Closed StSchulze closed 4 years ago
Hi @StSchulze
PTM-Shepherd does not anticipate anyone doing searches wiith a mass window as large as -350 - 8000 Da masses.
I can fix this and reupload tonight, but just to confirm before I do, are you trying to search with a mass window this large? Only 0.5% of your spectra are above the 4000 Da, so they're likely to be noise.
If you reduce the mass range to be < 4950 Da in length (-350 to 4000 Da or so), it should work with the current version.
Hi @danielgeiszler,
thanks for the quick response. Yes, that mass range is higher than usual since I was testing a few things, but it is not really useful, so don't worry about it. It works with the reduced mass range, so it's perfectly fine.
Quick question that is not really related: where do I actually find the position of the localized mods? If I understand it correctly, in the "rawlocalize" file, if MaxPeaks_Loc > MaxPeaks_Unloc then it counts as localized PSM, but I am not sure where the position/amino acid of that localization is given? Is it any of the uppercase letters in "Localized_Pep"?
Perfect!
Yes, the uppercase positions l all scored equally when placing the modification on them.
The algorithm we use for localization is essentially the same as the one used by MSFragger, so if you turned on the localize function there the data can be found in {RAW_FILE}.tsv. It’s better annotated there since those files are intended to be end-user products, whereas the PTM-S localize/simrt raw files are primarily intended as intermediate files (but we make them available).
On Jul 17, 2020, at 12:01 AM, StSchulze notifications@github.com wrote:
Hi @danielgeiszler,
thanks for the quick response. Yes, that mass range is higher than usual since I was testing a few things, but it is not really useful, so don't worry about it. It works with the reduced mass range, so it's perfectly fine.
Quick question that is not really related: where do I actually find the position of the localized mods? If I understand it correctly, in the "rawlocalize" file, if MaxPeaks_Loc > MaxPeaks_Unloc then it counts as localized PSM, but I am not sure where the position/amino acid of that localization is given? Is it any of the uppercase letters in "Localized_Pep"?
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Great, thanks again for the help! I'll close this here.
Hi,
I have tested PTM-Shepherd so far on results from single MS runs and it worked fine. However, I now wanted to perform a combined analysis on results from multiple MS runs (multiple fractions) and it fails after the localization annotation step.
Here is the printout:
I attached the config file as well as the input .tsv as well. Let me know if you need the mzMLs as well, I can upload them on a file sharing platform. ptmshephered.zip