The Rice GT Database was created to integrate and host functional genomic information for all putative rice Glycosyltransferases (GTs), as a part of Joint BioEnergy Institute (JBEI). The database contains information on 793 putative rice GTs (gene models). GTs were identified from the rice genome according to sequence similarity searches based on the Carbohydrate Active enZymes (CAZy) database. Our goal is to integrate disparate data sets into a logical, user-friendly format. To accomplish this, we have developed a platform to display user-selected functional genomic data on a phylogenetic tree, including sequence information, mutant line information, expression data and so on. The database also includes an interactive chromosomal map showing the positions of all rice GTs. Links are provided to the MSU/TIGR and RAP-DB rice genome annotation databases. We hope this format will make it easier to compare closely related GTs within different families as well as perform global comparisons between sets of related families. We would greatly appreciate any feedback you may have that would assist us in continually improving this database.