4dv8
From Proteopedia
Anthrax Lethal Factor metalloproteinase in complex with the Hydroxamic acid based small molecule PT8421
Structural highlights
Function[LEF_BACAN] One of the three proteins composing the anthrax toxin, the agent which infects many mammalian species and that may cause death. LF is the lethal factor that, when associated with PA, causes death. LF is not toxic by itself. It is a protease that cleaves the N-terminal of most dual specificity mitogen-activated protein kinase kinases (MAPKKs or MAP2Ks) (except for MAP2K5). Cleavage invariably occurs within the N-terminal proline-rich region preceding the kinase domain, thus disrupting a sequence involved in directing specific protein-protein interactions necessary for the assembly of signaling complexes. There may be other cytosolic targets of LF involved in cytotoxicity. The proteasome may mediate a toxic process initiated by LF in the cell cytosol involving degradation of unidentified molecules that are essential for macrophage homeostasis. This is an early step in LeTx intoxication, but it is downstream of the cleavage by LF of MEK1 or other putative substrates.[1] [2] [3] [4] [5] Publication Abstract from PubMedFour core structures capable of providing sub-nanomolar inhibitors of anthrax lethal factor (LF) were evaluated by comparing the potential for toxicity, physicochemical properties, in vitro ADME profiles, and relative efficacy in a rat lethal toxin (LT) model of LF intoxication. Poor efficacy in the rat LT model exhibited by the phenoxyacetic acid series (3) correlated with low rat microsome and plasma stability. Specific molecular interactions contributing to the high affinity of inhibitors with a secondary amine in the C2-side chain were revealed by X-ray crystallography. Antidotes to anthrax lethal factor intoxication. Part 3: Evaluation of core structures and further modifications to the C2-side chain.,Jiao GS, Kim S, Moayeri M, Crown D, Thai A, Cregar-Hernandez L, McKasson L, Sankaran B, Lehrer A, Wong T, Johns L, Margosiak SA, Leppla SH, Johnson AT Bioorg Med Chem Lett. 2012 Mar 15;22(6):2242-6. Epub 2012 Feb 1. PMID:22342144[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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