Xylogalacturonan beta-1,3-xylosyltransferase (, xylogalacturonan xylosyltransferase, XGA xylosyltransferase) is an enzyme with systematic name UDP-D-xylose:xylogalacturonan 3-beta-D-xylosyltransferase. This enzyme catalyses the following chemical reaction
This enzyme is involved in plant cell wall synthesis.