Similar to other viruses in the antigenic cluster, H3N2-β A/swine/Texas/A01104013/2012(had2) had a R189K mutation at the antibody-binding site of the hemagglutinin protein, which caused a recent antigenic drift in subtype H3N2 IAVs (5, 12 ).
The researchers focused on a class of bacterial proteins called periplasmic binding proteins, which have the unusual characteristic of closing up, like a Venus flytrap, when they bind to a particular chemical.
Mutations in the MeCP2 methyl-DNA binding protein, which are the cause of most Rett syndrome cases [ 12], support this model, because human male and female cells with MECP2 mutations exhibit histone hyperacetylation [ 10].
This Gram-positive bacterium possesses specific surface proteins such as fibronectin-binding proteins, collagen-binding proteins, and fibrinogen-binding proteins, which have been implicated as mediators in specific bacterial binding to the extracellular matrix and subsequent biofilm development [1, 5 7].
In most of the studied GPCRs, binding of the sensed ligand molecule (agonist) causes a conformational change in the helical bundle that promotes an interaction with a GTP/GDP binding protein, which then triggers the intracellular signal cascade [ 4, 5].
Resistance to methicillin is a result of the expression of penicillin-binding protein 2a (PBP2a), which causes a low affinity for β-lactam antibiotics.
Most NSAIDS exhibit a high degree of protein binding which causes relatively low volume of distribution into the interstitial fluids but facilitates passage into areas of inflammation with leakage of plasma proteins into exudate [ 17].
Rho GTPases are activated by binding GTP, which causes a conformational change in the protein that greatly increases the affinity for downstream effector proteins.
CsA is lipophilic, readily penetrates the plasma membrane and exerts its immunosuppressive action through binding to the cytosolic protein cyclophilin, which causes inhibition of the Ca2+ and calmodulin-dependent phosphatase calcineurin, thereby disrupting transcriptional induction of interleukin-2 and T-cell activation [ 7].
Nrf2 is sequestered in the cytoplasm by binding to Kelch-like ECH-associated protein 1 (Keap1), which causes proteasomal degradation of Nrf2.
