Monomer Structural Features

Structural properties at the monomer level are described in the categories STRUCT_MON_DETAILS, STRUCT_MON_PROT, STRUCT_MON_NUCL, and STRUCT_MON_PROT_CIS. These categories contain features such as: backbone torsion angles, isotropic temperature factors, real space R factors, and real space correlation coefficients. Precise details about the calculation of the latter quantities may be specified in the STRUCT_MON_DETAILS category. The structural features described in these categories can be identified using standard mmCIF monomer labels and/or an alternative nomenclature preferred by the author. This is illustrated in the following diagram.

An abbreviated example showing showing the monomer properties for a single protein residue.

_struct_mon_prot.comp_id        ARG
_struct_mon_prot.seq_id         35
_struct_mon_prot.asym_id        A
_struct_mon_prot.alt_id         .
_struct_mon_prot.chi1         -67.9
_struct_mon_prot.chi2        -174.7
_struct_mon_prot.chi3         -67.7
_struct_mon_prot.chi4         -86.3
_struct_mon_prot.chi5           4.2
_struct_mon_prot.RSCC_all       0.90
_struct_mon_prot.RSR_all        0.18
_struct_mon_prot.mean_B_all     30.0
_struct_mon_prot.mean_B_main    25.0
_struct_mon_prot.mean_B_side    35.1
_struct_mon_prot.omega         180.1
_struct_mon_prot.phi           -60.3
_struct_mon_prot.psi           -46.0

This is another example which shows an abbreviated list of the nucleotide backbone conformation angles for a B-DNA duplex structure (NDB BDL028 Berman et al. 1991).

loop_
_struct_mon_nucl.label_comp_id
_struct_mon_nucl.label_seq_id
_struct_mon_nucl.label_asym_id
_struct_mon_nucl.label_alt_id
_struct_mon_nucl.alpha
_struct_mon_nucl.beta 
_struct_mon_nucl.gamma
_struct_mon_nucl.delta
_struct_mon_nucl.epsilon
_struct_mon_nucl.zeta
  C  1 A .      .      .   29.9  131.9  222.1  174.2
  G  2 A .  334.0  130.6   33.1  125.6  167.6  270.9
  T  3 A .  258.2  178.7   101.0 114.6  216.6  259.3
#         ---- abbreviated list -----