MgRNA: Classification of Mg2+ binding sites in RNA crystal structures Back to Classification Home Download this subset in: CSV, XML, JSON Representative site 1vs7:A1593, See in JSmolClick on the image to toggle views Site type: 2Pout Schematic drawing for 2Pout List of all 638 Mg2+ binding sites with the site type 2Pout in RNA crystal structures 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 #", "PDB ID" or "Mg2+ ID" Page 1 of 26 | « Previous | Next » | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

Mg2+ ion Site type Validation parameters PDB ID Mg2+ ID Coordination Number Qv # Qs # Qe # benchmark dataset 1jj2 B8055 2Pout 6   0.68   0.69   0.93 yes 1k73 D8055 2Pout 6   0.78   0.69   0.72 yes 1k8a D8055 2Pout 6   0.41   0.57   0.73 no 1k9m D8055 2Pout 6   0.28   0.73   0.72 no 1k9m A8115 2Pout 6   0.57   0.42   0.46 no 1kc8 A8055 2Pout 5   0.33   0.67   0.75 no 1kd1 A8055 2Pout 6   0.62   0.43   0.96 no 1kqs 08055 2Pout 6   0.32   0.71   0.74 no 1lnt A102 2Pout 4   0.97   0.78   0.29 no 1m1k D8055 2Pout 6   0.87   0.70   0.92 yes 1m1k A8115 2Pout 6   0.61   0.61   0.48 no 1m90 A8055 2Pout 6   0.81   0.69   0.98 yes 1n8r D8055 2Pout 5   0.27   0.57   0.74 no 1nji D8055 2Pout 6   0.91   0.59   0.92 no 1q7y A8055 2Pout 6   0.66   0.52   0.63 no 1q7y A8115 2Pout 4   0.45   0.54   0.60 no 1q81 A8115 2Pout 4   0.34   0.64   0.37 no 1q81 D8055 2Pout 6   0.27   0.63   0.94 no 1q86 D8055 2Pout 6   0.74   0.68   0.67 yes 1qvf B8055 2Pout 6   0.81   0.69   0.72 yes 1qvf 08115 2Pout 6   0.60   0.64   0.63 yes 1qvg 08055 2Pout 6   0.74   0.67   0.88 yes 1s72 B8055 2Pout 6   0.64   0.64   0.89 yes 1vq4 B8055 2Pout 6   0.63   0.90   0.84 yes 1vq5 08115 2Pout 5   0.27   0.57   0.89 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

Site type used in the classification is a string abbreviation of ligand composition in Mg2+ coordination sphere
Abbreviations used for Mg2+ "Site type"	Mg2+ inner-sphere ligands	Geometry for inner-sphere OP	Mg2+ outer-sphere moieties
	Oph phosphate oxygen (OP1/OP2) Or ribose oxygen (O2'/O4')      or oxygen bridging phosphate and ribose (O3'/O5') Ob nucleobase oxygen      Nb nucleobase nitrogen	cis- two OP ligands adopt cis- isoform trans- two OP ligands adopt trans- isoform fac- three OP ligands adopt fac- isoform mer- three OP ligands adopt mer- isoform	Pout phosphate moiety Rout ribose moiety Bout 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].

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