Iridoid glucosyltransferase acting on a broad range of substrates, including both 7-deoxyloganetic acid and 7-deoxyloganetin, curcumin, genistein, luteolin and kaempferol. kcat is 0.00493 sec(-1) for 7-deoxyloganetin. kcat is 0.00512 sec(-1) for UPD-glucose. Expressed in leaves. Low levels of expression in roots. Belongs to the UDP-glycosyltransferase family.