yMap is a python based fast and robust automated method to map large yeast variants data to
- proteins post-translational modifications
- proteins domains,
- proteins-nucleotide binding domains,
- proteins structural regions,
- proteins active and binding sites
- proteins networks visualisation.
The post-translational modifications in yMap are collected from different repositories like UniProt and sources with annotated PTMs like PTMcode 2.0 and PTMfunc, for more details, see below.
In a user friendly three steps, it generates a "final-report" file to report all the non-synonymous mutations that overlaps or falls inside the above mentioned proteins functional regions. The final-report is complemented with two other files; enrichment and visualisation id file
#Dependencies
yMap depends on:
python 2.6.x
python 3.x
Orange bioinformatics (http://pythonhosted.org/Orange-Bioinformatics/#installation)
#Video demo
#PyPi https://pypi.python.org/pypi/ymap
#Installation
pip install ymap
#Usage
step1: $ ydata #download all the data needed for proper execution of ymap
step2: copy and paste the "mutation file" to the present directory
step3: $ yproteins #if starting file contains the mutations at proteins level
(SEE example_mutation_file/mutation.txt).
step3: $ ygenes #if starting file contains the mutations at chromosomes level with genetic coordinates (SEE example_mutation_file/mutated_proteins.txt).
step4: $ yweb # generates the html based visualization of mutated proteins on BioGrid db.
(NOTE: a user will required to specify the 'path/to/biog.txt' as input, when asked)
*To run from source code:
Change path to directory containing ymap.py
$python ymap.py -d ydata (step1)
$pyhton ymap.py -p yproteins (step3)
$pyhton ymap.py -g ygenes (step3)
$pyhton ymap.py -w yweb (step4)
#Contents: Introduction to different types of data (generated/provided in yMap) Introduction to all the methods Results (introduction to results data) Troubleshoots
#Introduction to data:
—————input———
A - mutation (tab separated txt "mutated_proteins.txt") file contains proteins common names and mutated residues positions (please following the exact naming convention of input files as in example data, for proper execution of ymap; see example data))
———output———(Pre-analysis data needed for ymap execution)
(i) Raw files downloaded from UniProt and stored in the present dir.by executing step2.
1 - uniprot_mod_raw.txt # Uniprot data in raw format
2 - yeastID.txt # Yeast id containing file
3 - PTMs.txt # contains yeast proteins, PTMs position and PTM types
4 - PTM_id_file.txt # combined file of 2 and 3.
5 - domains.txt # yeast proteins, domains start, end and names
6 - id_domain.txt # combined file of 2 and 5.
7 - bact.txt # contains proteins id, and binding and active sites positions
8 - sites_id.txt # combined file of 2 and 7.
9 - uniprot_bioGrid.txt # contains all the yeast proteins with BioGrid ids
(i-B) Pre downloaded files from PTMcode and PTMfunc
(PTMfunc)
3DID_aceksites_interfaceRes_sc.txt
3DID_phosphosites_interfaceRes_sc.txt
3DID_ubisites_interfaceRessc_sc.txt
SC_psites_interactions_sc.txt
SC_ubi_interactions_sc.txt
SC_acet_interactions.txt
(PTMcode)
schotspot.txt
sc_btw_proteins.txt
sc_within_proteins.txt
(ii) Processed data from UniProt and other resources by executing step2.
A number of files germinated from the original UniProt file for further analyses:
PTMs.txt contains Post-translational modifications
PTM_id_file.txt PTMs.txt with all the proteins ids
PDB.txt contains PDB structural data from UniProt
nucleotide.txt contains DNA-Protein binding motifs
back.txt contains Proteins active and binding positions
d_id_map.txt contains protein domains with all the ids
id_domain.txt gff data from frmt.txt with all the ids
domains.txt domains data from UniProt
frmt.txt formatted gff file for further process
sites_id.xt Active/binding sites with all ids
unipro_bioGrid.txt contains BioGrid ids of all yeast proteins
nucleotide.txt proteins (uniprot) id with DNA binding motifs
id_nucleotide.txt contains data from nucleotide with all the protein ids for processing
#Results
(inside ymap-results folder, each subfolder contains three files, one with mutations analysis file, which includes mutated proteins, mutation positions, mutated functional region and source of data, pvalue.txt of pathways enrichments and biog.txt, a biogrid id corresponding to mutated proteins)
/PTMs/mutated_proteins.txt
contains proteins ids mutated at PTMs sites
/Domains/domains_mapped.txt
contains proteins ids mutated for protein domains
/A-B_binding/ab_mutation_file.txt
contains proteins ids mutated at active and binding
PPI - PTMfunc data
PPI/acetylation
PTM-type containing residue is important in PPI
PPI/Phosphorylation
PTM-type containing residue is important in PPI
PPI/ubiquitination
PTM-type containing residue is important in PPI
Interface
Interface/ubiquitination
PTM-type containing residue present at protein interface
Interface/acetylation
PTM-type containing residue present at protein interface
Interface/Phosphorylation
PTM-type containing residue present at protein interface
PTMs_hotSpot
PTMs concentrated in a small motif known as hopspot by Beltrao et al. Cell 2012.
PTMs_between_proteins - PTMcode2.0 data
PTMs present between two proteins and involvined in crosstalk.
PTMs_witnin_proteins
PTMs present within a protein and involvined in crosstalk.
biog.txt
contains proteins BioGrid ids for -w web function (this file present in each subfolder).
p-value.txt
contains pathways enrichments for each type of mutation observed (this file present in each subfolder).
final_report.txt
its a refined version of summary.txt and contains, protein UniProt id, common names, amino acid mutation position, wild type amino acid, mutated amino acid, type of mutation (non-synonymous/stop codon), mutation feature types (i.e. PTM-type or domain-name etc), mutation feature (i.e. PTMs, domain or another) and source of data (e.g. UniProt)
#Introduction to all the methods (How individual methods work in ymap)
NOTE: change the name of the mutations containing file to ‘mutated_proteins.txt’ (see example data) and copy to the cd path/to/ymap
Functions name Description
mutation_types_file() mutation type and amino acid change calculation (where ref. and mutant base known)
pTMdata() Downloads UpiProt data as a raw txt file (uniprot_mod_raw.txt)
clean() cleans file 'uniprot_mod_raw.txt' into a tab separated’PTMs.txt'
iD() This method retrieves the different ID types for maping (yeastID.txt)
pmap() if proteins ids are not SDG or uniprot or common names, this method maps the ids
ptm_map() This method maps the overlap between mutated codons from previous method to the PTM sites
dclean() domain data needed to be filters from UniProt file, before mapping domains d_map() maps mutations to the yeast domains (id_domain.txt)
dmap() map mutations to proteins domains (domains_mapped.txt)
enrich() This method performed enrichment analysis of mutated proteins and return the p value of functional enrichment of mutated proteins at different functional regions/residues; see main text for how pvalue is calculated. ab() prepares raw Uniprot data (uniprot_mod_raw.txt) for yeast active and binding sites mutation analysis (bact.txt)
id() maps proteins ids to active and binding sites containing proteins (sites_id.txt)
mmap() map mutations to proteins active and bindings sites (ab_mutation_file.txt)
nucleotide() prepares the UniProt data for the nucleotide motifs mapping to mutations
n_map() maps different proteins ids to nucleotides data
nucleotide_map() maps mutations to the nucleotide binding motifs
bioGrid() Downloads BioGrid ids of yeast proteins from UniProt for further processing including mapping and web browsing WARNING: requires powerful machines to work with as its expensive to open in machines with low memory.
preWeb() maps mutations to BioGrid ids (biog.txt)
bweb() opens the BioGrid db in browser with as many tabs as mutated proteins
pdb_c() Structure data filtration from UniProt
mu_map() mutations proteins mapped to the yeastID file
pdb() This code maps mutations to the proteins structural regions
interface() PTM present at the interface of two proteins and known to play role in interaction (Beltrao et al. Cell 2012)
ppi() PTM present at the interface of two proteins and known to play role in interaction (Beltrao et al. Cell 2012)
withinPro() PTMs (predicted) involved in the crosstalk within a given protein at baker's years (Minguez el 2012)
betweenPro() PTMs (predicted) involved in the crosstalk in different proteins at baker's years (PTMcode 2.0; Minguez el 2012)
hotspot() PTMs containing motifs in a close proximity are named hotspots (Beltrao et al. Cell 2012)
#Troubleshoots
1 - The files of annotated PTMs are missing or less them nine.
Reason: unzip the data/PTMcode+PTMfunc_data/sc_btw_proteins.txt.zip did not worked in $ ydata command. how to correct: manually unzip the sc_btw_proteins.txt.zip file and run $ ydata (normally this will not needed)
2 - $ ygenes gives an error message:
“IndexError: string index out of range”
2(b) - The same reason (below) leads to the unsuccessful mapping of mutations to different functional regions like domains:
"Error: input file contains error position forBRR2protein"
Reason: the mutations positions fall outside the start and end of the respective proteins (NOTE: to analyse the proteins in starting file with correct mutation positions, user can use individual methods uniprot_data() and functional_data(), to get all the analyses done, than execute the command-line step3)
how to correct: Look at the positions of mutations and compare them manually if they correspond to start and end positions of a protein, if not, correct the problem and re-run $ ygenes command.
3 - yweb fails to locate the directory.
how to correct: In python 2.x, the path should be given as “path/to/biog.txt” but in python 3.x it’s without inverted commas, path/to/biog.txt
Ahmed Arslan and Vera van Noort, yMap: An automated method to map yeast variants to protein modifications and functional regions Bioinformatics October 22, 2016 doi:10.1093/bioinformatics/btw658
http://www.biw.kuleuven.be/CSB/
This work is supported by KU Leuven research fund.