Possesses beta-1,3-endoglucanase activity in vitro (PubMed:10672030). May play a role in fruit pulp softening process (Probable). Can cleave beta-1,6-branched glucans in vitro (PubMed:16421930). Hydrolysis of (1->3)-beta-D-glucosidic linkages in (1->3)-beta-D-glucans. Optimum pH is 4.5. Monomer. Expressed in fruit peel and pulp. Expression increases in fruit pulp at early stages of fruit ripening and then decreases in late stages (PubMed:9342866). Expression increases in fruit peel and pulp during ripening (at protein level) (PubMed:20467747). Induced by ethylene (PubMed:20467747). Down-regulated by exposure to constant white light (PubMed:20467747). Causes an allergic reaction in human (PubMed:22162266, PubMed:24198217). Binds to IgE of patients allergic to banana fruit (PubMed:22162266, PubMed:24198217). Induces basophil activation in blood sample of patient allergic to banana fruit (PubMed:22162266). Binds to IgE of patients allergic to rubber latex (PubMed:22162266). Associated to the latex-fruit syndrome, a hypersensitivity to some freshly consumed fruits developed by individuals who are allergic to natural rubber latex (Probable). Belongs to the glycosyl hydrolase 17 family.