Synonyms:HCC8, hVps54L, SLP 8p, Tumor antigen HOM HCC 8, Tumor antigen SLP 8p, VPS54, VPS54L Background:Acts as component of the GARP complex that is involved in retrograde transport from early and late endosomes to the trans-Golgi network(TGN). The GARP complex is required for the maintenance of the cycling of mannose 6-phosphate receptors between the TGN and endosomes, this cycling is necessary for proper lysosomal sorting of acid hydrolases such as CTSD(PubMed:18367545). Within the GARP complex, required to tether the complex to the TGN. Not involved in endocytic recycling(PubMed:25799061).