Found only in Vibrio species, pombe and one other fungi, this is a the N-terminal 150 residues of a family of proteins of unknown function. There is a characteristic NKWYS sequence motif.

1: CpsE from type 2 Streptococcus pneumoniae catalyzes the reversible addition of glucose-1-phosphate to a polyprenyl phosphate acceptor, initiating type 2 capsule repeat unit formation. Cartee RT, Forsee WT, Bender MH, Ambrose KD, Yother J; J Bacteriol. 2005;187:7425-7433. PMID:16237026