ジャーナル: Commun Biol / 年: 2022 タイトル: Structures of the human peroxisomal fatty acid transporter ABCD1 in a lipid environment. 著者: Le Thi My Le / James Robert Thompson / Phuoc Xuan Dang / Janarjan Bhandari / Amer Alam / 要旨: The peroxisomal very long chain fatty acid (VLCFA) transporter ABCD1 is central to fatty acid catabolism and lipid biosynthesis. Its dysfunction underlies toxic cytosolic accumulation of VLCFAs, ...The peroxisomal very long chain fatty acid (VLCFA) transporter ABCD1 is central to fatty acid catabolism and lipid biosynthesis. Its dysfunction underlies toxic cytosolic accumulation of VLCFAs, progressive demyelination, and neurological impairments including X-linked adrenoleukodystrophy (X-ALD). We present cryo-EM structures of ABCD1 in phospholipid nanodiscs in a nucleotide bound conformation open to the peroxisomal lumen and an inward facing conformation open to the cytosol at up to 3.5 Å resolution, revealing details of its transmembrane cavity and ATP dependent conformational spectrum. We identify features distinguishing ABCD1 from its closest homologs and show that coenzyme A (CoA) esters of VLCFAs modulate ABCD1 activity in a species dependent manner. Our data suggest a transport mechanism where the CoA moieties of VLCFA-CoAs enter the hydrophilic transmembrane domain while the acyl chains extend out into the surrounding membrane bilayer. The structures help rationalize disease causing mutations and may aid ABCD1 targeted structure-based drug design.
全体 : Human ABCD1 in Porcine BPL/Ch/MSP1D1 nanodiscs
全体
名称: Human ABCD1 in Porcine BPL/Ch/MSP1D1 nanodiscs
要素
複合体: Human ABCD1 in Porcine BPL/Ch/MSP1D1 nanodiscs
タンパク質・ペプチド: ATP-binding cassette sub-family D member 1
リガンド: UNKNOWN LIGAND
リガンド: CHOLESTEROL
リガンド: MAGNESIUM ION
リガンド: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
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超分子 #1: Human ABCD1 in Porcine BPL/Ch/MSP1D1 nanodiscs
超分子
名称: Human ABCD1 in Porcine BPL/Ch/MSP1D1 nanodiscs / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 詳細: Human ABCD1 recombinantly expressed in HEK293 TREX cell line and reconstituted in MSP1D1 nanodiscs comprising 4:1 mixture of Porcine Brain Polar Lipids:Cholesterol. The reported molecular ...詳細: Human ABCD1 recombinantly expressed in HEK293 TREX cell line and reconstituted in MSP1D1 nanodiscs comprising 4:1 mixture of Porcine Brain Polar Lipids:Cholesterol. The reported molecular weight of 0.0829 MDa is for the monomer. The assembly is a homodimer. The dimer was confirmed using SEC.