Question: Converting rs number SNP IDs from hg18 to hg19
gravatar for e.jabbari
2.0 years ago by
e.jabbari0 wrote:

Hi. I have data back from my DNA samples that were run on the Illumina Neuro consortium array. The SNP list for this array is based on UCSC Hg19. There are a few SNPs of interest from a previous GWAS whose data I would like to extract from my current data. However, the SNP ID and chromosomal position of these GWAS hits are based on the UCSC hg18 and therefore cannot be found when searched for on the Neuro consortium array SNP list (the list has both a SNP rs ID column and a corresponding SNP position column).

I've used an online converter ( but the equivalent hg19 SNP position I get, again, cannot be found in the Neuro consortium array SNP list.

Can anyone please help me get over this obstacle??

Best wishes, Ed

snp • 1.2k views
ADD COMMENTlink written 2.0 years ago by e.jabbari0
  1. Find out genome build of Neuro consortium array SNP list.
  2. Then you can use liftover to corresponding genome build to update the SNPs in your list
  3. Otherway is to take the rsIDs (assuming that your list is fully annotated with rsIDs) and extract corresponding coordinates from latest dbSNP vcf).
ADD REPLYlink modified 2.0 years ago • written 2.0 years ago by cpad011212k

So you have the rs IDs? Or you have the coordinates? Always helpful to show an example of how exactly your data looks like.

ADD REPLYlink written 2.0 years ago by WouterDeCoster41k
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