Family 64 glycoside hydrolases have beta-1,3-glucanase activity [1,2].

1: Molecular characterization and expression in Escherichia coli of three beta-1,3-glucanase genes from Lysobacter enzymogenes strain N4-7. Palumbo JD, Sullivan RF, Kobayashi DY; J Bacteriol. 2003;185:4362-4370. PMID:12867444

2: Structure, mechanistic action, and essential residues of a GH-64 enzyme, laminaripentaose-producing beta-1,3-glucanase. Wu HM, Liu SW, Hsu MT, Hung CL, Lai CC, Cheng WC, Wang HJ, Li YK, Wang WC; J Biol Chem. 2009;284:26708-26715. PMID:19640850