The small SLC43 family: facilitator system l amino acid transporters and the orphan EEG1

Bodoy, Susanna; Fotiadis, Dimitrios; Stoeger, Claudia; Kanai, Yoshikatsu; Palacín, Manuel (2013). The small SLC43 family: facilitator system l amino acid transporters and the orphan EEG1. Molecular aspects of medicine, 34(2-3), pp. 638-645. Elsevier 10.1016/j.mam.2012.12.006

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The SLC43 family is composed of only three genes coding for the plasma membrane facilitator system l amino acid transporters LAT3 (SLC43A1; TC 2.A.1.44.1) and LAT4 (SLC43A2; TC 2.A.1.44.2), and the orphan protein EEG1 (SLC43A3; TC 2.A.1.44.3). Besides the known mechanism of transport of LAT3 and LAT4, their physiological roles still remain quite obscure. Morphants suggested a role of LAT3 in renal podocyte development in zebrafish. Expression in liver and skeletal muscle, and up-regulation by starvation suggest a role of LAT3 in the flux of branched-chain amino acids (BCAAs) from liver and skeletal muscle to the bloodstream. Finally, LAT3 is up-regulated in androgen-dependent cancers, suggesting a role in mTORC1 signaling in this type of tumors. In addition, LAT4 might contribute to the transfer of BCAAs from mother to fetus. Unfortunately, the EEG1 mouse model (EEG1(Y221∗)) described here has not yet offered a clue to the physiological role of this orphan protein.

Item Type:

Journal Article (Review Article)


04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Biochemistry and Molecular Medicine

UniBE Contributor:

Fotiadis, Dimitrios José


500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health








Patrizia Catucci

Date Deposited:

01 May 2014 12:58

Last Modified:

01 May 2014 12:58

Publisher DOI:


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