So I basically have the site business up and running. But there's one 
hitch. Anybody know what's going on here?...

PDB SITE:

  http://www.wwpdb.org/documentation/format23/sect7.html
 
 Record Format

COLUMNS       DATA TYPE         FIELD            DEFINITION
------------------------------------------------------------------------
 1 -  6       Record name       "SITE    "
 8 - 10       Integer           seqNum      Sequence number.
12 - 14       LString(3)        siteID      Site name.
16 - 17       Integer           numRes      Number of residues comprising
                                            site.

19 - 21       Residue name      resName1    Residue name for first residue
                                            comprising site.
23            Character         chainID1    Chain identifier for first 
residue
                                            comprising site.
24 - 27       Integer           seq1        Residue sequence number for 
first
                                            residue comprising site.
28            AChar             iCode1      Insertion code for first residue
                                            comprising site.
... etc.

So here they are allowing for an insertion code but not an alternative 
conformation id, which might make sense, since a site probably would be 
represented in both alternative conformations.


CIF dictionary says:

# struct_site_gen

    * _struct_site_gen.auth_asym_id
    * _struct_site_gen.auth_atom_id
    * _struct_site_gen.auth_comp_id
    * _struct_site_gen.auth_seq_id
    * _struct_site_gen.details
    * _struct_site_gen.id
    * _struct_site_gen.label_alt_id
    * _struct_site_gen.label_asym_id
    * _struct_site_gen.label_atom_id
    * _struct_site_gen.label_comp_id
    * _struct_site_gen.label_seq_id
    * _struct_site_gen.site_id
    * _struct_site_gen.symmetry

OK... so where's the insertion code here? Looks to me that this time we 
have an alternative location ID, but not an insertion code. I also don't 
see why the "auth_" set is different from the "label_" set.

Explanation?

Examples?

 

Bob


-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get. 

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900



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