Enables identical protein binding activity. Predicted to be involved in several processes, including Golgi organization; endoplasmic reticulum to Golgi vesicle-mediated transport; and negative regulation of protein targeting to mitochondrion. Located in Golgi apparatus; endoplasmic reticulum; and endoplasmic reticulum-Golgi intermediate compartment. Is integral component of membrane. Human ortholog(s) of this gene implicated in factor V deficiency and factor XIII deficiency. Orthologous to human LMAN1 (lectin, mannose binding 1). [provided by Alliance of Genome Resources, Apr 2022]