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Index

Macromolecular dictionary (mmCIF) version 2.0.09

Category STRUCT_REF

Name:
'struct_ref'

Description:

   Data items in the STRUCT_REF category allow the author of a
   data block to relate the entities or biological units
   described in the data block to information archived in external
   databases.

   For references to the sequence of a polymer, the value of
   the data item _struct_ref.seq_align is used to indicate
   whether the correspondence between the sequence of the entity
   or biological unit in the data block and the sequence in the
   referenced database entry is 'complete' or 'partial'. If
   this value is 'partial', the region (or regions) of the
   alignment may be delimited using data items in the
   STRUCT_REF_SEQ category.

   Similarly, the value of _struct_ref.seq_dif is used to indicate
   whether the two sequences contain point differences. If the
   value is 'yes', the differences may be identified and annotated
   using data items in the STRUCT_REF_SEQ_DIF category.

Example:

Example 1 - based on PDB entry 5HVP and laboratory records for the structure corresponding to PDB entry 5HVP.
 
    loop_
    _struct_ref.id
    _struct_ref.biol_id
    _struct_ref.entity_id
    _struct_ref.db_name
    _struct_ref.db_code
    _struct_ref.seq_align
    _struct_ref.seq_dif
    _struct_ref.details
 seq_pdb     1  .  PDB      5HVP      .         .
    ; The structure of the closely related compound,
      isobutyryl-pepstatin (pepstatin A) in complex with
      rhizopuspepsin
    ;
 seq_genbank .  1  GenBank  AAG30358  complete  yes  .



Category groups:
    inclusive_group
    struct_group
Category key:
    _struct_ref.id

Mandatory category: no