Questions tagged [vcf]
VCF, acronym for Variant Calling Format, is a text file type used to store information regarding genetic variants.
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How to make CIRCOS plot of VCF file?
I have 3 VCF files, I want to make CIRCOS plot just like the following:
https://www.nature.com/articles/s41598-020-70527-8/figures/4
I try to follow the tutorial but could not understand. The genome ...
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1answer
60 views
Find common SNPs in multiple VCF files
I have 3 VCF files.
A1.vcf
A2.vcf
A3.vcf
I want to get the common SNPs that are present in all these three files. And output must be in vcf format.
output:
...
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1answer
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Filter rows of VCF file for Match=EXACT?
How do I remove rows in a VCF file on 1kGenome column, where Match=EXACT using bash ?
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1answer
34 views
GATK 4.2 using IndexFeatureFile with multiple files
I am trying to use GATK IndexFeatureFile to create ".vcf.gz.tbi" file. But I have 480 files.
For the pilot study I used:
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53 views
Spanning deletion conversion
I have a vcf file created with GATK with spanning deletion https://gatk.broadinstitute.org/hc/en-us/articles/360035531912-Spanning-or-overlapping-deletions-allele- and I now need to compare this VCF ...
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Convert DNA raw data between a different formats [duplicate]
I have .vcf file with partly decoded genome provided by some service. How can I convert this file into other popular formats which may be used in other services? I'...
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1answer
59 views
Making PLINK compatible files from VCF file without phenotype information
I have a big VCF file that I need to convert to, preferably, bed/bim/fam files that are readable by plink. Currently using plink 2. I am aware that this version of plink can be used to convert VCFs ...
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2answers
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Obtaining Whole Genetic Sequence
As an end-user of my own data, specifically raw DNA sequence (WGS, whole genome sequencing). How or where do one obtain such DNA data so that a biology hobbyist can perform bioinformatics on this?
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1answer
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How can I use my Myheritage DNA results file for further analysis?
I had my DNA tested by Myheritage and they sent me a csv file with RSID, Chromosome, position and result (which base) with about 700,000 rows.
I understand most analyses of DNA use VCF files but is ...
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21 views
FMT/DP of missing genotypes in bcftools
I have a VCF file where the FMT/DP of missing genotypes has been recorded itself as missing data (".")
When I filter ...
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0answers
75 views
Filtering samples by FORMAT attributes using bcftools
The -e and -i options of the bcftools filter command appear, by default, to only allow for ...
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2answers
47 views
Finding SNP/Indel Markers of Interspecific Variation
This is a revised version of my original question, edited to include the portions already answered by @Maximilian Press.
Goal:
Find SNP and indel alleles which are fixed between but lack polymorphism ...
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Allele Count and Allele Frequency in VCF files
I'm working in bioinformatics, but my computational skills far outstrip my knowledge of biology or genomics. So forgive the noobish question.
According to the VCF specification, the ...
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1answer
64 views
What tools can I use to look up my alleles, genotypes, or phenotypes from my sequenced DNA (WGS)?
(I am not a Bioinformatics expert, please forgive and educate me if I've used any wrong terms or assumptions here)
I bought a "Whole Genome Sequence" kit, which gave me the following VCF ...
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1answer
101 views
How to import large .bed, .gff, .vcf, .paf, .sam files into an SQL database?
Are there best practices to load different bioinformatics file formats such as VCF, BED, GFF, and SAM to SQL databases? I am wondering how people out there do that efficiently.
All of these three ...
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1answer
40 views
How do I create a VCF file of all known pathogenic mutations in a gene of interest?
I would like to create a list (probably .vcf format would be good) of all known pathogenic missense mutations in a human gene of interest and then add other variants that could lead to the same ...
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1answer
26 views
Consensus on how to select SNPs for creating a phylogeny when the full dataset is too large
I have got a quite large VCF file (about 20k samples with 160k SNPs after filtering for quality etc.) and I would like to get a phylogeny for it. However, the whole dataset's too large for my ...
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How does Allele Number get determined in VCF files?
I am looking at the publicly available gnomAD v3 VCF file.
The header describes the AN field as: "Total number of alleles in samples."
This suggests to me that it should be a constant ...
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1answer
45 views
How to print alternative allele from VCF with htslib c++
I would like to print the alternative allele from a vcf file which i load in with htslib.
The description of some functions:
https://github.com/samtools/htslib/blob/develop/htslib/vcf.h
I have used ...
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2answers
85 views
How can I subset WGS data to the level of WES variants?
I would like to compare mutational signatures1 in patients from different studies, however some studies are based on exome seq (i.e. ~20,000 coding variants) and some are from whole genome seq (i.e. ~...
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1answer
67 views
How do I obtain a vcf read from a pyvcf.Reader?
I wondered how would I be able to obtain variant based on chrom and location range.
Optimally, this function would be like:
...
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2answers
370 views
How is the GT field in a VCF file defined?
As my question in SO was closed and asked to be posted in this forum, I am posting it here
I am not from the bioinformatics domain. However, for the sake of analysis, I am trying to pick up certain ...
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2answers
84 views
Produce .vcf file of ALL mutations in .bam file
I got tasked with a problem, that i thought would be quite simple to solve, but turned out to be quite tricky. Our lab is running targeted mutagenesis experiments in yeast using crispr base editors. ...
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1answer
162 views
Convert VCF to genotype table
How can I convert a VCF file into a genotype table (SNP matrix)?
I have this format:
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1answer
282 views
Download or create VCF from Human Genome Diversity Project (HGDP)
I can't seem to find HGDP data in VCF format.
Does anyone know where I can download it from?
Perhaps there a Snakemake pipeline for calling VCFs from this data?
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VCF spec: is it possible to have other alleles in addition to the MISSING value ('.') in ALTS?
I'm writing a VCF parser, so I have to consider and handle all corner cases regardless of how contrived they may seem. The specification is a bit unclear about the MISSING value ('.') in the ALTS ...
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Filtering a VCF without samples/individuals
Certain VCF files (gnomAD, dbSNP) don't have sample columns defined for individuals.
For example in this gnomAD VCF there is no sample column:
...
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1answer
310 views
VCF-merge fails due to tabix not producing .tbi files
I'm trying to use vcf-merge to combine 2 exome capture vcf files (~250K and ~330K in size) before trying it on all 96 samples. I'd appreciate any advice on the best way to do that! I've detailed what ...
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1answer
533 views
What does the number mean in an HGVSp annotation?
Let's take the example p.Arg452Pro that I got from an annotated VCF file that contains an HGVSp column.
What does ...
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0answers
38 views
Pindel has an extremely large output
I am wondering if I am doing something wrong here.
I ran Pindel (alongside two other structural variant [SV] callers) on four WGS samples. The two other callers ...
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279 views
Create a genotype matrix from VCF file using bcftools
I have a vcf file that contains SNPs from chromosome 2 for 2000 samples. I want to create a genotype matrix from this vcf file.
The file is in zipped format as well so that I can use ...
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1answer
119 views
Allele count is zero
I ran freebayes on bacterial data and got a vcf file. Some of the SNPs found have AC=0, but in the bam file I can see that there are alternative alleles, so in my ...
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1answer
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Running a script in python [closed]
I am trying to run a script in python but I getting this error
...
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2answers
176 views
Generate VCF from different .bam files with different chromosome names
I have two resources of .bam files. One is generated by our lab (1 sample = 1 bam). One is downloaded online (again 1 sample = 1 bam). For the downloaded samples the chromosomes are labelled: chr1, ...
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2answers
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Removing common variants in the 1000 genomes database from .vcf [closed]
I have 15 .vcf files. I need to remove `common variants in the 1000 genomes database' appearing in at least 0.5% of the population
Do you know from where I may start?
Thank you so much
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2answers
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Are there any tools for discovering tandem repeats around a variant in a VCF file?
I know for example PolyX from Pierre's Jvarkit to find the number of repeated REF bases (homopolymers) around a position in a ...
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1answer
316 views
vcf file to gene annotations and or genes
Is there some tool that will convert a vcf/bcf file to some gene annotation, based on the fact that I have the gene annotation of the already exsisting reference genome. Or some tool that will give me ...
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1answer
50 views
Can someone recommend software for reference-based genotype-estimation?
Problem: I have low-coverage sequencing data from humans in vcf format. For each sample, I have PL scores / preliminary genotype calls from the software ATLAS (it's a bit like GATK for those who don't ...
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2answers
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Q: What analyses can I perform with a completely phased genome assembly?
Phasing a genome is the process of determining which variants lie on which copy of each chromosome. For example, position 5,430,500 might have an A on the paternal chromosome, but a T base on the ...
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1answer
96 views
VCF's unknown ('.') values causing problems for GATK's Liftover Vcf
I am having a tough time calling LiftoverVcf in GATK. I have concatenated all of the Vcfs of interest and removed rows with problematic values but now when I run LiftoverVCF I get the following error:
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1answer
76 views
Help with the definitions of fields in a VCF output by Strelka
In Strelka vcf in INFO column we have these
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1answer
94 views
bedtool intersect to compare .vcf file to reference genome
I have a .vcf file generated using samtools. I want to know mutations in specific genes by comparing ...
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2answers
115 views
Looping over several files in bash
I have a bash script:
I am wondering how I can change this script to loop over a bunch of .vcf files and give output .txt with the name of corresponding .vcf
I tried changes done in similar script ...
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2answers
114 views
Changing this code in a way to work for my files
I have a bash script which extracts some information from a .vcf file but one .vcf file at each time. How I can change this script in a way to work on a bunch of .vcf files and the output is a .txt ...
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76 views
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Remove repeated ALT allele from the REF field of a vcf-like file
I have 200 .txt files on a Linux system. In each file, I have the reference allele in the REF column and INDELs in the ...
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3answers
130 views
awk working with large files
I have two very large vcf files 2GB and 6GB I want to look for unique combinations of CHROM and POS and output the row that matches. However, because the files a so large my machine always hang and ...
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5answers
375 views
Fix dash/empty ALT alleles for deletions in VCF
I have a VCF file that has deletions specified like this, with the REF allele containing only the deleted portion and the ALT allele just saying -:
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Empty values in FILTER field after running Mutect2
I was expecting something like in this image:
But when I ran Mutect2, the FILTER field was empty in the output VCF file. How can I enable PASS filters?
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1answer
112 views
Subset a multisample VCF file
I need some help with GATK. I have a multisample vcf file containing 18125 samples. After performing PCA I have around 303 samples as outliers and I wanted to remove these samples from my multisample ...
