Cloning, expression and property comparison of Scy p 9, a Scylla paramamosain allergen
This study investigates the properties of Scy p 9 in mud crab (Scylla paramamosain). The gene sequence of filamin C obtain from crabs, which is termed Scy p 9 contains a 2544-bp open reading frame and encodes 848 amino acid residues. Recombinant Scy p 9 (rScy p 9) is expressed in Escherichia coli, it exhibited tertiary structure changes, and the IgE binding activity of rScy p 9 is higher than that of native Scy p 9 (nScy p 9). Moreover, this study explores possibility of the presence and cross-reactivity of filamin C in 8 shellfish. IgE-specific binding to nScy p 9 and rScy p 9 in shellfish allergy patients reveal that rScy p 9 is more sensitive than nScy p 9. The gene sequence of filamin C fills in the blank in shellfish. This study contributes to the understanding of the properties of Scy p 9, these results indicate that rScy p 9 can be used as a candidate for component resolved diagnosis in shellfish.