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Which sequence is the one I am interested in?

Hey guys,

I was searching rRNA_gene sequence in Saccharomyces cerevisiae, in BioMart I found the Ensembl IDs.

In NCBI-nucletotide I typed one of the IDs, for example RDN18-2, but I found many hits there. From where could I select the one I am searching for please?

Thanks

gene biomart ensembl sequence fasta

What's wrong with the sequences you got from EnsEMBL ? Why do you then need to go to NCBI ? Entering RDN18-2 in the search bar of the NCBI website would give you all sequences that contain this gene, e.g. the chromosome where it's on, any contig where it's been annotated.

Thank you, I need the fasta file (nucleotide) to make a reference fasta containing whole of yeast rRNA_gene sequence to remove the contamination from my ribi-seq data sets. Anyway I need the nucleotides not just IDs

Simply, the answer is the same as stated by Emily. Using biomart I retrieved the sequences without doubts

1 answer

EnsEMBL's BioMart can export these: Attributes > Sequences > cDNA sequences

Thank you but there were just cDNA start and end and when I downloaded the result, there was just the the IDs name again

At the top of the attributes page you should see six options with radio buttons:

  • Features
  • Structures
  • Homologs
  • Variation (Germline)
  • Variation (Somatic)
  • Sequences

Select sequences. You will get two sections to expand, Sequences and Header information. Choose cDNA from Sequences then add all the information you need in the Header.

Like so.

Thanks Emily

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