hydrolyzes carbapenems. Publication Abstract from PubMedThe emergence and rapid spread of carbapenem-resistant pathogens producing metallo-beta-lactamases such as IMP-1 and NDM-1 have been of great concern in the global clinical setting. The X-ray crystal structures of IMP-1 from Serratia marcescens and its single mutant, D120E, in complexes with citrate were determined at resolutions of 2.00 and 1.85 A, respectively. Two crystal structures indicate that a single mutation at position 120 caused a structural change around Zn1, where the geometry changes from a tetrahedron in the native IMP-1 to a square pyramid in D120E. Based on these two complex structures, the authors synthesized citrate monobenzyl ester 1 to evaluate the structural requirement for the inhibitory activity against IMP-1 and compared the inhibitory activities with nonsubstituted citrate. The introduction of a benzyl group into citrate enhanced the inhibitory activity in comparison to citrate (IC50 > 5 mM). Crystal Structures of Metallo-beta-Lactamase (IMP-1) and Its D120E Mutant in Complexes with Citrate and the Inhibitory Effect of the Benzyl Group in Citrate Monobenzyl Ester.,Yamaguchi Y, Kato K, Ichimaru Y, Jin W, Sakai M, Abe M, Wachino JI, Arakawa Y, Miyagi Y, Imai M, Fukuishi N, Yamagata Y, Otsuka M, Fujita M, Kurosaki H J Med Chem. 2021 Jul 22;64(14):10019-10026. doi: 10.1021/acs.jmedchem.1c00308., Epub 2021 Jul 9. PMID:34242022[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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