MgRNA: Classification of Mg2+ binding sites in RNA crystal structures Back to Classification Home Download this subset in: CSV, XML, JSON Representative site 3df4:B3602, See in JSmolClick on the image to toggle views Site type: Pout·Rout·2Bout Schematic drawing for Pout·Rout·2Bout List of all 93 Mg2+ binding sites with the site type Pout·Rout·2Bout 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 4 | « Previous | Next » | 1 | 2 | 3 | 4

Mg2+ ion Site type Validation parameters PDB ID Mg2+ ID Coordination Number Qv # Qs # Qe # benchmark dataset 4tom A3081 Pout·Rout·2Bout 6   0.75   0.98  0 no 4ji8 A1939 Pout·Rout·2Bout 6   1.00   0.96   0.31 no 4ji7 A1991 Pout·Rout·2Bout 6   0.94   0.99   0.31 no 4ji6 A1910 Pout·Rout·2Bout 6   0.96   0.97   0.34 no 4kj1 A3128 Pout·Rout·2Bout 3   0.33   0.22   0.35 no 4dr7 A1853 Pout·Rout·2Bout 6   0.92   0.98   0.35 no 4kix A3082 Pout·Rout·2Bout 3   0.18   0.22   0.37 no 4tpd A3061 Pout·Rout·2Bout 4   0.67   0.68   0.40 no 4kj7 A3081 Pout·Rout·2Bout 5   0.58   0.49   0.44 no 4ji3 A1781 Pout·Rout·2Bout 3   0.47   0.68   0.51 no 3ofq A3015 Pout·Rout·2Bout 6   0.74   0.98   0.53 yes 1yjw 78107 Pout·Rout·2Bout 5   0.58   0.59   0.53 no 3v27 A3580 Pout·Rout·2Bout 4   0.48   0.92   0.60 no 4dv1 A1822 Pout·Rout·2Bout 5   0.80   0.80   0.61 yes 4kix A3017 Pout·Rout·2Bout 4   0.77   0.42   0.63 no 3v2f A3292 Pout·Rout·2Bout 4   0.49   0.62   0.66 no 3v2f A3597 Pout·Rout·2Bout 3   0.36   0.66   0.66 no 1q82 A8076 Pout·Rout·2Bout 5   0.63   0.67   0.66 yes 1kqs 08076 Pout·Rout·2Bout 6   0.67   0.85   0.66 yes 1q81 A8076 Pout·Rout·2Bout 6   0.45   0.44   0.68 no 1vqp 08076 Pout·Rout·2Bout 5   0.29   0.61   0.69 no 1n8r A8076 Pout·Rout·2Bout 6   0.72   0.70   0.69 yes 1q86 A8076 Pout·Rout·2Bout 6   0.43   0.83   0.69 no 1vql 08068 Pout·Rout·2Bout 4   0.47   0.59   0.69 no 1nji A8076 Pout·Rout·2Bout 6   0.59   0.82   0.70 yes

^# 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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