Molecular characterization of an Arabidopsis thaliana cDNA encoding a novel putative adenylate translocator of higher plants

• Published in: FEBS letters Vol. 374; no. 3; pp. 351 - 355
• Main Authors: Kampfenkel, Karlheinz, Möhlmann, Torsten, Batz, Olaf, Montagu, Marc Van, Inzé, Dirk, Neuhaus, H. Ekkehard
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 06.11.1995; Wiley
• Subjects: Arabidopsis - genetics; Arabidopsis thaliana; ATP/ADP translocator; Base Sequence; Blotting, Northern; Blotting, Southern; cDNA; Cellular Biology; DNA, Complementary - chemistry; DNA, Complementary - isolation & purification; Life Sciences; Membrane Proteins - genetics; Mitochondrial ADP, ATP Translocases - chemistry; Mitochondrial ADP, ATP Translocases - genetics; Molecular Sequence Data; Plastid; Rickettsia prowazekii - enzymology; Sequence Alignment; Sequence Analysis, DNA; Arabidopsis thaliana; cDNA; Plastid; ATP/ADP translocator; ADN C; TRANSLOCATEUR ATP-ADP
• ISSN: 0014-5793; 1873-3468
• DOI: 10.1016/0014-5793(95)01143-3

We have isolated an Arabidopsis thaliana cDNA encoding a highly hydrophobic membrane protein of 589 amino acids which contains 12 potential transmembrane helices and shows a high degree of similarity (43.5% identity, 66.2% similarity) to the ATP/ADP translocase of the Gram-negative bacterium Rickettsia prowazekii, an obligate intracellular parasite responsible for the epidemic typhus. This rickettsial translocator resides in the cytoplasmic membrane and allows the bacterium to exploit the host cytoplasmic ATP pool. We hypothesize that the A. haliana homolog of the R. prowazekii ATP/ADP translocase is the functional eukaryotic equivalent and resides in the plastid inner envelope membrane where it functions as an ATP importer.