Salt bridges: Difference between revisions
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<StructureSection load='' size='300' side='right' caption='Salt bridge between retinoic acid(-) and arg131(+) in [[1cbr]].' scene='Salt_bridges/Salt_bridge/2'> | |||
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<applet load='1cbr' size='300' frame='true' align='right' caption='Salt bridge between retinoic acid(-) and arg131(+) in [[1cbr]].' | <applet load='1cbr' size='300' frame='true' align='right' caption='Salt bridge between retinoic acid(-) and arg131(+) in [[1cbr]].' | ||
scene='Salt_bridges/Salt_bridge/2' /> | scene='Salt_bridges/Salt_bridge/2' /> | ||
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In proteins, salt bridges<ref>PMID: 21287621</ref> occur between amino acid side-chains with opposite positive or negative full-electron charges, namely, (at neutral pH) Glu- or Asp- vs. Arg+ or Lys+. They may also occur between ionized organic ligands, such as acetylcholine+ (or example at right: [[1cbr]]), or inorganic ions, such as K<sup>+</sup> or SO<sub>4</sub><sup>=</sup>, and amino acid side-chains. | In proteins, salt bridges<ref>PMID: 21287621</ref> occur between amino acid side-chains with opposite positive or negative full-electron charges, namely, (at neutral pH) Glu- or Asp- vs. Arg+ or Lys+. They may also occur between ionized organic ligands, such as acetylcholine+ (or example at right: [[1cbr]]), or inorganic ions, such as K<sup>+</sup> or SO<sub>4</sub><sup>=</sup>, and amino acid side-chains. | ||
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===Ultraviolet-B receptor=== | ===Ultraviolet-B receptor=== | ||
UVR8 is an ultraviolet-B receptor in plants such as ''Arabidopsis''. It is a homodimer that, upon irradiation, dissociates into a monomer involved in transcriptional activation of UV protective proteins<ref>PMID:22388820</ref>. Unexpectedly, high ionic strength was found to dissociate the dimer. The homodimer [[4dnw]] contains many [[salt bridges]] and [[cation-pi interactions]] at the interface. [[Suggestions_for_new_articles#April:_Ultraviolet-B_Photoreceptor_Dimer_to_Monomer|More]]. | UVR8 is an ultraviolet-B receptor in plants such as ''Arabidopsis''. It is a homodimer that, upon irradiation, dissociates into a monomer involved in transcriptional activation of UV protective proteins<ref>PMID:22388820</ref>. Unexpectedly, high ionic strength was found to dissociate the dimer. The homodimer [[4dnw]] contains many [[salt bridges]] and [[cation-pi interactions]] at the interface. [[Suggestions_for_new_articles#April:_Ultraviolet-B_Photoreceptor_Dimer_to_Monomer|More]]. | ||
</StructureSection> | |||
==Visualization== | ==Visualization== | ||
Putative salt bridges can be displayed by [[FirstGlance in Jmol]]. | Putative salt bridges can be displayed by [[FirstGlance in Jmol]]. | ||
==References== | ==References== | ||
<references /> | <references /> | ||
