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      "splay_distance": 4.004,
      "splay_ratio": 0.212,
      "d22": 4.189,
      "d64": 4.088,
      "eta": 164.371,
      "theta": -148.959,
      "eta_prime": 171.762,
      "theta_prime": -149.392,
      "eta_base": -173.075,
      "theta_base": -128.931,
      "v0": -0.234,
      "v1": -22.294,
      "v2": 34.205,
      "v3": -35.679,
      "v4": 23.126,
      "amplitude": 36.229,
      "phase_angle": 19.241,
      "puckering": "C3'-endo",
      "sugar_class": "~C3'-endo",
      "bin": "33p",
      "cluster": "1a",
      "suiteness": 0.629,
      "filter_rmsd": 0.061,
      "frame": {
        "rmsd": 0.024,
        "origin": [
          41.235,
          48.654,
          36.660
        ],
        "x_axis": [
          -0.515,
          -0.757,
          -0.402
        ],
        "y_axis": [
          -0.836,
          0.547,
          0.041
        ],
        "z_axis": [
          0.189,
          0.357,
          -0.915
        ],
        "quaternion": [
          0.171,
          -0.462,
          0.863,
          0.115
        ]
      }
    },
    {
      "index": 17,
      "index_chain": 17,
      "chain_name": "A",
      "nt_resnum": 17,
      "nt_name": "U",
      "nt_code": "U",
      "nt_id": "///A/17",
      "linked_nts": [
        "///A/16",
        "///A/18"
      ],
      "nt_type": "RNA",
      "dbn": ")",
      "summary": "anti,~C3'-endo,BI,canonical,non-pair-contact,helix,stem",
      "alpha": -76.695,
      "beta": 176.880,
      "gamma": 60.327,
      "delta": 78.935,
      "epsilon": -154.763,
      "zeta": -68.252,
      "epsilon_zeta": -86.512,
      "bb_type": "BI",
      "chi": -153.714,
      "glyco_bond": "anti",
      "C5prime_xyz": [
        -1.721,
        8.824,
        -0.012
      ],
      "P_xyz": [
        0.758,
        9.597,
        0.085
      ],
      "form": "A",
      "ssZp": 3.937,
      "Dp": 4.474,
      "splay_angle": 20.658,
      "splay_distance": 3.427,
      "splay_ratio": 0.182,
      "d22": 4.171,
      "d64": 4.190,
      "eta": 166.775,
      "theta": -145.434,
      "eta_prime": 178.339,
      "theta_prime": -145.302,
      "eta_base": -149.967,
      "theta_base": -121.888,
      "v0": 1.877,
      "v1": -24.023,
      "v2": 35.132,
      "v3": -35.544,
      "v4": 21.553,
      "amplitude": 36.565,
      "phase_angle": 16.094,
      "puckering": "C3'-endo",
      "sugar_class": "~C3'-endo",
      "bin": "33p",
      "cluster": "1a",
      "suiteness": 0.781,
      "filter_rmsd": 0.097,
      "frame": {
        "rmsd": 0.028,
        "origin": [
          42.330,
          48.819,
          32.812
        ],
        "x_axis": [
          -0.860,
          -0.511,
          -0.012
        ],
        "y_axis": [
          -0.503,
          0.843,
          0.191
        ],
        "z_axis": [
          -0.087,
          0.170,
          -0.982
        ],
        "quaternion": [
          -0.019,
          -0.264,
          0.960,
          0.094
        ]
      }
    },
    {
      "index": 18,
      "index_chain": 18,
      "chain_name": "A",
      "nt_resnum": 18,
      "nt_name": "C",
      "nt_code": "C",
      "nt_id": "///A/18",
      "linked_nts": [
        "///A/17",
        null
      ],
      "nt_type": "RNA",
      "dbn": ")",
      "summary": "anti,~C3'-endo,canonical,non-pair-contact,helix-end,stem-end",
      "alpha": -76.390,
      "beta": 174.981,
      "gamma": 60.272,
      "delta": 83.681,
      "epsilon": null,
      "zeta": null,
      "epsilon_zeta": null,
      "bb_type": "--",
      "chi": -146.819,
      "glyco_bond": "anti",
      "C5prime_xyz": [
        -1.738,
        8.861,
        -0.132
      ],
      "P_xyz": [
        0.691,
        9.678,
        -0.467
      ],
      "form": "-",
      "ssZp": null,
      "Dp": null,
      "splay_angle": null,
      "splay_distance": null,
      "splay_ratio": null,
      "d22": null,
      "d64": null,
      "eta": null,
      "theta": null,
      "eta_prime": null,
      "theta_prime": null,
      "eta_base": null,
      "theta_base": null,
      "v0": -3.907,
      "v1": -16.696,
      "v2": 29.152,
      "v3": -32.643,
      "v4": 23.161,
      "amplitude": 32.329,
      "phase_angle": 25.615,
      "puckering": "C3'-endo",
      "sugar_class": "~C3'-endo",
      "bin": "33p",
      "cluster": "1a",
      "suiteness": 0.818,
      "filter_rmsd": 0.064,
      "frame": {
        "rmsd": 0.029,
        "origin": [
          41.771,
          47.882,
          29.563
        ],
        "x_axis": [
          -0.968,
          -0.051,
          0.246
        ],
        "y_axis": [
          -0.046,
          0.999,
          0.027
        ],
        "z_axis": [
          -0.247,
          0.015,
          -0.969
        ],
        "quaternion": [
          -0.124,
          -0.024,
          0.992,
          0.010
        ]
      }
    }
  ],
  "num_hbonds": 23,
  "hbonds": [
    {
      "index": 1,
      "atom1_serNum": 15,
      "atom2_serNum": 569,
      "donAcc_type": "standard",
      "distance": 2.826,
      "atom1_id": "///A/1/O6",
      "atom2_id": "///A/18/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 2,
      "atom1_serNum": 16,
      "atom2_serNum": 567,
      "donAcc_type": "standard",
      "distance": 2.890,
      "atom1_id": "///A/1/N1",
      "atom2_id": "///A/18/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 3,
      "atom1_serNum": 18,
      "atom2_serNum": 566,
      "donAcc_type": "standard",
      "distance": 2.804,
      "atom1_id": "///A/1/N2",
      "atom2_id": "///A/18/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 4,
      "atom1_serNum": 50,
      "atom2_serNum": 539,
      "donAcc_type": "standard",
      "distance": 2.876,
      "atom1_id": "///A/2/N6",
      "atom2_id": "///A/17/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 5,
      "atom1_serNum": 51,
      "atom2_serNum": 537,
      "donAcc_type": "standard",
      "distance": 2.882,
      "atom1_id": "///A/2/N1",
      "atom2_id": "///A/17/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 6,
      "atom1_serNum": 83,
      "atom2_serNum": 508,
      "donAcc_type": "standard",
      "distance": 2.886,
      "atom1_id": "///A/3/O6",
      "atom2_id": "///A/16/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 7,
      "atom1_serNum": 84,
      "atom2_serNum": 506,
      "donAcc_type": "standard",
      "distance": 2.889,
      "atom1_id": "///A/3/N1",
      "atom2_id": "///A/16/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 8,
      "atom1_serNum": 86,
      "atom2_serNum": 505,
      "donAcc_type": "standard",
      "distance": 2.806,
      "atom1_id": "///A/3/N2",
      "atom2_id": "///A/16/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 9,
      "atom1_serNum": 110,
      "atom2_serNum": 137,
      "donAcc_type": "acceptable",
      "distance": 2.755,
      "atom1_id": "///A/4/O2'",
      "atom2_id": "///A/5/O5'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 10,
      "atom1_serNum": 117,
      "atom2_serNum": 476,
      "donAcc_type": "standard",
      "distance": 2.886,
      "atom1_id": "///A/4/O6",
      "atom2_id": "///A/15/N3",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 11,
      "atom1_serNum": 118,
      "atom2_serNum": 475,
      "donAcc_type": "standard",
      "distance": 2.783,
      "atom1_id": "///A/4/N1",
      "atom2_id": "///A/15/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 12,
      "atom1_serNum": 149,
      "atom2_serNum": 446,
      "donAcc_type": "standard",
      "distance": 2.945,
      "atom1_id": "///A/5/N3",
      "atom2_id": "///A/14/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 13,
      "atom1_serNum": 151,
      "atom2_serNum": 445,
      "donAcc_type": "standard",
      "distance": 2.890,
      "atom1_id": "///A/5/O4",
      "atom2_id": "///A/14/N6",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 14,
      "atom1_serNum": 174,
      "atom2_serNum": 198,
      "donAcc_type": "acceptable",
      "distance": 2.957,
      "atom1_id": "///A/6/O2'",
      "atom2_id": "///A/7/O5'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 15,
      "atom1_serNum": 174,
      "atom2_serNum": 201,
      "donAcc_type": "acceptable",
      "distance": 3.048,
      "atom1_id": "///A/6/O2'",
      "atom2_id": "///A/7/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 16,
      "atom1_serNum": 178,
      "atom2_serNum": 414,
      "donAcc_type": "standard",
      "distance": 2.858,
      "atom1_id": "///A/6/O2",
      "atom2_id": "///A/13/N2",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 17,
      "atom1_serNum": 179,
      "atom2_serNum": 412,
      "donAcc_type": "standard",
      "distance": 2.844,
      "atom1_id": "///A/6/N3",
      "atom2_id": "///A/13/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 18,
      "atom1_serNum": 181,
      "atom2_serNum": 411,
      "donAcc_type": "standard",
      "distance": 2.874,
      "atom1_id": "///A/6/N4",
      "atom2_id": "///A/13/O6",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 19,
      "atom1_serNum": 303,
      "atom2_serNum": 380,
      "donAcc_type": "standard",
      "distance": 3.199,
      "atom1_id": "///A/10/O4'",
      "atom2_id": "///A/12/N2",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 20,
      "atom1_serNum": 317,
      "atom2_serNum": 378,
      "donAcc_type": "standard",
      "distance": 2.946,
      "atom1_id": "///A/10/N3",
      "atom2_id": "///A/12/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 21,
      "atom1_serNum": 404,
      "atom2_serNum": 431,
      "donAcc_type": "acceptable",
      "distance": 2.753,
      "atom1_id": "///A/13/O2'",
      "atom2_id": "///A/14/O5'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 22,
      "atom1_serNum": 438,
      "atom2_serNum": 467,
      "donAcc_type": "acceptable",
      "distance": 3.120,
      "atom1_id": "///A/14/O2'",
      "atom2_id": "///A/15/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 23,
      "atom1_serNum": 471,
      "atom2_serNum": 497,
      "donAcc_type": "acceptable",
      "distance": 2.944,
      "atom1_id": "///A/15/O2'",
      "atom2_id": "///A/16/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    }
  ],
  "refCoords": {
    "purine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -0.5000   0.4000",
      "    3 N      -2.2500  -0.5000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500  -0.5000   0.4000",
      "    7 C       1.2500  -0.5000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -0.5000   0.4000",
      "   11 C      -2.2500  -0.5000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "pyrimidine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500   1.0000   0.4000",
      "    3 N      -2.2500   1.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500   1.0000   0.4000",
      "    7 C       1.2500   1.0000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500   1.0000   0.4000",
      "   11 C      -2.2500   1.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "wc_pair": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -5.0000   0.4000",
      "    3 N      -2.2500  -5.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       2.2500   5.0000   0.4000",
      "    6 C       2.2500  -5.0000   0.4000",
      "    7 C       2.2500  -5.0000  -0.4000",
      "    8 C       2.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -5.0000   0.4000",
      "   11 C      -2.2500  -5.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ]
  },
  "metadata": {
    "license": "http://innovation.columbia.edu/technologies/CU20391",
    "url": "http://x3dna.org/",
    "url_alt": "http://home.x3dna.org/",
    "forum": "http://forum.x3dna.org/",
    "citation": "Lu et al. (2015). 'DSSR: an integrated software tool for dissecting the spatial structure of RNA.' Nucleic Acids Res., 43(21):e142 [doi:10.1093/nar/gkv716].",
    "str_id": "2gvo",
    "num_naChains": 1,
    "naChains": "A=18",
    "num_atoms": 583,
    "num_waters": 0,
    "num_notes": 52,
    "notes": [
      {
        "Aminors": "A-minor interactions (including types I and II)"
      },
      {
        "Cstem_index": "stem index of the 'Canonical' helix in k-turn"
      },
      {
        "Cstem_pair": "Cstem bp delineating the k-turn internal loop"
      },
      {
        "Dp": "perpendicular distance of the 3' P atom to the glycosidic bond"
      },
      {
        "GA_pair": "sheared G-A pair in k-turn"
      },
      {
        "HtypePknot": "H-type pseudoknot"
      },
      {
        "Kturn": "kink-turn (k-turn)"
      },
      {
        "LW": "Leontis-Westhof"
      },
      {
        "NCstem_index": "stem index of the 'Non-Canonical' helix in k-turn"
      },
      {
        "NCstem_pair": "NCstem bp delineating the k-turn internal loop"
      },
      {
        "Uturn": "U-turn of the UNR- or GNRA-type"
      },
      {
        "aa": "amino acid"
      },
      {
        "atom_pair": "symbols of the two atoms involved in an H-bond"
      },
      {
        "auxfiles": "auxiliary files"
      },
      {
        "glyco_bond": "conformation of base related to sugar (syn or anti)"
      },
      {
        "bb_type": "backbone conformation, BI or BII"
      },
      {
        "bending_angle": "angle between two helical axes"
      },
      {
        "bp": "base pair"
      },
      {
        "bseq": "base sequence in one-letter code"
      },
      {
        "bulge": "bulge loop"
      },
      {
        "coaxStacks": "coaxial stacking of stems within a helix"
      },
      {
        "dbn": "dot bracket notation"
      },
      {
        "desc": "description"
      },
      {
        "donAcc_type": "donor/acceptor type of the atom pair in an H-bond"
      },
      {
        "epsilon_zeta": "difference between epsilon and zeta torsion angles"
      },
      {
        "hairpin": "hairpin loop"
      },
      {
        "hbond": "hydrogen bond (H-bond)"
      },
      {
        "helix": "defined by base-stacking interactions, regardless of bp type and backbone connectivity"
      },
      {
        "id": "identifier"
      },
      {
        "iloop": "internal loop"
      },
      {
        "index": "serial number"
      },
      {
        "isoCanonPairs": "isolated canonical pairs"
      },
      {
        "junction": "(multi-branched) junction loop"
      },
      {
        "kissingLoop": "kissing loop"
      },
      {
        "multiplet": "3+ bases in a coplanar geometry"
      },
      {
        "na": "nucleic acid"
      },
      {
        "nonPair": "two nts not forming a pair, but with H-bonding/stacking interactions"
      },
      {
        "nonStack": "nucleotide not involved in stacking interactions"
      },
      {
        "nt": "nucleotide"
      },
      {
        "num": "number"
      },
      {
        "oArea": "overlap areas between two bases, including exocyclic atoms"
      },
      {
        "oArea_ring": "overlap areas between two bases, including only ring atoms"
      },
      {
        "phosContacts": "H-bonding and atom-capping interactions involving a phosphate"
      },
      {
        "residue_pair": "types of the two residues involved in an H-bond"
      },
      {
        "rmsd": "root-mean-squares deviation"
      },
      {
        "serNum": "serial number"
      },
      {
        "ssSegments": "single-stranded segments not involved in loops"
      },
      {
        "ssZp": "Z-coordinate of the 3' phosphorus atom with reference to the 5' base plane"
      },
      {
        "sstr": "secondary structure in dbn"
      },
      {
        "stem": "helix consisting of only canonical pairs, with a continuous backbone"
      },
      {
        "str_id": "structure identifier, derived from inpfile with extension removed"
      },
      {
        "vert_dist": "vertical distance from an atom to a base plane"
      }
    ],
    "num_auxfiles": 15,
    "auxfiles": [
      {
        "index": 1,
        "name": "dssr-pairs.pdb",
        "desc": "an ensemble of base pairs"
      },
      {
        "index": 2,
        "name": "dssr-stems.pdb",
        "desc": "an ensemble of stems"
      },
      {
        "index": 3,
        "name": "dssr-helices.pdb",
        "desc": "an ensemble of helices (coaxial stacking)"
      },
      {
        "index": 4,
        "name": "dssr-hairpins.pdb",
        "desc": "an ensemble of hairpin loops"
      },
      {
        "index": 5,
        "name": "dssr-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 6,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 7,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 8,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 9,
        "name": "dssr-splays.pdb",
        "desc": "an ensemble of splayed-apart units"
      },
      {
        "index": 10,
        "name": "dssr-stacks.pdb",
        "desc": "an ensemble of base stacks"
      },
      {
        "index": 11,
        "name": "dssr-atom2bases.pdb",
        "desc": "an ensemble of atom-base stacking interactions"
      },
      {
        "index": 12,
        "name": "dssr-rotmat.txt",
        "desc": "position vector and rotation matrix"
      },
      {
        "index": 13,
        "name": "dssr-viewV.pdb",
        "desc": "vertical view of the principal moment of inertia"
      },
      {
        "index": 14,
        "name": "dssr-viewH.pdb",
        "desc": "horizontal view of the principal moment of inertia"
      },
      {
        "index": 15,
        "name": "dssr-viewT.pdb",
        "desc": "top view of the principal moment of inertia"
      }
    ],
    "time_used": "999"
  }
}
