Tag: genomeGenerate

ouput files after GenomeGenerate

Dear Dr Dobin, I’m a biologist learning how to do Bio-informatics. GCF_000001405.40_GRCh38.p14_genomic.fna genomic.gff I used 2 different machines to do it, my home computer (8 cores, 16G RAM w/ Linux) and a server from my lab.  Using the server, I used the default parameters with GenomeGenerate, whereas on my computer…

Continue Reading ouput files after GenomeGenerate

mapping – STAR error in snakemake pipeline: “EXITING because of FATAL ERROR: could not open genome file”

I’m trying to use a 2 pass STAR mapping strategy (also explained here informatics.fas.harvard.edu/rsem-example-on-odyssey.html), but I’m getting an error. I’ve read through this page [https://github.com/alexdobin/STAR/issues/181] and I have a similar issue, but the discussed solutions don’t seem to help. Perhaps this is more a snakemake issue rather than a STAR…

Continue Reading mapping – STAR error in snakemake pipeline: “EXITING because of FATAL ERROR: could not open genome file”

MARS seq alingment

MARS seq alingment 0 Hello everyone, new here and also new to the field. was asked to create a pipeline for RNA seq and after two months of self learning of how to interact with each code im stuck with the program STAR. what im trying to do for now…

Continue Reading MARS seq alingment

Indexing with STAR

Indexing with STAR 0 Hello, I am working with RNA seq data and creating an index of reference genome Gossypium hirsutum by using STAR. STAR asks GTF annotation format while my file is GFF3. According to literature, in order to run GFF file I need to remove –sjdbOverhang 50 and…

Continue Reading Indexing with STAR

How to download the Homo_sapiens.GRCh38.100.gtf and Homo_sapiens.GRCh38.dna.primary_assembly.fa files for my analysis?

How to download the Homo_sapiens.GRCh38.100.gtf and Homo_sapiens.GRCh38.dna.primary_assembly.fa files for my analysis? 0 I am trying to perform STAR alignment and I need the reference files for indexing. I would like to know how to download the Homo_sapiens.GRCh38.100.gtf and Homo_sapiens.GRCh38.dna.primary_assembly.fa files so that I can use my following code for indexing…

Continue Reading How to download the Homo_sapiens.GRCh38.100.gtf and Homo_sapiens.GRCh38.dna.primary_assembly.fa files for my analysis?

STAR Genome Indexing

STAR Genome Indexing 0 One of the arguments that STAR –genomeGenerate takes in is sjdbOverhang which the manual says “specifies the length of the genomic sequence around the annotated junction to be used in constructing the splice junctions database” and that it should be equal to read length – 1….

Continue Reading STAR Genome Indexing

STAR rna-seq for bacterial genomes

Hi, I’m willing to use STAR for bacterial genomes. I wanted to ask if this is strongly unadvised or if there is a way to manage the main challenges of mapping reads to prokaryotes. (I know there are specific tools for this purpose, i.e. EdgePro, but I’m a beginner in…

Continue Reading STAR rna-seq for bacterial genomes