Cell components, interaction types and functional groups involved in the in vitro binding of bisphenol A by Lactiplantibacillus plantarum RS20D and DL7X

Discovery of New AKT1 Inhibitors by Combination of In silico Structure Based Virtual Screening Approaches and Biological Evaluations

10.26434/chemrxiv.7591202 ◽

2019 ◽

Author(s):

Filip Fratev ◽

Denisse A. Gutierrez ◽

Renato J. Aguilera ◽

suman sirimulla

Keyword(s):

Virtual Screening ◽

Success Rate ◽

Protein Interactions ◽

In Silico ◽

Biological Data ◽

In Vitro Binding ◽

Vitro Binding ◽

Screening Protocol ◽

Screening Approaches

AKT1 is emerging as a useful target for treating cancer. Herein, we discovered a new set of ligands that inhibit the AKT1, as shown by in vitro binding and cell line studies, using a newly designed virtual screening protocol that combines structure-based pharmacophore and docking screens. Taking together with the biological data, the combination of structure based pharamcophore and docking methods demonstrated reasonable success rate in identifying new inhibitors (60-70%) proving the success of aforementioned approach. A detail analysis of the ligand-protein interactions was performed explaining observed activities.<br>

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In Vitro Binding of Manganese to Serum Transferrin in Cattle

Acta Veterinaria Scandinavica ◽

10.1186/bf03547829 ◽

1967 ◽

Vol 8 (3) ◽

pp. 228-233

Author(s):

B. Panić

Keyword(s):

Serum Transferrin ◽

In Vitro Binding ◽

Vitro Binding

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ADP-ribosylation of integrin α7 modulates the binding of integrin α7β1 to laminin

Biochemical Journal ◽

10.1042/bj20040590 ◽

2004 ◽

Vol 385 (1) ◽

pp. 309-317 ◽

Cited By ~ 23

Author(s):

Zhefeng ZHAO ◽

Joanna GRUSZCZYNSKA-BIEGALA ◽

Anna ZOLKIEWSKA

Keyword(s):

C2c12 Myotubes ◽

Post Translational Modification ◽

Integrin Β1 ◽

Adp Ribosylation ◽

In Vitro Binding ◽

Vitro Binding ◽

C2c12 Skeletal Muscle Cells ◽

Adp Ribosyltransferase

The extracellular domain of integrin α7 is ADP-ribosylated by an arginine-specific ecto-ADP-ribosyltransferase after adding exogenous NAD+ to intact C2C12 skeletal muscle cells. The effect of ADP-ribosylation on the structure or function of integrin α7β1 has not been explored. In the present study, we show that ADP-ribosylation of integrin α7 takes place exclusively in differentiated myotubes and that this post-translational modification modulates the affinity of α7β1 dimer for its ligand, laminin. ADP-ribosylation in the 37-kDa ‘stalk’ region of α7 that takes place at micromolar NAD+ concentrations increases the binding of the α7β1 dimer to laminin. Increased in vitro binding of integrin α7β1 to laminin after ADP-ribosylation of the 37-kDa fragment of α7 requires the presence of Mn2+ and it is not observed in the presence of Mg2+. In contrast, ADP-ribosylation of the 63-kDa N-terminal region comprising the ligand-binding site of α7 that occurs at approx. 100 μM NAD+ inhibits the binding of integrin α7β1 to laminin. Furthermore, incubation of C2C12 myotubes with NAD+ increases the expression of an epitope on integrin β1 subunit recognized by monoclonal antibody 9EG7. We discuss our results based on the current models of integrin activation. We also hypothesize that ADP-ribosylation may represent a mechanism of regulation of integrin α7β1 function in myofibres in vivo when the continuity of the membrane is compromised and NAD+ is available as a substrate for ecto-ADP-ribosylation.

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