MgRNA: Classification of Mg2+ binding sites in RNA crystal structures

	MgRNA: Classification of Mg²⁺ binding sites in RNA crystal structures
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List of Mg²⁺ binding sites in structure 2wh1

2WH1 (3.45Å) -- RIBOSOME : Insights into translational termination from the structure of rf2 bound to the ribosome
List of all 173 Mg²⁺ binding sites in the PDB structure 2wh1 in the full dataset (switch to benchmark dataset)
Sites in the table can be ordered by the following fields by clicking the column header: "benchmark dataset", "Coordination Number", "Qv ^#", "Qs ^#", "Qe ^#", "Site type" or "Mg²⁺ ID"
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Mg²⁺ ion		Site type	Validation parameters
PDB ID	Mg²⁺ ID	Site type	Coordination Number	Qv ^#	Qs ^#	Qe ^#	benchmark dataset
2wh1	Z153	O_b	1	0.02	0	0.39	no
2wh1	Z154	O_ph	1	0.05	0	0.57	no
2wh1	Z155	Mg²⁺ not bound by RNA	0	0	0	0.72	no
2wh1	Z156	Mg²⁺ not bound by RNA	0	0	0	0.87	no
2wh1	Z157	Mg²⁺ not bound by RNA	0	0	0	0.46	no
2wh1	Z158	Mg²⁺ not bound by RNA	0	0	0	0.56	no
2wh1	Z159	Mg²⁺ not bound by RNA	0	0	0	0.36	no
2wh1	Z160	O_ph	1	0.03	0	0.62	no
2wh1	Z161	trans-2O_ph	2	0.18	0.71	0.66	no
2wh1	Z162	Mg²⁺ not bound by RNA	0	0	0	0.60	no
2wh1	Z163	cis-2O_ph	2	0.10	0.17	0.50	no
2wh1	Z164	cis-2O_ph	2	0.08	0.25	0.55	no
2wh1	Z165	poly-nuclear Mg²⁺ site	1	0.01	0	0.34	no
2wh1	Z166	O_b	1	0.02	0	0.82	no
2wh1	Z167	Mg²⁺ not bound by RNA	0	0	0	0.51	no
2wh1	Z168	Mg²⁺ not bound by RNA	0	0	0	0.49	no
2wh1	Z169	Mg²⁺ not bound by RNA	0	0	0	0.63	no
2wh1	Z170	Mg²⁺ bound by non-RNA	3	0.07	0.54	0.48	no
2wh1	Z171	O_b	1	0.02	0	0.53	no
2wh1	Z172	Mg²⁺ not bound by RNA	0	0	0	0.58	no

^# Validation parameters Q_v, Q_s, Q_e are defined in the range of 0 to 1, with 0 indicating poorest reliability and higher value indicating a more reliable site
Q_v measures the agreement of the inner-sphere bond valence summation with the oxidation state of Mg²⁺ (+2)
Q_s measures the geometrical symmetry of the ligands distribution around the Mg²⁺ required for octahedral geometry
Q_e measures the agreement of the isotropic atomic displacement (B) factor and occupancy of the Mg²⁺ compared to those of all atoms in its environment

Abbreviations used for Mg²⁺ "Site type"	Mg²⁺ inner-sphere ligands	Geometry for inner-sphere O_P	Mg²⁺ outer-sphere moieties
Site type used in the classification is a string abbreviation of ligand composition in Mg²⁺ coordination sphere
Abbreviations used for Mg²⁺ "Site type"	O_ph phosphate oxygen (OP1/OP2) O_r ribose oxygen (O2'/O4') or oxygen bridging phosphate and ribose (O3'/O5') O_b nucleobase oxygen N_b nucleobase nitrogen	*cis-* two O_P ligands adopt cis- isoform *trans-* two O_P ligands adopt trans- isoform *fac-* three O_P ligands adopt fac- isoform *mer-* three O_P ligands adopt mer- isoform	P_out phosphate moiety R_out ribose moiety B_out nucleobase moiety
Reference:	Zheng H, Shabalin IG, Handing KB, Bujnicki JM, Minor W. (2015) Magnesium binding architectures in RNA crystal structures: validation, binding preferences, classification, and motif detection. Nucleic Acid Research 43(7):3789-801 [Pubmed].

MgRNA: Classification of Mg2+ binding sites in RNA crystal structures

List of Mg2+ binding sites in structure 2wh1

MgRNA: Classification of Mg²⁺ binding sites in RNA crystal structures

List of Mg²⁺ binding sites in structure 2wh1