Question: International Protein Index: No Entries Found
gravatar for Pierre Lindenbaum
3.6 years ago by
Pierre Lindenbaum77k wrote:

I've been asked to retrieve the fasta sequences of a set of proteins identified by their International Protein Index. I've been using to retrieve the sequences, however for a few IPIs, the sequences were not found.


could it be a typo in the identifiers or could it be something like a 'deprecated' identifier ?


fasta sequence protein • 642 views
ADD COMMENTlink modified 14 months ago by Biostar ♦♦ 0 • written 3.6 years ago by Pierre Lindenbaum77k

Production of the IPI database ceased last year ( IPI has been replaced by datasets provided by UniProt, which is extending equivalent complete proteome coverage into many other species. Where possible IPI use of IPI should be replaced by the use of the equivalent UniProt entries. For cases where you are only interested in the sequences, I suggest searching UniParc since this has all the IPI sequences and provides details of identical sequences in other data sources.

ADD REPLYlink written 3.6 years ago by Hamish2.8k
gravatar for Michael Kuhn
3.6 years ago by
Michael Kuhn4.8k
Dresden, Germany
Michael Kuhn4.8k wrote:

On the IPI page you can also query the "IPI History", which finds a record for IPI00000178 and also for the other two.

ADD COMMENTlink written 3.6 years ago by Michael Kuhn4.8k

The IPI identifier tracking database "IPI History" is also available in dbfetch/WSDbfetch. So Pierre can just tweak the URLs being used to get information to find out why. Just replace the database name (db) with 'ipihistory' and either set the format to 'default' or remove the format specifier. For example:

The returned tab-delimited table details which versions of IPI the identifier appeared in, and details of why an entry was removed (see If the specific entry/sequence data referred to by the IPI is required, then you can either look-up the IPI identifier in UniParc (it helps if you have the full identifier including the sequence version), also available in dbfetch/WSDbfetch, or use the IPI release information from "IPI History" to identify the required release files on the FTP site (

ADD REPLYlink written 3.6 years ago by Hamish2.8k
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