Fewer Structures than Protein Sequences
- Most protein sequences in the Entrez Protein database do not yet have a
resolved structure
- As of 11/6/07, there are 18,345,095 protein records and 46,554
structure records
- (For future reference -- to see the latest statistics yourself, compare
the number of records in the Entrez Protein and Entrez Structure databases by
using "Preview/Index" to viewing the Index of the "Filter"
field for each database. The number shown in parentheses beside the index term
"all" is the total number of records in a database.)
- So the chances of finding a resolved structure for a given protein sequence
are low.
- Therefore, if the traditional methods for searching an Entrez database do not
find a structure for your protein of interest, you might need to use some creative
"back doors" for retrieving structures that might have some relationship to
your protein of interest.
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