Found in the same peptidoglycan recognition receptor family as PGLYRP4, rs892145 in PGLYRP2 was also associated with PD risk in the APDR cohort, where heterozygotes had significantly increased risk of PD, with a similar non-significant trend evident for minor TT homozygotes in comparison to major homozygotes. Here, PGLYRP4 is linked to Parkinson disease.