Molecular Playground/CsoR and RcnR: Difference between revisions

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 The Ni(II) site is bound by the N-terminal amine, Cys35, and His64.<ref>PMID: 23215580</ref><ref>PMID: 22471551</ref> Because the Ni(II) site has an octahedral geometry, there are three metal binding residues whose identity is unknown. However, using XAS and lacZ activity assays it is known that the remaining ligands bind to the Ni(II) using N/O atoms and that there are a total of two histidine ligand bound to the Ni(II), leaving the identity of one unaccounted for. Studies have shown that this histidine is not His3, His60, or His67.
-[[Image:Ni Site.png|200px|thumb|Fig. 1: Schematic of known Ni(II) binding residues.]]
+[[Image:Ni Site.png|150px|left|thumb|Fig. 1: Schematic of known Ni(II) binding residues.]]
 The Co(II) site is bound by the the N-terminal amine, His3, Cys35, His64 and possibly His60. The Co(II) site of RcnR also has an octahedral geometry, leaving 1-2 residues whose identity is unknown. XAS reveals that these ligands are bound to Co(II) using N/O atoms and that there are a total of three histidine ligands bound to the Co(II). Studies have shown that His67 is not a Co(II) ligand.