STRs database » XYLT1 locus
Gene XYLT1
Location 5′ UTR in 16p12.3
Reference region chr16:17470907-17470922 (hg38)
chr16:17564764-17564779 (hg19)
chr16:17477954-17478002 (hs1)
NB! hg38 and hg19 coordinates are for the STR locus that is next to
the reference-missing one, while hs1 is the correct STR region.
Repeat unit GGC
Repeat type Standard
Distribution of repeats in a superpopulation
Overview of repeats

Desbuquois dysplasia-2 (DBQD2), also known as the Baratela-Scott syndrome is caused by mutations in the XYLT1 gene and LaCroix et al. (2019) recently discovered that GGC repeat expansions in the XYLT1 can be disease-causing as well. By investigating 12 individuals from 10 families with DBQD2, a 238 bp sequence missing from the reference genome (hg19 and hg38) was discovered. In that sequence, expansions ranging from ~110 to ~850 repeats were found in all patients. The 238 bp sequence was seen to be present in the control group (100 individuals) as well, where GGC repeats were in the range of 9-20 repeats (LaCroix et al., 2019).

NB! The repeated region is not in the hg38 and hg19 reference genome, but the locus can be genotyped by STRipy or with XYLT1 STR caller that is realigning a sample onto a genome containing the 238 bp reference-missing sequence.

→ View STRipy's population-wide repeat data for XYLT1 locus

Disease(s) and range of repeats
Disease Onset Inheritance Normal Intermediate Pathogenic
Desbuquois dysplasia-2 (DBQD2) Paediatric Autosomal recessive 9-20 - ≥110