Metabolomics Society Forum

Software => MS-DIAL => Topic started by: Sergey Girel on August 25, 2020, 08:11:02 AM

Title: Post-identification issues 2
Post by: Sergey Girel on August 25, 2020, 08:11:02 AM
Hello, guys!

I've noticed some weird thing with post ident. What i want to have, is an ability to identify all possible adducts for my metabolite library. So, the postIdent .txt file has a separate entry for each adduct for each metabolite. Like this:

Code: [Select]
18-Hydroxycortisol	379.21152	6.22	[M+H]+		C21H30O6
18-Hydroxycortisol 401.19346 6.22 [M+Na]+ C21H30O6
18-Hydroxycortisol 417.1674 6.22 [M+K]+ C21H30O6
18-Hydroxycortisol 396.23807 6.22 [M+NH4]+ C21H30O6
18-Hydroxycortisol 361.20204 6.22 [M+H-H2O]+ C21H30O6
18-Hydroxycortisol 348.19148 6.22 [M+H-2H2O]+ C21H30O6
18-Hydroxycortisol 383.1828967 6.22 [M+Na-H2O]+ C21H30O6

MS-DIAL output - attached. To all these masses the adduct [M+H]+ is attributed wrongly.

How to overcome?

Thx in advance!
SG


 


Title: Re: Post-identification issues 2
Post by: Sergey Girel on August 25, 2020, 10:57:09 AM
The whole adduct detection output appears completely broken to me, as output like on the picture (see attached) makes completely no sense.

Why even something with a difference in RT of 0.12 min could be mapped as an adduct of a feature at 9.54... This time i've left only M+H+ adducts in post-ident text file.
Title: Re: Post-identification issues 2
Post by: Hiroshi Tsugawa on September 08, 2020, 07:02:53 AM
Hi Sergey,

thanks, I also encountered the same issue recently. It was completely a bug in the alignment process although the annotation is fine in annotating peaks for each sample file.
I fixed the issue, and I uploaded a trial version of new msdial here.
https://briefcase.riken.jp/public/u9XYQAwnYAhAr10

Could you please try to use this? and, please let me know your update.
Thanks,

Hiroshi
Title: Re: Post-identification issues 2
Post by: Sergey Girel on September 10, 2020, 04:21:02 AM
Hi, Hiroshi!

Was extremely busy these weeks. I'll try to get to the thing during next week and report ASAP.