SWEET sugar transporter (IPR004316)

Short name: SWEET_sugar_transpr

Overlapping homologous superfamilies


Family relationships


This family contains specific sugar efflux transporters that are essential for the maintenance of animal blood glucose levels, plant nectar production, and plant seed and pollen development. In many organisms it mediates glucose transport; in Arabidopsis it is necessary for pollen viability; and two of the rice homologues are specifically exploited by bacterial pathogens for virulence by means of direct binding of a bacterial effector to the SWEET promoter [PMID: 21107422]. Homologues of SWEETs have been identified in bacteria [PMID: 24027245].

The founding member of the SWEET family, MtN3, was identified as a nodulin-specific EST in the legume Medicago truncatula [PMID: 8634476]. Another protein in this family may be involved in activation and expression of recombination activation genes (RAGs) [PMID: 8630032].

This family contains a region of two transmembrane helices that is found in two copies in most members of the family.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0016021 integral component of membrane

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.