The cDNA and gene sequences of two PCSK9s are identified from a sea cucumber.
StmPCSK9-1 is a secreted protein while StmPCK9-2 is a cytoplasm protein.
Only StmPCSK9-1 mRNA may be stimulated by LPS and inhibited by poly (I:C) in coelomocytes.
StmPCSK9-1 may play critical roles in the innate immune defense of sea cucumber.