UBB and Parkinson disease: With this hypothesis, we first performed the in silico analysis utilizing various database platforms such as BGEE (https://bgee.org/, accessed on 10 October 2022) and NCBI- Geo profile (https://www.ncbi.nlm.nih.gov/geoprofiles/, accessed on 10 October 2022) to check the available data of ubiquitin encoding genes in PD-related brain regions.