4NTO
Crystal structure of D60A mutant of Arabidopsis ACD11 (accelerated-cell-death 11) complexed with C2 ceramide-1-phosphate (d18:1/2:0) at 2.15 Angstrom resolution
Summary for 4NTO
| Entry DOI | 10.2210/pdb4nto/pdb |
| Related | 4NT1 4NT2 4NTG 4NTI |
| Descriptor | accelerated-cell-death 11, (2S,3R,4E)-2-(acetylamino)-3-hydroxyoctadec-4-en-1-yl dihydrogen phosphate, DI(HYDROXYETHYL)ETHER, ... (4 entities in total) |
| Functional Keywords | protein-lipid complexes, pi-bulge, gltp-fold, lipid transfer protein, cell death, ceramide-1-phosphate, c1p, transport protein |
| Biological source | Arabidopsis thaliana (mouse-ear cress) |
| Total number of polymer chains | 3 |
| Total formula weight | 71001.70 |
| Authors | Simanshu, D.K.,Brown, R.E.,Patel, D.J. (deposition date: 2013-12-02, release date: 2014-02-05, Last modification date: 2023-09-20) |
| Primary citation | Simanshu, D.K.,Zhai, X.,Munch, D.,Hofius, D.,Markham, J.E.,Bielawski, J.,Bielawska, A.,Malinina, L.,Molotkovsky, J.G.,Mundy, J.W.,Patel, D.J.,Brown, R.E. Arabidopsis Accelerated Cell Death 11, ACD11, Is a Ceramide-1-Phosphate Transfer Protein and Intermediary Regulator of Phytoceramide Levels. Cell Rep, 6:388-399, 2014 Cited by PubMed Abstract: The accelerated cell death 11 (acd11) mutant of Arabidopsis provides a genetic model for studying immune response activation and localized cellular suicide that halt pathogen spread during infection in plants. Here, we elucidate ACD11 structure and function and show that acd11 disruption dramatically alters the in vivo balance of sphingolipid mediators that regulate eukaryotic-programmed cell death. In acd11 mutants, normally low ceramide-1-phosphate (C1P) levels become elevated, but the relatively abundant cell death inducer phytoceramide rises acutely. ACD11 exhibits selective intermembrane transfer of C1P and phyto-C1P. Crystal structures establish C1P binding via a surface-localized, phosphate headgroup recognition center connected to an interior hydrophobic pocket that adaptively ensheaths lipid chains via a cleft-like gating mechanism. Point mutation mapping confirms functional involvement of binding site residues. A π helix (π bulge) near the lipid binding cleft distinguishes apo-ACD11 from other GLTP folds. The global two-layer, α-helically dominated, "sandwich" topology displaying C1P-selective binding identifies ACD11 as the plant prototype of a GLTP fold subfamily. PubMed: 24412362DOI: 10.1016/j.celrep.2013.12.023 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.152 Å) |
Structure validation
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