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Osh4p exchanges sterols for phosphatidylinositol 4-phosphate between lipid bilayers
The yeast Kes1p/Osh4p protein functions as a sterol/PI(4)P exchanger between lipid membranes, which suggests the possibility of creating a sterol gradient via phosphoinositide metabolism.
Structural and mechanistic insights into bisphenols action provide guidelines for risk assessment and discovery of bisphenol A substitutes
TLDR
The mechanisms by which BPA and two congeners bind to and activate estrogen receptors (ER) α and β differ from that used by 17β-estradiol, providing a wealth of tools and information that could be used for the development of BPA substitutes devoid of nuclear hormone receptor-mediated activity and more generally for environmental risk assessment.
Phosphatidylserine transport by ORP/Osh proteins is driven by phosphatidylinositol 4-phosphate
TLDR
Here, it is found that the PS transporter Osh6p extracted phosphatidylinositol 4-phosphate (PI4P) and exchanged PS for PI4P between two membranes and demonstrated that the transport of PS by Osh 6p depends on PI4p recognition in vivo.
Unexpected Inhibition of Peptidoglycan LD-Transpeptidase from Enterococcus faecium by the β-Lactam Imipenem*
TLDR
Imipenem, a β-lactam of the carbapenem class, totally inhibited Ldtfm at a low drug concentration that was sufficient to inhibit growth of the bacteria and could therefore be active against E. faecium strains having the dual capacity to manufacture peptidoglycan with transpeptidases of the ld- and dd-specificities.
Structural and Functional Profiling of Environmental Ligands for Estrogen Receptors
TLDR
The precise characterization of the interactions between major environmental pollutants and two of their primary biological targets provides rational guidelines for the design of safer chemicals, and will increase the accuracy and usefulness of structure-based computational methods, allowing for activity prediction of chemicals in risk assessment.
A structural perspective on nuclear receptors as targets of environmental compounds
TLDR
A structural and mechanistic view of endocrine disrupting action using estrogen receptors α and β, (ERα/β), peroxisome proliferator activated receptor γ (PPARγ), and their respective environmental ligands as representative examples are provided.
Reporter Cell Lines for the Characterization of the Interactions between Human Nuclear Receptors and Endocrine Disruptors
TLDR
An overview of reporter cell lines established to characterize the human NR activities of a large panel of EDCs including natural as well as industrial compounds such as pesticides, plasticizers, surfactants, flame retardants, and cosmetics is provided.
Specificity of L,D-Transpeptidases from Gram-positive Bacteria Producing Different Peptidoglycan Chemotypes*
TLDR
Diversification of the structure of peptidoglycan precursors associated with speciation has led to a parallel evolution of the substrate specificity of the l,d-transpeptidases affecting mainly the recognition of the acyl acceptor.
Synergistic activation of human pregnane X receptor by binary cocktails of pharmaceutical and environmental compounds
TLDR
The results suggest that the formation of ‘supramolecular ligands' within the ligand-binding pocket of nuclear receptors contributes to the synergistic toxic effect of chemical mixtures, which may have broad implications for the fields of endocrine disruption, toxicology and chemical risk assessment.
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