VOMI binds tightly to ovomucin fibrils of the egg yolk membrane. The structure [1] that consists of three beta-sheets forming Greek key motifs, which are related by an internal pseudo three-fold symmetry. Furthermore, the structure of VOMI has strong similarity to the structure of the delta-endotoxin, as well as a carbohydrate-binding site in the top region of the common fold [2].

1: Crystal structure of vitelline membrane outer layer protein I (VMO-I): a folding motif with homologous Greek key structures related by an internal three-fold symmetry. Shimizu T, Vassylyev DG, Kido S, Doi Y, Morikawa K; EMBO J 1994;13:1003-1010. PMID:8131734

2: The beta-prism: a new folding motif. Shimizu T, Morikawa K; Trends Biochem Sci 1996;21:3-6. PMID:8848836