Plays a role in the organization and function of the Golgi apparatus. Involved in protein post-translational modification, particularly glycosylation of extracellular matrix proteins. Functions at the trans-Golgi by cooperating with SCYL1 to promote COPI coat assembly into discrete functional domains, supporting Golgi organization and trafficking. . This is the function of Ensembl gene identifier ENSG00000120370 (GORAB, golgin, RAB6 interacting).