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Increase in the adenine nucleotide translocase content of duckling subsarcolemmal mitochondria during cold acclimation
Author(s) -
Roussel Damien,
Chainier François,
Rouanet Jean-Louis,
Barré Hervé
Publication year - 2000
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(00)01790-7
Subject(s) - ant , mitochondrion , atp–adp translocase , translocase , biology , adenine nucleotide , acclimatization , biochemistry , chemistry , inner mitochondrial membrane , nucleotide , botany , ecology , gene , chromosomal translocation
Intermyofibrillar and subsarcolemmal mitochondria were isolated from duckling gastrocnemius muscle. The adenine nucleotide translocase (ANT) content of subsarcolemmal mitochondria was found to be half of that present in intermyofibrillar mitochondria. In addition, cold acclimation resulted in a 1.7‐fold increase in subsarcolemmal mitochondrial ANT content, with intermyofibrillar mitochondrial ANT remaining constant. This change in mitochondrial ANT content correlates with the previously reported cold‐induced change in the sensitivity of mitochondria to palmitate‐inhibited ATP synthesis [Roussel et al. (1998) FEBS Lett. 439, 258–262]. It is suggested that the mitochondrial ANT content enhances or reduces the fatty acid uncoupling activity in tissue, depending on the energetic state of mitochondria.