Plays a role in vesicular protein sorting. Component of the membrane-associated retromer complex which is essential in endosome-to-Golgi retrograde transport. Also involved in the efficient sorting of seed storage proteins globulin 12S and albumin 2S. The VPS29-VPS26-VPS35 subcomplex may be involved in recycling of specific cargos from endosome to the plasma membrane. Component of the retromer complex which consists of VPS29 (MAG1), VPS26 (VPS26A or VPS26B), VPS35 (VPS35A or VPS35B or VPS35C), VPS5/17 (SNX1 or SNX2A or SNX2B). Component of a retromer subcomplex consisting of VPS29 (MAG1), VPS26 (VPS26A or VPS26B), VPS35 (VPS35A or VPS35B or VPS35C). Expressed in siliques and maturing seeds (at protein level). Belongs to the VPS35 family.