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      "v2": 4.740,
      "v3": -26.996,
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      "delta": 120.907,
      "epsilon": -88.236,
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      "epsilon_zeta": 126.092,
      "bb_type": "BII",
      "chi": -69.815,
      "glyco_bond": "--",
      "C5prime_xyz": [
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        8.162,
        -4.788
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      "splay_distance": 3.863,
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      "eta": -174.468,
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      "theta_prime": 148.055,
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      "amplitude": 47.740,
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      "sugar_class": "~C2'-endo",
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    {
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        "///B/11"
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      "d64": null,
      "eta": 165.887,
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      "eta_prime": 174.095,
      "theta_prime": -156.712,
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      "theta_base": -148.187,
      "v0": -32.711,
      "v1": 14.416,
      "v2": 7.433,
      "v3": -27.054,
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      "amplitude": 37.210,
      "phase_angle": 78.477,
      "puckering": "O4'-endo",
      "sugar_class": "--",
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      "cluster": "!!",
      "suiteness": 0.000,
      "filter_rmsd": 0.052,
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        "origin": [
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        ],
        "x_axis": [
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        "y_axis": [
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        "quaternion": [
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    },
    {
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      "nt_name": "DA",
      "nt_code": "A",
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      "linked_nts": [
        "///B/10",
        "///B/12"
      ],
      "nt_type": "DNA",
      "dbn": ")",
      "summary": "anti,~C2'-endo,BI,canonical,non-pair-contact,helix,stem",
      "alpha": -166.086,
      "beta": 143.934,
      "gamma": -175.139,
      "delta": 151.134,
      "epsilon": 177.600,
      "zeta": -84.226,
      "epsilon_zeta": -98.174,
      "bb_type": "BI",
      "chi": -107.249,
      "glyco_bond": "anti",
      "C5prime_xyz": [
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        8.265,
        -1.490
      ],
      "P_xyz": [
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        -3.882
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      "form": ".",
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      "Dp": 1.964,
      "splay_angle": 18.464,
      "splay_distance": 3.644,
      "splay_ratio": 0.181,
      "d22": null,
      "d64": null,
      "eta": -132.952,
      "theta": 174.077,
      "eta_prime": -137.615,
      "theta_prime": -177.679,
      "eta_base": -135.267,
      "theta_base": -135.784,
      "v0": -11.264,
      "v1": 31.887,
      "v2": -38.580,
      "v3": 33.406,
      "v4": -14.201,
      "amplitude": 38.608,
      "phase_angle": 182.149,
      "puckering": "C3'-exo",
      "sugar_class": "~C2'-endo",
      "bin": "32t",
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      "suiteness": 0.132,
      "filter_rmsd": 0.052,
      "frame": {
        "rmsd": 0.027,
        "origin": [
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        "x_axis": [
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        "y_axis": [
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        "z_axis": [
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        "quaternion": [
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      }
    },
    {
      "index": 12,
      "index_chain": 6,
      "chain_name": "B",
      "nt_resnum": 12,
      "nt_name": "DT",
      "nt_code": "T",
      "nt_id": "///B/12",
      "linked_nts": [
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        null
      ],
      "nt_type": "DNA",
      "dbn": ")",
      "summary": "anti,~C2'-endo,canonical,non-pair-contact,helix-end,stem-end",
      "alpha": -73.590,
      "beta": 179.886,
      "gamma": 49.883,
      "delta": 110.534,
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      "zeta": null,
      "epsilon_zeta": null,
      "bb_type": "--",
      "chi": -119.048,
      "glyco_bond": "anti",
      "C5prime_xyz": [
        -3.552,
        8.395,
        -1.602
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      "P_xyz": [
        -2.075,
        10.554,
        -1.890
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      "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": -44.595,
      "v1": 38.500,
      "v2": -18.635,
      "v3": -6.881,
      "v4": 32.416,
      "amplitude": 43.917,
      "phase_angle": 115.108,
      "puckering": "C1'-exo",
      "sugar_class": "~C2'-endo",
      "bin": "trig",
      "cluster": "!!",
      "suiteness": 0.000,
      "filter_rmsd": 0.095,
      "frame": {
        "rmsd": 0.029,
        "origin": [
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        ],
        "x_axis": [
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        "y_axis": [
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        ],
        "z_axis": [
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        ],
        "quaternion": [
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      }
    }
  ],
  "num_hbonds": 18,
  "hbonds": [
    {
      "index": 1,
      "atom1_serNum": 14,
      "atom2_serNum": 365,
      "donAcc_type": "standard",
      "distance": 2.936,
      "atom1_id": "///A/1/N6",
      "atom2_id": "///B/12/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 2,
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      "atom2_serNum": 363,
      "donAcc_type": "standard",
      "distance": 2.922,
      "atom1_id": "///A/1/N1",
      "atom2_id": "///B/12/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 3,
      "atom1_serNum": 45,
      "atom2_serNum": 334,
      "donAcc_type": "standard",
      "distance": 2.913,
      "atom1_id": "///A/2/N3",
      "atom2_id": "///B/11/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 4,
      "atom1_serNum": 47,
      "atom2_serNum": 333,
      "donAcc_type": "standard",
      "distance": 2.897,
      "atom1_id": "///A/2/O4",
      "atom2_id": "///B/11/N6",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 5,
      "atom1_serNum": 79,
      "atom2_serNum": 303,
      "donAcc_type": "standard",
      "distance": 2.930,
      "atom1_id": "///A/3/O6",
      "atom2_id": "///B/10/N4",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 6,
      "atom1_serNum": 79,
      "atom2_serNum": 403,
      "donAcc_type": "unknown",
      "distance": 2.738,
      "atom1_id": "///A/3/O6",
      "atom2_id": "///A/13/NG",
      "atom_pair": "O:N",
      "residue_pair": "nt:ligand"
    },
    {
      "index": 7,
      "atom1_serNum": 80,
      "atom2_serNum": 301,
      "donAcc_type": "standard",
      "distance": 2.942,
      "atom1_id": "///A/3/N1",
      "atom2_id": "///B/10/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 8,
      "atom1_serNum": 82,
      "atom2_serNum": 300,
      "donAcc_type": "standard",
      "distance": 2.815,
      "atom1_id": "///A/3/N2",
      "atom2_id": "///B/10/O2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 9,
      "atom1_serNum": 109,
      "atom2_serNum": 273,
      "donAcc_type": "standard",
      "distance": 2.784,
      "atom1_id": "///A/4/O2",
      "atom2_id": "///B/9/N2",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 10,
      "atom1_serNum": 110,
      "atom2_serNum": 271,
      "donAcc_type": "standard",
      "distance": 2.913,
      "atom1_id": "///A/4/N3",
      "atom2_id": "///B/9/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 11,
      "atom1_serNum": 112,
      "atom2_serNum": 270,
      "donAcc_type": "standard",
      "distance": 2.937,
      "atom1_id": "///A/4/N4",
      "atom2_id": "///B/9/O6",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 12,
      "atom1_serNum": 142,
      "atom2_serNum": 238,
      "donAcc_type": "standard",
      "distance": 2.979,
      "atom1_id": "///A/5/N6",
      "atom2_id": "///B/8/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 13,
      "atom1_serNum": 143,
      "atom2_serNum": 236,
      "donAcc_type": "standard",
      "distance": 2.886,
      "atom1_id": "///A/5/N1",
      "atom2_id": "///B/8/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 14,
      "atom1_serNum": 172,
      "atom2_serNum": 206,
      "donAcc_type": "standard",
      "distance": 2.942,
      "atom1_id": "///A/6/N3",
      "atom2_id": "///B/7/N1",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 15,
      "atom1_serNum": 174,
      "atom2_serNum": 205,
      "donAcc_type": "standard",
      "distance": 2.950,
      "atom1_id": "///A/6/O4",
      "atom2_id": "///B/7/N6",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 16,
      "atom1_serNum": 270,
      "atom2_serNum": 425,
      "donAcc_type": "unknown",
      "distance": 2.818,
      "atom1_id": "///B/9/O6",
      "atom2_id": "///A/13/NG'",
      "atom_pair": "O:N",
      "residue_pair": "nt:ligand"
    },
    {
      "index": 17,
      "atom1_serNum": 390,
      "atom2_serNum": 400,
      "donAcc_type": "unknown",
      "distance": 2.715,
      "atom1_id": "///A/13/N10",
      "atom2_id": "///A/13/N",
      "atom_pair": "N:N",
      "residue_pair": "ligand:ligand"
    },
    {
      "index": 18,
      "atom1_serNum": 405,
      "atom2_serNum": 416,
      "donAcc_type": "unknown",
      "distance": 2.704,
      "atom1_id": "///A/13/N'",
      "atom2_id": "///A/13/NAX",
      "atom_pair": "N:N",
      "residue_pair": "ligand:ligand"
    }
  ],
  "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": "https://x3dna.org/",
    "web_dssr": "https://web.x3dna-dssr.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": "4bzt",
    "num_naChains": 2,
    "naChains": "A=7,B=6",
    "num_atoms": 460,
    "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": 11,
    "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-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 5,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 6,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 7,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 8,
        "name": "dssr-rotmat.txt",
        "desc": "position vector and rotation matrix"
      },
      {
        "index": 9,
        "name": "dssr-viewV.pdb",
        "desc": "vertical view of the principal moment of inertia"
      },
      {
        "index": 10,
        "name": "dssr-viewH.pdb",
        "desc": "horizontal view of the principal moment of inertia"
      },
      {
        "index": 11,
        "name": "dssr-viewT.pdb",
        "desc": "top view of the principal moment of inertia"
      }
    ],
    "time_used": "999"
  }
}
