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      "atom1_id": "///A/369/OD1",
      "atom2_id": "///A/371/OG",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 200,
      "atom1_serNum": 2009,
      "atom2_serNum": 2021,
      "donAcc_type": "acceptable",
      "distance": 2.829,
      "atom1_id": "///A/369/OD2",
      "atom2_id": "///A/371/OG",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 201,
      "atom1_serNum": 2014,
      "atom2_serNum": 2041,
      "donAcc_type": "standard",
      "distance": 3.047,
      "atom1_id": "///A/370/O",
      "atom2_id": "///A/373/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 202,
      "atom1_serNum": 2044,
      "atom2_serNum": 2400,
      "donAcc_type": "standard",
      "distance": 3.235,
      "atom1_id": "///A/373/O",
      "atom2_id": "///A/412/NH1",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 203,
      "atom1_serNum": 2044,
      "atom2_serNum": 2401,
      "donAcc_type": "standard",
      "distance": 2.982,
      "atom1_id": "///A/373/O",
      "atom2_id": "///A/412/NH2",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 204,
      "atom1_serNum": 2060,
      "atom2_serNum": 2302,
      "donAcc_type": "standard",
      "distance": 3.641,
      "atom1_id": "///A/375/N",
      "atom2_id": "///A/402/OD1",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 205,
      "atom1_serNum": 2077,
      "atom2_serNum": 2284,
      "donAcc_type": "standard",
      "distance": 3.272,
      "atom1_id": "///A/377/N",
      "atom2_id": "///A/400/O",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 206,
      "atom1_serNum": 2080,
      "atom2_serNum": 2281,
      "donAcc_type": "standard",
      "distance": 3.018,
      "atom1_id": "///A/377/O",
      "atom2_id": "///A/400/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 207,
      "atom1_serNum": 2092,
      "atom2_serNum": 2266,
      "donAcc_type": "standard",
      "distance": 3.117,
      "atom1_id": "///A/379/N",
      "atom2_id": "///A/398/O",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 208,
      "atom1_serNum": 2095,
      "atom2_serNum": 2263,
      "donAcc_type": "standard",
      "distance": 3.026,
      "atom1_id": "///A/379/O",
      "atom2_id": "///A/398/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 209,
      "atom1_serNum": 2108,
      "atom2_serNum": 2260,
      "donAcc_type": "acceptable",
      "distance": 2.585,
      "atom1_id": "///A/380/O",
      "atom2_id": "///A/397/OG",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 210,
      "atom1_serNum": 2116,
      "atom2_serNum": 2217,
      "donAcc_type": "standard",
      "distance": 2.858,
      "atom1_id": "///A/382/N",
      "atom2_id": "///A/392/O",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 211,
      "atom1_serNum": 2119,
      "atom2_serNum": 2214,
      "donAcc_type": "standard",
      "distance": 2.740,
      "atom1_id": "///A/382/O",
      "atom2_id": "///A/392/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 212,
      "atom1_serNum": 2141,
      "atom2_serNum": 2200,
      "donAcc_type": "standard",
      "distance": 2.941,
      "atom1_id": "///A/384/N",
      "atom2_id": "///A/390/O",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 213,
      "atom1_serNum": 2144,
      "atom2_serNum": 2197,
      "donAcc_type": "standard",
      "distance": 2.811,
      "atom1_id": "///A/384/O",
      "atom2_id": "///A/390/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 214,
      "atom1_serNum": 2146,
      "atom2_serNum": 2158,
      "donAcc_type": "acceptable",
      "distance": 3.266,
      "atom1_id": "///A/384/OG",
      "atom2_id": "///A/386/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 215,
      "atom1_serNum": 2146,
      "atom2_serNum": 2202,
      "donAcc_type": "acceptable",
      "distance": 3.512,
      "atom1_id": "///A/384/OG",
      "atom2_id": "///A/390/OG",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 216,
      "atom1_serNum": 2149,
      "atom2_serNum": 2155,
      "donAcc_type": "standard",
      "distance": 2.673,
      "atom1_id": "///A/385/N",
      "atom2_id": "///A/385/OD1",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 217,
      "atom1_serNum": 2152,
      "atom2_serNum": 2175,
      "donAcc_type": "standard",
      "distance": 2.686,
      "atom1_id": "///A/385/O",
      "atom2_id": "///A/388/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 218,
      "atom1_serNum": 2161,
      "atom2_serNum": 2202,
      "donAcc_type": "acceptable",
      "distance": 2.661,
      "atom1_id": "///A/386/O",
      "atom2_id": "///A/390/OG",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 219,
      "atom1_serNum": 2178,
      "atom2_serNum": 2189,
      "donAcc_type": "standard",
      "distance": 3.005,
      "atom1_id": "///A/388/O",
      "atom2_id": "///A/389/NH1",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 220,
      "atom1_serNum": 2217,
      "atom2_serNum": 2230,
      "donAcc_type": "standard",
      "distance": 3.284,
      "atom1_id": "///A/392/O",
      "atom2_id": "///A/394/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 221,
      "atom1_serNum": 2230,
      "atom2_serNum": 2260,
      "donAcc_type": "acceptable",
      "distance": 3.090,
      "atom1_id": "///A/394/N",
      "atom2_id": "///A/397/OG",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 222,
      "atom1_serNum": 2310,
      "atom2_serNum": 2323,
      "donAcc_type": "standard",
      "distance": 2.766,
      "atom1_id": "///A/403/O",
      "atom2_id": "///A/405/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 223,
      "atom1_serNum": 2320,
      "atom2_serNum": 2366,
      "donAcc_type": "acceptable",
      "distance": 3.002,
      "atom1_id": "///A/404/OD1",
      "atom2_id": "///A/409/OH",
      "atom_pair": "O:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 224,
      "atom1_serNum": 2326,
      "atom2_serNum": 2349,
      "donAcc_type": "standard",
      "distance": 3.052,
      "atom1_id": "///A/405/O",
      "atom2_id": "///A/408/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 225,
      "atom1_serNum": 2335,
      "atom2_serNum": 2369,
      "donAcc_type": "standard",
      "distance": 3.110,
      "atom1_id": "///A/406/O",
      "atom2_id": "///A/410/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 226,
      "atom1_serNum": 2342,
      "atom2_serNum": 2382,
      "donAcc_type": "standard",
      "distance": 2.787,
      "atom1_id": "///A/407/O",
      "atom2_id": "///A/411/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 227,
      "atom1_serNum": 2352,
      "atom2_serNum": 2391,
      "donAcc_type": "standard",
      "distance": 2.861,
      "atom1_id": "///A/408/O",
      "atom2_id": "///A/412/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 228,
      "atom1_serNum": 2358,
      "atom2_serNum": 2408,
      "donAcc_type": "standard",
      "distance": 2.897,
      "atom1_id": "///A/409/O",
      "atom2_id": "///A/413/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 229,
      "atom1_serNum": 2372,
      "atom2_serNum": 2413,
      "donAcc_type": "standard",
      "distance": 3.061,
      "atom1_id": "///A/410/O",
      "atom2_id": "///A/414/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 230,
      "atom1_serNum": 2385,
      "atom2_serNum": 2429,
      "donAcc_type": "standard",
      "distance": 2.864,
      "atom1_id": "///A/411/O",
      "atom2_id": "///A/415/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 231,
      "atom1_serNum": 2394,
      "atom2_serNum": 2441,
      "donAcc_type": "standard",
      "distance": 2.765,
      "atom1_id": "///A/412/O",
      "atom2_id": "///A/416/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 232,
      "atom1_serNum": 2416,
      "atom2_serNum": 2450,
      "donAcc_type": "standard",
      "distance": 2.820,
      "atom1_id": "///A/414/O",
      "atom2_id": "///A/417/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 233,
      "atom1_serNum": 2416,
      "atom2_serNum": 2456,
      "donAcc_type": "standard",
      "distance": 2.595,
      "atom1_id": "///A/414/O",
      "atom2_id": "///A/418/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 234,
      "atom1_serNum": 2416,
      "atom2_serNum": 2466,
      "donAcc_type": "standard",
      "distance": 3.235,
      "atom1_id": "///A/414/O",
      "atom2_id": "///A/419/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 235,
      "atom1_serNum": 2421,
      "atom2_serNum": 2463,
      "donAcc_type": "standard",
      "distance": 3.010,
      "atom1_id": "///A/414/NE1",
      "atom2_id": "///A/418/OE1",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    },
    {
      "index": 236,
      "atom1_serNum": 2432,
      "atom2_serNum": 2471,
      "donAcc_type": "standard",
      "distance": 2.818,
      "atom1_id": "///A/415/O",
      "atom2_id": "///A/420/N",
      "atom_pair": "O:N",
      "residue_pair": "aa:aa"
    },
    {
      "index": 237,
      "atom1_serNum": 2471,
      "atom2_serNum": 2478,
      "donAcc_type": "standard",
      "distance": 2.757,
      "atom1_id": "///A/420/N",
      "atom2_id": "///A/420/OE1",
      "atom_pair": "N:O",
      "residue_pair": "aa:aa"
    }
  ],
  "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": "1jmc",
    "num_aaChains": 1,
    "aaChains": "A=238",
    "num_naChains": 1,
    "naChains": "B=8",
    "num_atoms": 2751,
    "num_waters": 90,
    "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": 10,
    "auxfiles": [
      {
        "index": 1,
        "name": "dssr-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 2,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 3,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 4,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 5,
        "name": "dssr-splays.pdb",
        "desc": "an ensemble of splayed-apart units"
      },
      {
        "index": 6,
        "name": "dssr-stacks.pdb",
        "desc": "an ensemble of base stacks"
      },
      {
        "index": 7,
        "name": "dssr-rotmat.txt",
        "desc": "position vector and rotation matrix"
      },
      {
        "index": 8,
        "name": "dssr-viewV.pdb",
        "desc": "vertical view of the principal moment of inertia"
      },
      {
        "index": 9,
        "name": "dssr-viewH.pdb",
        "desc": "horizontal view of the principal moment of inertia"
      },
      {
        "index": 10,
        "name": "dssr-viewT.pdb",
        "desc": "top view of the principal moment of inertia"
      }
    ],
    "time_used": "999"
  }
}
