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Index

Macromolecular dictionary (mmCIF) version 2.0.09

Category STRUCT_SHEET

Name:
'struct_sheet'

Description:

   Data items in the STRUCT_SHEET category record details about
   the beta-sheets.

Examples:

Example 1 - simple beta-barrel.
.

N  O    N  O    N  O    N  O    N  O    N  O
 10--11--12--13--14--15--16--17--18--19--20  strand_a
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
 30--31--32--33--34--35--36--37--38--39--40  strand_b
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
 50--51--52--53--54--55--56--57--58--59--60  strand_c
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
 70--71--72--73--74--75--76--77--78--79--80  strand_d
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
 90--91--92--93--94--95--96--97--98--99-100  strand_e
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
110-111-112-113-114-115-116-117-118-119-120  strand_f
    N  O    N  O    N  O    N  O    N  O
    /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
130-131-132-133-134-135-136-137-138-139-140  strand_g
     N  O    N  O    N  O    N  O    N  O
   /  \    /  \    /  \    /  \    /  \
N  O    N  O    N  O    N  O    N  O    N  O
150-151-152-153-154-155-156-157-158-159-160  strand_h
     N  O    N  O    N  O    N  O    N  O
   /  \    /  \    /  \    /  \    /  \



 
    _struct_sheet.id                sheet_1
    _struct_sheet.type             'beta-barrel'
    _struct_sheet.number_strands    8
    _struct_sheet.details           .


Example 2 - five stranded mixed-sense sheet with one two-piece strand.
.

      N  O    N  O    N  O    N  O
  -10--11--12--13--14--15--16--17--18->  strand_a
  N  O    N  O    N  O    N  O    N  O
  |  |    |  |    |  |    |  |    |  |
  O  N    O  N    O  N    O  N    O  N
<-119-118-117-116-115-114-113-112-111-110-  strand_b
      O  N    O  N    O  N    O  N    O  N
          \  /   \   /   \   /   \   /   \
          O  N    O  N    O  N    O  N    O  N    O  N
         <-41--40--39--38--37--36--35--34--33--32--31--30-  strand_c
              O  N    O  N    O  N    O  N    O  N    O  N
              |  |    |  |    |  |    |  |    |  |    |  |
              N  O    N  O    N  O    N  O    N  O    N  O
   strand_d1  -50--51--52->   -90--91--92--93--95--95--96--97->  strand_d2
                  N  O            N  O    N  O    N  O    N  O
                  |  |    |  |    |  |    |  |    |  |    |  |
                  O  N    O  N    O  N    O  N    O  N    O  N
                 <-80--79--78--77--76--75--74--73--72--71--70-   strand_e
                      O  N    O  N    O  N    O  N    O  N



 
    _struct_sheet.id                sheet_2
    _struct_sheet.type             'five stranded, mixed-sense'
    _struct_sheet.number_strands    5
    _struct_sheet.details          'strand_d is in two pieces'


Category groups:
    inclusive_group
    struct_group
Category key:
    _struct_sheet.id

Mandatory category: no


International Tables for Crystallography

Volume G: Definition and exchange of crystallographic data

First online edition (2006)

Edited by S. R. Hall and B. McMahon

An essential guide and reference to CIF for programmers, data managers handling crystal-structure information and practising crystallographers.