While nano/micro patterns have been reported to be highly effective in modulating stem cell differentiation by regulating the cell affinity and extension, carbon-derived patterns are also capable of upregulating the differentiation of hMSCs.
Cells control adhesion via integrins by regulating the amount of integrins expressed on the cell surface and also by modulating the affinity of integrins to their substrates.
Cysteine oxidation is necessary for hydratase activity, and the increased Lewis acidity of the FeIII afforded by cysteine oxidation is believed to regulate the affinity of a catalytic water molecule for the metal center.
Thus, the OASF conformation defined by the precise intramolecular coiled-coil arrangements regulates the affinity of STIM1 ORAI1 coupling requisite for channel gating.
Since phosphorylation in the motor domain regulates the affinity of hMyo3A to actin, we examined dephosphorylation of the hMyo3A-MDIQo by retina extract, PP1c, and PP2Ac.
Taken together, the Arg-finger in the a-subunit shapes the trajectory of the protons in the Fo rotor by dynamically regulating the proton affinity of the D/E-site in the c-subunit.
Two studies have proposed that tetraspanins may regulate integrin ligand binding by regulating integrin affinity state.
Finally, we further characterise the requirements of Spalt to maintain epithelial integrity by regulating cellular affinities between cells located in the central wing region.
It is known that Granulocyte-macrophage colony-stimulating factor (GM-CSF) up-regulates the binding of eosinophils to VCAM-1 or fibronectin (CS-1 region) by up-regulating the binding affinity of VLA-4 to VCAM-1 (or to CS-1), which is not associated with changes in the integrin expression [ 11].
By regulating low-affinity interactions, these short sequence motifs (annotated instances are usually 3 10 amino acids long) can target proteins to a particular subcellular location, recruit enzymes that alter the chemical state of the motif by post-translational modifications (PTMs), control the stability of a protein, and promote recruitment of binding factors to facilitate complex formation.
