1. O., J. Simple allosteric model for membrane pumps. Nature 211, 969–970 (1966).
2. Drew, D. & Boudker, O. Shared Molecular Mechanisms of Membrane Transporters. Annu. Rev. Biochem. 85, 543–572 (2016).
3. Beinert, Holm & Münck; Iron-sulfur clusters: nature’s modular, multipurpose structures. Science (80-. ). 277, 653 (1997).
4. Balk, J. & Schaedler, T. A. Iron cofactor assembly in plants. Annu. Rev. Plant Biol. 65, 125–153 (2014).
5. Zhang, C. Essential functions of iron-requiring proteins in DNA replication, repair and cell cycle control. Protein Cell 5, 750–760 (2014).
6. White, M. F. & Dillingham, M. S. Iron-sulphur clusters in nucleic acid processing enzymes. Curr. Opin. Struct. Biol. 22, 94–100 (2012).
7. Rouault, T. A. Mammalian iron-sulphur proteins: Novel insights into biogenesis and function. Nat. Rev. Mol. Cell Biol. 16, 45–55 (2015).
8. Aust, S. D., Morehouse, L. A. & Thomas, C. E. Role of metals in oxygen radical reactions. J. Free Radicals Biol. Med. 1, 3–25 (1985).
9. Bogdan, A. R., Miyazawa, M., Hashimoto, K. & Tsuji, Y. Regulators of Iron homeostasis: new players in metabolism, cell death, and disease. Trends Biochem. Sci. 41, 274–286 (2016).
10. Ward, D. M. & Kaplan, J. Ferroportin-mediated iron transport: Expression and regulation. Biochim. Biophys. Acta - Mol. Cell Res. 1823, 1426–1433 (2012).
11. Curie, C. et al. Metal movement within the plant: contribution of nicotianamine and yellow stripe 1-like transporters. Ann. Bot. 103, 1–11 (2009).
12. Hider, R. C. & Kong, X. Chemistry and biology of siderophores. Nat. Prod. Rep. 27, 637 (2010).
13. Ana Álvarez-Fernández, Pablo Díaz-Benito, Anunciación Abadía, A.-F. L.-M. and J. A. Metal species involved in long distance metal transport in plants. Front. Plant Sci. 5, 105 (2014).
14. Sharma, S. S., Dietz, K. & Mimura, T. Vacuolar compartmentalization as indispensable component of heavy metal detoxification in plants. 1112–1126 (2016). doi:10.1111/pce.12706
15. Kim, S. A. et al. Localization of iron in Arabidopsis seed requires the vacuolar membrane transporter VIT1. Science 314, 1295–8 (2006).
16. Zhang, Y., Xu, Y., Yi, H. & Gong, J. Vacuolar membrane transporters OsVIT1 and OsVIT2 modulate iron translocation between flag leaves and seeds in rice. Plant J. 72, 400–10 (2012).
17. Momonoi, K. et al. A vacuolar iron transporter in tulip , TgVit1 , is responsible for blue coloration in petal cells through iron accumulation. 5, 437–447 (2009).
18. Narayanan, N. et al. Overexpression of Arabidopsis VIT1 increases accumulation of iron in cassava roots and stems. Plant Sci. 240, 170–181 (2015).
19. Connorton, J. M. et al. Wheat vacuolar iron transporter TaVIT2 transports Fe and Mn and is effective for biofortification. Plant Physiol. 174, 2434–2444 (2017).
20. De Steur, H. et al. Status and market potential of transgenic biofortified crops. Nat. Biotechnol. 33, 25–29 (2015).
21. Slavic, K. et al. A vacuolar iron-transporter homologue acts as a detoxifier in Plasmodium. Nat. Commun. 7, 10403 (2016).
22. John R.Giudicessi, BA.Michael J.Ackerman., 2013. Antimalarial drug resistance: a review of the biology and strategies to delay emergence and spread. Bone 23, 1–7 (2008).
23. Weiner, J. & Kooij, T. Phylogenetic profiles of all membrane transport proteins of the malaria parasite highlight new drug targets. Microb. Cell 3, 511–521 (2016).
24. Gollhofer, J., Timofeev, R., Lan, P., Schmidt, W. & Buckhout, T. J. Vacuolar- iron-transporter1-like proteins mediate iron homeostasis in arabidopsis. PLoS One 9, 1–8 (2014).
25. Bhubhanil, S. et al. Roles of Agrobacterium tumefaciens membrane-bound ferritin (MbfA) in iron transport and resistance to iron under acidic conditions. Microbiology 160, 863–871 (2014).
26. Labarbuta, P. et al. Recombinant vacuolar iron transporter family homologue PfVIT from human malaria-causing Plasmodium falciparum is a Fe2+/H+ exchanger. Sci. Rep. 7, 1–10 (2017).
27. Brachmann, C. B. et al. Designer deletion strains derived from Saccharomyces cerevisiae S288C: A useful set of strains and plasmids for PCR-mediated gene disruption and other applications. Yeast 14, 115–132 (1998).
28. Caffrey, M. Crystallizing membrane proteins for structure determination: use of lipidic mesophases. Annu. Rev. Biophys. 38, 29–51 (2009).
29. Hirata, K. et al. Zoo: An automatic data-collection system for high-throughput structure analysis in protein microcrystallography. Acta Crystallogr. Sect. D Struct. Biol. 75, 138–150 (2019).
30. Kabsch, W. Xds. Acta Crystallogr. Sect. D Biol. Crystallogr. 66, 125–132 (2010).
31. Yamashita, K., Hirata, K. & Yamamoto, M. KAMO: towards automated data processing for microcrystals. Acta Crystallogr. Sect. D Struct. Biol. 74, 441–449 (2018).
32. Foadi, J. et al. Clustering procedures for the optimal selection of data sets from multiple crystals in macromolecular crystallography. Acta Crystallogr. Sect. D Biol. Crystallogr. 69, 1617–1632 (2013).
33. Schneider, T. R. & Sheldrick, G. M. Substructure solution with SHELXD. Acta Crystallogr. Sect. D Biol. Crystallogr. 58, 1772–1779 (2002).
34. De La Fortelle, E. & Bricogne, G. Maximum-likelihood heavy-atom parameter refinement for multiple isomorphous replacement and multiwavelength anomalous diffraction methods. Methods Enzymol. 276, 472–494 (1997).
35. Adams, P. D. et al. PHENIX: Building new software for automated crystallographic structure determination. Acta Crystallogr. Sect. D Biol. Crystallogr. 58, 1948–1954 (2002).
36. Emsley, P., Lohkamp, B., Scott, W. G. & Cowtan, K. Features and development of Coot. Acta Crystallogr. Sect. D Biol. Crystallogr. 66, 486–501 (2010).
37. Sheldrick, G. M. A short history of SHELX. Acta Crystallogr. Sect. A Found. Crystallogr. 64, 112–122 (2008).
38. Thorn, A. & Sheldrick, G. M. ANODE: Anomalous and heavy-atom density calculation. J. Appl. Crystallogr. 44, 1285–1287 (2011).
39. Murshudov, G. N. et al. REFMAC5 for the refinement of macromolecular crystal structures. Acta Crystallogr. Sect. D Biol. Crystallogr. 67, 355–367 (2011).
40. Li, L., Chen, O. S., Ward, D. M. & Kaplan, J. CCC1 is a transporter that mediates vacuolar iron storage in yeast. J. Biol. Chem. 276, 29515–29519 (2001).
41. Ehrnstorfer, I. A., Geertsma, E. R., Pardon, E., Steyaert, J. & Dutzler, R. Crystal structure of a SLC11 ( NRAMP ) transporter reveals the basis for transition-metal ion transport. Nat. Struct. Mol. Biol. 21, 990–996 (2014).
42. Taniguchi, R. et al. Outward- and inward-facing structures of a putative bacterial transition-metal transporter with homology to ferroportin. Nat. Commun. 6, 8545 (2015).
43. Parker, J. L., Mindell, J. A. & Newstead, S. Thermodynamic evidence for a dual transport mechanism in a POT peptide transporter. Elife 3, 1–13 (2014).
44. Shen, J. et al. Organelle pH in the arabidopsis endomembrane system. Mol. Plant 6, 1419–1437 (2013).
45. Saoudi, N., Latcu, D. G., Rinaldi, J. P. & Ricard, P. Graphical analysis of pH- dependent properties of proteins predicted using PROPKA. Bull. Acad. Natl. Med. 192, 1029–1041 (2011).
46. Nieboer, E. & Richardson, D. H. S. The replacement of the nondescript term ‘heavy metals’ by a biologically and chemically significant classification of metal ions. Environ. Pollution. Ser. B, Chem. Phys. 1, 3–26 (1980).
47. Ehrnstorfer, I. A., Manatschal, C., Arnold, F. M., Laederach, J. & Dutzler, R. Structural and mechanistic basis of proton-coupled metal ion transport in the SLC11/NRAMP family. Nat. Commun. 8, 14033 (2017).
48. Bozzi, A. T. et al. Conserved methionine dictates substrate preference in Nramp- family divalent metal transporters. Proc. Natl. Acad. Sci. 113, 10310–10315 (2016).
49. Narayanan, N. et al. Biofortification of field-grown cassava by engineering expression of an iron transporter and ferritin. Nat. Biotechnol. 37, 144–151 (2019).
50. Okazaki, K. ichi et al. Mechanism of the electroneutral sodium/proton antiporter PaNhaP from transition-path shooting. Nat. Commun. 10, 1–10 (2019).
51. Ruel, M. T. & Alderman, H. Nutrition-sensitive interventions and programmes: How can they help to accelerate progress in improving maternal and child nutrition? Lancet 382, 536–551 (2013).
52. De Steur, H. et al. Status and market potential of transgenic biofortified crops. Nat. Biotechnol. 33, 25–29 (2015).
53. Hefferon, K. L. Nutritionally enhanced food crops; progress and perspectives. Int. J. Mol. Sci. 16, 3895–3914 (2015).