Index

Macromolecular dictionary (mmCIF) version 2.0.09

Category STRUCT_SHEET_ORDER

Name:
'struct_sheet_order'

Description:

   Data items in the STRUCT_SHEET_ORDER category record details
   about the order of the residue ranges that form a beta-sheet.
   All order links are pairwise and the specified pairs are
   assumed to be adjacent to one another in the sheet. These data
   items are an alternative to the STRUCT_SHEET_TOPOLOGY data
   items and they allow all manner of sheets to be described.

Examples:

Example 1 - simple beta-barrel.
 
    loop_
    _struct_sheet_order.sheet_id
    _struct_sheet_order.range_id_1
    _struct_sheet_order.range_id_2
    _struct_sheet_order.offset
    _struct_sheet_order.sense
     sheet_1  strand_a  strand_b  +1  parallel
     sheet_1  strand_b  strand_c  +1  parallel
     sheet_1  strand_c  strand_d  +1  parallel
     sheet_1  strand_d  strand_e  +1  parallel
     sheet_1  strand_e  strand_f  +1  parallel
     sheet_1  strand_f  strand_g  +1  parallel
     sheet_1  strand_g  strand_h  +1  parallel
     sheet_1  strand_h  strand_a  +1  parallel



Example 2 - five stranded mixed-sense sheet with one two-piece strand.
 
    loop_
    _struct_sheet_order.sheet_id
    _struct_sheet_order.range_id_1
    _struct_sheet_order.range_id_2
    _struct_sheet_order.offset
    _struct_sheet_order.sense
     sheet_2  strand_a   strand_b    +1 anti-parallel
     sheet_2  strand_b   strand_c    +1 parallel
     sheet_2  strand_c   strand_d1   +1 anti-parallel
     sheet_2  strand_c   strand_d2   +1 anti-parallel
     sheet_2  strand_d1  strand_e    +1 anti-parallel
     sheet_2  strand_d2  strand_e    +1 anti-parallel



Category groups:
    inclusive_group
    struct_group
Category keys:
    _struct_sheet_order.sheet_id
    _struct_sheet_order.range_id_1
    _struct_sheet_order.range_id_2

Mandatory category: no