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2.A.7.9.23
The triose-P:Pi antiporter, TPT or Ape2 of 410 aas and 10 TMSs. Transports inorganic phosphate, 3-phosphoglycerate (3-PGA), 2-phosphoglycerate (2PG) and phosphoenolpyruvate (PEP) as well as triose phosphates. Functions in the export of photoassimilates from chloroplasts during the day. In the light, triose phosphates are exported from the chloroplast stroma in counter exchange with inorganic phosphate (Pi), generated for sucrose biosynthesis in the cytosol. Involved in photosynthetic acclimation, a light response resulting in increased tolerance to high-intensity light (Knappe et al. 2003). The crylstal structures of TPT from Galdieria sulphuraria have been solved revealing the protein bound to two different substrates, 3-phosphoglycerate and inorganic phosphate, in occluded conformations.

Accession Number:Q9ZSR7
Protein Name:Triose phosphate/phosphate translocator TPT, chloroplastic
Length:410
Molecular Weight:44633.00
Species:Arabidopsis thaliana (Mouse-ear cress) [3702]
Number of TMSs:8
Location1 / Topology2 / Orientation3: Plastid1 / Multi-pass membrane protein2
Substrate triose-phosphates, phosphate, 3-phosphoglcerate, 2-phosphoglycerate, Phosphoenolpyruvate

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FASTA formatted sequence
1:	MESRVLLRAT ANVVGIPKLR RPIGAIHRQF STASSSSFSV KPIGGIGEGA NLISGRQLRP 
61:	ILLLDSSAIN GGEKREILKP VKAAAAEGGD TAGDAKVGFL AKYPWLVTGF FFFMWYFLNV 
121:	IFNILNKKIY NYFPYPYFVS VIHLFVGVVY CLISWSVGLP KRAPIDSNLL KVLIPVAVCH 
181:	ALGHVTSNVS FAAVAVSFTH TIKALEPFFN AAASQFIMGQ SIPITLWLSL APVVLGVAMA 
241:	SLTELSFNWL GFISAMISNI SFTYRSIFSK KAMTDMDSTN VYAYISIIAL FVCIPPAIIV 
301:	EGPKLLNHGF ADAIAKVGMT KFISDLFWVG MFYHLYNQLA TNTLERVAPL THAVGNVLKR 
361:	VFVIGFSIVI FGNKISTQTG IGTGIAIAGV AMYSIIKAKI EEEKRQGKKA