scholarly journals PTMSearch: A Greedy Tree Traversal Algorithm for Finding Protein Post-Translational Modifications in Tandem Mass Spectra

2011 ◽  
pp. 162-176 ◽  
Author(s):  
Attila Kertész-Farkas ◽  
Beáta Reiz ◽  
Michael P. Myers ◽  
Sándor Pongor
Keyword(s):  
Mass Spectra ◽  
Tandem Mass ◽  
Post Translational Modifications ◽  
Tandem Mass Spectra ◽  
Tree Traversal ◽  
Traversal Algorithm

scholarly journals Understanding the limit of open search in the identification of peptides with post-translational modifications — A simulation-based study

2018 ◽  
Author(s):  
Jiaan Dai ◽  
Fengchao Yu ◽  
Ning Li ◽  
Weichuan Yu
Keyword(s):  
Analytical Model ◽  
Mass Spectra ◽  
Mass Spectrometry Data ◽  
Supplementary Information ◽  
Necessary Condition ◽  
Tandem Mass ◽  
Search Methods ◽  
Post Translational Modifications ◽  
Tandem Mass Spectra ◽  
The Relationship

AbstractMotivationAnalyzing tandem mass spectrometry data to recognize peptides in a sample is the fundamental task in computational proteomics. Traditional peptide identification algorithms perform well when identifying unmodified peptides. However, when peptides have post-translational modifications (PTMs), these methods cannot provide satisfactory results. Recently, Chick et al., 2015 and Yu et al., 2016 proposed the spectrum-based and tag-based open search methods, respectively, to identify peptides with PTMs. While the performance of these two methods is promising, the identification results vary greatly with respect to the quality of tandem mass spectra and the number of PTMs in peptides. This motivates us to systematically study the relationship between the performance of open search methods and quality parameters of tandem mass spectrum data, as well as the number of PTMs in peptides.ResultsThrough large-scale simulations, we obtain the performance trend when simulated tandem mass spectra are of different quality. We propose an analytical model to describe the relationship between the probability of obtaining correct identifications and the spectrum quality as well as the number of PTMs. Based on the analytical model, we can quantitatively describe the necessary condition to effectively apply open search methods.AvailabilitySource codes of the simulation are available at http://bioinformatics.ust.hk/[email protected] or [email protected] informationSupplementary data are available at Bioinformatics online.

Unrestrictive protein modification localization and quality control for open search of mass spectra

2018 ◽  
Author(s):  
Zhiwu An ◽  
Fuzhou Gong ◽  
Yan Fu
Keyword(s):  
Mass Spectrometry ◽  
Quality Control ◽  
Tandem Mass Spectrometry ◽  
Mass Spectra ◽  
Protein Modification ◽  
Software Tool ◽  
Tandem Mass ◽  
Simulation Data ◽  
Post Translational Modifications

We have developed PTMiner, a first software tool for automated, confident filtering, localization and annotation of protein post-translational modifications identified by open (mass-tolerant) search of large tandem mass spectrometry datasets. The performance of the software was validated on carefully designed simulation data. <br>

MS_Piano: A Software Tool for Annotating Peaks in CID Tandem Mass Spectra of Peptides and N-Glycopeptides

2021 ◽  
Author(s):  
Xiaoyu Yang ◽  
Pedatsur Neta ◽  
Yuri A. Mirokhin ◽  
Dmitrii V. Tchekhovskoi ◽  
Concepcion A. Remoroza ◽  
...  
Keyword(s):  
Mass Spectra ◽  
Software Tool ◽  
Tandem Mass ◽  
Tandem Mass Spectra

Combining low- and high-energy tandem mass spectra for optimized peptide quantification with isobaric tags

2010 ◽  
Vol 73 (4) ◽  
pp. 769-777 ◽  
Author(s):  
Loïc Dayon ◽  
Carla Pasquarello ◽  
Christine Hoogland ◽  
Jean-Charles Sanchez ◽  
Alexander Scherl
Keyword(s):  
Mass Spectra ◽  
High Energy ◽  
Tandem Mass ◽  
Peptide Quantification ◽  
Tandem Mass Spectra ◽  
Isobaric Tags
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