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TitleStructural and functional properties of a plant NRAMP-related aluminum transporter.
Journal, issue, pagesElife, Vol. 12, Year 2023
Publish dateApr 19, 2023
AuthorsKarthik Ramanadane / Márton Liziczai / Dragana Markovic / Monique S Straub / Gian T Rosalen / Anto Udovcic / Raimund Dutzler / Cristina Manatschal /
PubMed AbstractThe transport of transition metal ions by members of the SLC11/NRAMP family constitutes a ubiquitous mechanism for the uptake of Fe and Mn across all kingdoms of life. Despite the strong conservation ...The transport of transition metal ions by members of the SLC11/NRAMP family constitutes a ubiquitous mechanism for the uptake of Fe and Mn across all kingdoms of life. Despite the strong conservation of the family, two of its branches have evolved a distinct substrate preference with one mediating Mg uptake in prokaryotes and another the transport of Al into plant cells. Our previous work on the SLC11 transporter from revealed the basis for its Mg selectivity (Ramanadane et al., 2022). Here, we have addressed the structural and functional properties of a putative Al transporter from . We show that the protein transports diverse divalent metal ions and binds the trivalent ions Al and Ga, which are both presumable substrates. Its cryo-electron microscopy (cryo-EM) structure displays an occluded conformation that is closer to an inward- than an outward-facing state, with a binding site that is remodeled to accommodate the increased charge density of its transported substrate.
External linksElife / PubMed:37074929 / PubMed Central
MethodsEM (single particle)
Resolution3.66 Å
Structure data

17000

8ont

EMDB-17000, PDB-8ont:
Structure of Setaria italica NRAT in complex with a nanobody
Method: EM (single particle) / Resolution: 3.66 Å

Chemicals

ChemComp-PLC:
DIUNDECYL PHOSPHATIDYL CHOLINE / phospholipid*YM

ChemComp-HOH:
WATER / Water

Source
  • setaria italica (foxtail millet)
  • lama glama (llama)
KeywordsTRANSPORT PROTEIN / NRAT / NRAMP / SLC11 / Metal uptake / Aluminium transporter

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