Electrostatic potential maps: Difference between revisions
Eric Martz (talk | contribs) |
Eric Martz (talk | contribs) No edit summary |
||
Line 1: | Line 1: | ||
It is revealing to visualize the distribution of electrostatic charges, [https://en.wikipedia.org/wiki/Electric_potential electrostatic potential], on molecular [https://en.wikipedia.org/wiki/Van_der_Waals_surface van der Waals surfaces]. Most protein-protein and protein-ligand interactions are largely electrostatic in nature, via hydrogen bonds and ionic interactions. Their strengths are modulated by the nature of the solvent: pure water or high ionic strength aqueous solution<ref>This opening paragraph was adapted from text authored by [[User:Karsten Theis]] in [[Jmol/Electrostatic potential]].</ref>. [[Missing residues and incomplete sidechains|Missing atoms or residues]], nearly universal in [[empirical models]], cause [[Missing_residues_and_incomplete_sidechains#Why_Missing_Residues_Matter|errors in the map]]. Therefore it is '''{{font color|red|crucial to use a model without missing atoms}}''', which could be an [[Missing_residues_and_incomplete_sidechains#AlphaFold_models_have_no_missing_atoms|AlphaFold model]]. | It is revealing to visualize the distribution of electrostatic charges, [https://en.wikipedia.org/wiki/Electric_potential electrostatic potential], on molecular [https://en.wikipedia.org/wiki/Van_der_Waals_surface van der Waals surfaces]. Most protein-protein and protein-ligand interactions are largely electrostatic in nature, via hydrogen bonds and ionic interactions. Their strengths are modulated by the nature of the solvent: pure water or high ionic strength aqueous solution<ref>This opening paragraph was adapted from text authored by [[User:Karsten Theis]] in [[Jmol/Electrostatic potential]].</ref>. Charged residues modulate enzyme efficiency over considerable distances<ref>PMID: 39928564</ref>.[[Missing residues and incomplete sidechains|Missing atoms or residues]], nearly universal in [[empirical models]], cause [[Missing_residues_and_incomplete_sidechains#Why_Missing_Residues_Matter|errors in the map]]. Therefore it is '''{{font color|red|crucial to use a model without missing atoms}}''', which could be an [[Missing_residues_and_incomplete_sidechains#AlphaFold_models_have_no_missing_atoms|AlphaFold model]]. | ||
While exploring a structure in [[FirstGlance in Jmol]], electrostatic potential maps can be generated with a few mouse clicks -- see [[#iCn3D via FirstGlance in Jmol|instructions below]]. | While exploring a structure in [[FirstGlance in Jmol]], electrostatic potential maps can be generated with a few mouse clicks -- see [[#iCn3D via FirstGlance in Jmol|instructions below]]. | ||
==Gallery== | ==Gallery== |