vdemichev / DiaNN

DIA-NN - a universal automated software suite for DIA proteomics data analysis.
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Processing data with heavy labelled proteins and/or peptides #1253

Open SStoychev01 opened 1 week ago

SStoychev01 commented 1 week ago

Hi,

How would one process DIA data in DIA-NN from a digested lysate spiked with Heavy Lys and Arg 13C and 15N labeled protein standards?

Thanks,

Stoyan

vdemichev commented 1 week ago

Hi Stoyan,

Should be quite easy:

Best, Vadim

SStoychev01 commented 1 week ago

Thanks Vadim, will give this a go.

Best,

Stoyan

JM-Bader commented 1 week ago

I am also interested in searching DIA data for heavy-labeled peptides and then loading the data into Skyline, to build a subsequent targeting assay.

1) Is it possible to have only C-terminal Ks and Rs labelled (SILAC mass shift) ? I have a few miscleaved spike-in peptides that have an internal K or R. Manipulation of the parquet file is easy, but does DIA-NN allow both labeled and unlabeled K and R within a peptide? 2) Let's say my sample contains these heavy spike-in peptides only, no unlabelled background proteome. This is useful to build a library for targeting. I guess it should be possible to run this with fixed modifications directly in DIA-NN. How would one do that?

I tried this, which however crashed during the processing of the first raw file: --fixed-mod heavyK,8.014199,]^K,label --fixed-mod heavyR,10.008269,]^R,label --lib-fixed-mod heavyK --lib-fixed-mod heavyR --original-mods

3) .parquet files are generated from DIA-NN 1.9.1 and higher, correct? Can the modified .parquet library be used for a search by DIA-NN 1.8.1 (or any 1.8 version)? The reason is that Skyline appears not to properly load DIA-NN results from 1.9 versions.

thanks!