7S7G
Crystal Structure Analysis of Human VLCAD
Summary for 7S7G
| Entry DOI | 10.2210/pdb7s7g/pdb |
| Descriptor | Very long-chain specific acyl-CoA dehydrogenase, mitochondrial, FLAVIN-ADENINE DINUCLEOTIDE (3 entities in total) |
| Functional Keywords | dehydrogenase, mitochondrial acyl-coa dehydrogenases, flavin adenine dinucleotide, deficiency, fatty acid oxidation, oxidoreductase |
| Biological source | Homo sapiens (Human) |
| Total number of polymer chains | 1 |
| Total formula weight | 67611.99 |
| Authors | Seo, H.-S.,Dhe-Paganon, S. (deposition date: 2021-09-15, release date: 2022-09-28, Last modification date: 2024-05-29) |
| Primary citation | Prew, M.S.,Camara, C.M.,Botzanowski, T.,Moroco, J.A.,Bloch, N.B.,Levy, H.R.,Seo, H.S.,Dhe-Paganon, S.,Bird, G.H.,Herce, H.D.,Gygi, M.A.,Escudero, S.,Wales, T.E.,Engen, J.R.,Walensky, L.D. Structural basis for defective membrane targeting of mutant enzyme in human VLCAD deficiency. Nat Commun, 13:3669-3669, 2022 Cited by PubMed Abstract: Very long-chain acyl-CoA dehydrogenase (VLCAD) is an inner mitochondrial membrane enzyme that catalyzes the first and rate-limiting step of long-chain fatty acid oxidation. Point mutations in human VLCAD can produce an inborn error of metabolism called VLCAD deficiency that can lead to severe pathophysiologic consequences, including cardiomyopathy, hypoglycemia, and rhabdomyolysis. Discrete mutations in a structurally-uncharacterized C-terminal domain region of VLCAD cause enzymatic deficiency by an incompletely defined mechanism. Here, we conducted a structure-function study, incorporating X-ray crystallography, hydrogen-deuterium exchange mass spectrometry, computational modeling, and biochemical analyses, to characterize a specific membrane interaction defect of full-length, human VLCAD bearing the clinically-observed mutations, A450P or L462P. By disrupting a predicted α-helical hairpin, these mutations either partially or completely impair direct interaction with the membrane itself. Thus, our data support a structural basis for VLCAD deficiency in patients with discrete mutations in an α-helical membrane-binding motif, resulting in pathologic enzyme mislocalization. PubMed: 35760926DOI: 10.1038/s41467-022-31466-2 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.34 Å) |
Structure validation
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