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- Path: sparky!uunet!pipex!bnr.co.uk!uknet!comlab.ox.ac.uk!oxuniv!oxpath!jasper
- From: jasper@vax.path.ox.ac.uk
- Newsgroups: bionet.software
- Subject: Protein Structure Prediction mailserver
- Message-ID: <1993Jan2.173434.1@vax.path.ox.ac.uk>
- Date: 2 Jan 93 16:34:34 GMT
- Organization: Oxford University Molecular Biology Data Centre
- Lines: 63
- Nntp-Posting-Host: heatly
- Nntp-Posting-User: jasper
-
- Hi,
-
- I haven't *seen* this posted anywhere yet (apologies if it has been,
- I have that sneaking suspicion we are losing some articles through the feed)
- but the information is tucked away in Nature, so I think it needs advertising!
-
- **** PHD - a new mail server for protein secondary structure prediction ***
-
- First the picture: for those of us who just run sequence through the
- database and are then faced with one of Russ Doolittle's less attractive
- options (Like "your protein does not match anything else yet seen in the
- Universe" :) this is going to help you. But if you find that your protein is a
- member of a family, and there is no homolgous 3D structure to work to, you are
- kind of stuck with secondary structure predicitions that you *know* are only
- going to be a little over half right, and you don't which half it's going to
- be..... The better the prediction is going to be, the more useful it could be
- to you. And if you have a measure for which parts are more likely to be
- correct then that is going to help enormously.
-
- So: and this is the end of a string of letters and papers that make
- interesting reading in themselves; look at Nature, vol 360, page 540 (10th Dec
- 1992 issue) at the letter from Burkhard Rost and Chris Sander from EMBL
- describing a new network server (PHD, Profile Neural Network Prediction) for
- the prediction of secondary structures using information from multiple
- sequence alignments.
-
- To get started send HELP as the body of text to the server at
- PredictProtein@EMBL-Heidelberg.DE, and go from there.
-
- You will be instructed on the correct format to send your sequence,
- which will then be matched against the database, multiply aligned, the
- prediction of secondary structure calculated and the whole thing sent back.
- The return times are reasonably fast, but maybe that's because I'm testing it
- in the vacation? Overall round trip time for a 200 amino acid domain is about
- 30 minutes. Of course this could get a lot slower if everyone tries it at
- once!
-
- One final point; the whole process will not work if your sequence has
- less than 30% idenitity to another member of the database. You may be in the
- position where your own favorite sequence is a member of a family, but at less
- than 30%. In which case, you should be able to learn something using one of
- the other family members; the results will not include 'your' protein, but if
- you already have alignments that are satisfactory this may be useful.
-
- I, for one, would be interested to know what sort of results people
- get from the system, and how well the outupt compares with a range of known or
- new 3D structures. Maybe as people get data they could feed this back to the
- group? Unless there is preference from EMBL as to where to send feedback?
-
- I hope I'm not stealing anyone's thunder by posting this, but it looks
- too good to go unnoticed.
-
- Well, many thanks to Burkhard and Chris, and New Years greetings to
- everyone else!
-
- regards, jasper
-
- Jasper Rees
- Oxford University Molecular Biology Data Centre (nights and weekends)
- Sir William Dunn School of Pathology (always)
- Oxford University
-
- jasper@vax.path.ox.ac.uk
-