Binary larvicide subunit BinB

UniProtKB accession:  P18568

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UniProtKB description:  Component of a binary toxin active against Culex and some Aedes mosquito larvae (PubMed:1512580, PubMed:8419297). This subunit is responsible for localized binding to specific regions of the host larval gut. The individual subunits are not toxic. BinAB and this subunit alone bind to the gastric caecum and posterior midgut of C.quinquefasciatus larvae. Binary toxin internalization into host gut cells requires both proteins. Does not bind to the midgut of Aedes aegypti (PubMed:1512580). Toxic to Aedes atropalpus mosquito larvae; mortality towards both C.quinquefasciatus and A.atropalpus is maximal by 48 hours. A.aegypti is not very susceptible to this toxin (PubMed:8419297). Binding component of binary toxin. The 51 kDa polypeptide acts synergetically with the 42 kDa polypeptide for expression of a larvicidal toxin.