Comprising the HIV spike, the exterior envelope glycoprotein gp120 and the transmembrane glycoprotein gp41 mediate receptor binding, viral entry, and are the targets for neutralizing antibodies.
PI3K proteins are heterodimers composed of a catalytic p110 subunit (PIK3CA) and a regulatory p85 subunit (PIK3R) that mediate receptor binding, activation, and localization of the enzyme.
The external hemagglutinin (HA) glycoprotein mediates receptor binding, fusion, and can generate both strong antibody and cell-mediated immune responses [16] which can be directly assayed and provide useful comparison of adenovirus platforms.
Similar to other steroid receptors, AR contains an amino-terminal activation functional domain (AF1) that affects transcription efficiency; a central DNA-binding domain (DBD), which mediates receptor binding to specific DNA sequences in the promoter/enhancer regions of the target genes; and C-terminal ligand binding domain (LBD) which also contains another activation functional domain (AF2).
By modelling the effect on receptor binding of each mutation at all thirteen sites that differed between A/Panama/2007/99 and A/Fujian/411/02 viruses (Fig. S3 and Fig. S4), we found that the mutations at residues 222 and 225 played the most important role in mediating receptor binding alterations in the Fujian-like viruses (The detailed analysis is given in the legends of Fig. S3).
The E protein mediates receptor binding and membrane fusion, and has two transmembrane segments that function as signal sequences for the transloaction of NS1 into the ER lumen [ 19].
The resulting antibody derivative mediates Fc receptor binding by virtue of the Fc protein and selectively targets cancer cells expressing human integrin α4β1.
Because most of the pharmacological actions of benzodiazepines are mediated through GABAA receptor binding, adaptive alterations in the number, structure, and/or functions of these receptors may play an important role in the development of tolerance.
Intoxication of cells by BoNT is believed to be mediated sequentially by receptor binding by Hc, endocytotic pore formation by Hn, translocation of the catalytic LC domain into the cytosol, and proteolysis of SNARE proteins resulting in disruption of acetylcholine release in exocytosis leading ultimately to muscle paralysis and death [1], [2].
However, at submicromolar concentrations they report that, unlike 25OHC, a structural enantiomer, 'ent-25HC', was inactive (although some activity was observed at high concentration) in an antiviral assay, and concluded that the antiviral effects of low-concentration 25OHC are mediated by specific receptor binding.
It was also recently shown that gangliosides, such as GT1b, mediate receptor/co-receptor binding.
