IsoPepTracker

Proteomics Analysis Platform

Proteomics Analysis Suite

Advanced tools for analyzing protein isoforms, discovering novel transcripts, and performing comprehensive peptide sequence analysis with state-of-the-art algorithms.

Canonical Isoform Analysis

Analyze known gene structures and alternative splicing patterns with comprehensive protease digestion predictions.

Novel Isoform Discovery

Upload transcript sequences to identify novel isoforms and compare against known proteomes with advanced algorithms.

Peptide Sequence Search

Perform BLASTP searches against comprehensive protein databases with statistical analysis and advanced filtering.

Alternative Splicing Analysis

Comprehensive analysis of alternative splicing events using rMATS with functional consequence prediction.

Canonical Isoform Analysis

Analysis Parameters

Overview
Events-centric view
Isoform-centric view

Gene Visualization Overview

What You Can Do Here

Explore how your gene looks and see where peptides come from when you digest proteins with different enzymes. You can see your gene's structure with all different transcript variants, find exactly which peptides you'll get from each transcript, choose your enzyme to compare how different proteases cut your protein, and interactively explore the data by hovering, zooming, and clicking to dig deeper.

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Alternative Splicing Analysis Overview

What You Can Do Here

Discover how alternative splicing creates different peptides. Find out which peptides are unique to specific splice variants! Browse all splicing events to see every way your gene gets spliced, investigate specific events by clicking to dive deep into individual splicing changes, compare splice variants with side-by-side peptide comparison between versions, and see the big picture by visualizing all splicing differences at once.

Alternative Splicing Structure

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Alternative Splicing Events

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Selected Event Information

Peptide Comparison


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Detailed Peptide Data

Browse the full list of peptides for the selected transcript pair.

Comparison Summary

A text summary highlighting the key differences in peptide content.


                          

All Events Peptide Comparison

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All Events Peptide Summary

Detailed breakdown of all peptides and their AS event associations. Junction-spanning peptides show multiple coordinate ranges.


Download Peptide Data

Isoform Analysis Overview

What You Can Do Here

Analyze which transcript isoforms you can detect in your mass spec experiments by comparing peptides across all transcript variants! See all isoforms at once to compare peptides across every transcript variant, categorize peptides as universal, shared, and unique, visualize gene structure with exon and CDS boundaries with peptide mapping, and find isoform-specific signatures by discovering which peptides are unique to specific isoforms.

Multi-Isoform Comparison

Isoform-Specific Peptide Analysis

Focus on One Isoform

Select a specific isoform to highlight and analyze its unique, shared, and universal peptides. Focus on one isoform to highlight and analyze its peptides with color-coded specificity for unique, shared, and universal peptides, get detailed statistics with comprehensive specificity analysis, and download your analysis results.


All Isoforms Visualization

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Highlighted Isoform Peptides

Multi-Isoform Comparative Analysis

Compare Multiple Isoforms

Select 2 to 8 isoforms to visualize their structures side by side and analyze shared, unique, and universal peptides. Compare multiple isoforms by analyzing 2-8 transcript variants with side-by-side visualization to see structural differences, analyze shared peptides to identify universal, shared, and unique peptides, and get detailed overlap statistics with comparative summary.



Comparative Visualization

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Single Isoform Multi-Enzyme Coverage Analysis

Multi-Enzyme Peptide Coverage Comparison

Compare peptide coverage across multiple enzymes for a single isoform. Identify the best enzyme combination for detecting your target isoform! Focus on one isoform by selecting a specific transcript variant for detailed analysis, see coverage differences across up to 6 proteases with multi-enzyme comparison, compare peptide maps and coverage statistics with side-by-side visualization, and optimize your experiments by finding the best enzymes for your proteomics workflow.



Select Enzymes to Compare:
Cuts after K, R
Cuts after F, W, Y, L
Cuts before D
Cuts after K
Cuts before K
Cuts after E

Multi-Enzyme Coverage Results

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Coverage Statistics

Advanced Multi-Isoform Multi-Enzyme Matrix Analysis

Matrix Analysis: Multiple Isoforms × Multiple Enzymes

Combine the power of multi-isoform and multi-enzyme analysis! Generate comprehensive peptide coverage matrices.

Select 2-8 isoforms AND 2-6 enzymes for comprehensive combinations, see all isoform×enzyme combinations with matrix visualization, use advanced filtering for universal, shared, and unique peptides, and get comprehensive analysis by dimension with coverage statistics.

Select Enzymes for Matrix Analysis (2-6):
Cuts after K, R
Cuts after F, W, Y, L
Cuts before D
Cuts after K
Cuts before K
Cuts after E
Genomic Visualization

Shows exon/CDS structure with peptide overlays




Multi-Dimensional Analysis Results

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Coverage Matrix

Peptide Specificity Analysis

Novel Isoform Discovery

Novel Isoform Discovery Overview

🚀 How to Use This Tool

Analyze your novel transcript sequences in 3 simple steps:

📤
1. UPLOAD
FASTA nucleotide sequence
🔍
2. ANALYZE
Find ORFs & proteins
📊
3. COMPARE
Against known genes

Upload RNA-seq transcripts, long-read sequences, or predicted isoforms to discover novel proteins and compare them with known gene variants.

Novel Transcript Analysis Pipeline

Step 1: Upload FASTA File
Upload nucleotide sequences (DNA/RNA). Min. 300 nt recommended.
Step 2: Analysis Parameters
Step 3: Execute Analysis
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Step 2: Select ORF for Analysis

Select the best ORF (Open Reading Frame) for analysis:


                

Step 3: Select Gene for Comparison

Select a gene to compare your novel isoform against:


                

Novel Isoform Analysis

Multi-Isoform Comparative Analysis

Compare your novel sequence with known isoforms:

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Highlighted Isoform Peptides

Peptide Sequence Search

Peptide Search Overview

What You Can Do Here

Got a specific peptide sequence? Use BLASTP to search through 20,000+ genes and find homologous matches with detailed statistics! This tool is BLASTP powered with industry-standard protein homology search, provides rich statistics including E-values, bit scores, and identity percentages, offers flexible matching to find exact matches and similar sequences, has customizable parameters to adjust sensitivity and specificity, and lets you jump right into full gene analysis by clicking results.

Search Peptides Across All Genes & Isoforms

BLASTP Search Parameters
Lower values = more stringent (0.01 recommended)
Minimum sequence identity (50% for discovery)
Maximum number of hits

Search Results

Navigate to Gene Analysis

Click a result above, then navigate to detailed isoform analysis:

100% Perfect Match Found

🎯 100% Perfect Match Selected

Perfect Match Transcript Visualization

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Download Transcript Plot

Alternative Splicing Analysis

rMATS Analysis
SplAdder Analysis

rMATS Peptide Analysis Overview

rMATS Functional Analysis

Analyze alternative splicing events from rMATS output files. Supports SE, A3SS, A5SS, MXE, and RI event types with protein translation and functional prediction.

Upload rMATS File

Select Event Type:
Upload File:
File uploaded successfully!

                      

Expected Columns for :

                  

Analysis Pipeline



Step 1 completed successfully!

                      


                            
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Generate Isoforms


                    

Multi-Isoform Comparative Visualization

Multi-Isoform Comparative Analysis

Compare rMATS inclusion/exclusion isoforms with known gene transcripts:

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Highlighted Isoform Peptides

SplAdder Peptide Analysis Overview

SplAdder Functional Analysis

Analyze alternative splicing events from SplAdder GFF3 output files. Supports SE, A3SS, A5SS, MXE, and RI event types with protein translation and functional prediction.

Upload SplAdder GFF3 File

Select Event Type:
Upload GFF3 File:

GFF3 file uploaded!

Event Type:

                  

Analysis Pipeline



Step 1 completed successfully!

                      


                            

Generate Isoforms


                    

Multi-Isoform Comparative Visualization

Multi-Isoform Comparative Analysis

Step 1: Please complete comprehensive analysis first by selecting an event and clicking 'Generate Inclusion/Exclusion Isoforms'

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Highlighted Isoform Peptides