8DL6

Cryo-EM structure of human ferroportin/slc40 bound to Ca2+ in nanodisc

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Homo sapiens, Mus musculus
  • Expression System: Spodoptera frugiperda
  • Mutation(s): No 
  • Membrane Protein: Yes  PDBTM

  • Deposited: 2022-07-07 Released: 2023-01-25 
  • Deposition Author(s): Shen, J., Wilbon, A.S., Pan, Y., Zhou, M.
  • Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), Cancer Prevention and Research Institute of Texas (CPRIT)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Mechanism of Ca 2+ transport by ferroportin.

Shen, J.Wilbon, A.S.Zhou, M.Pan, Y.

(2023) Elife 12

  • DOI: 10.7554/eLife.82947
  • Primary Citation of Related Structures:  
    8DL6

  • PubMed Abstract: 
  • Ferroportin (Fpn) is a transporter that releases ferrous ion (Fe 2+ ) from cells and is important for homeostasis of iron in circulation. Export of one Fe 2+ by Fpn is coupled to import of two H + to maintain charge balance ...

    Ferroportin (Fpn) is a transporter that releases ferrous ion (Fe 2+ ) from cells and is important for homeostasis of iron in circulation. Export of one Fe 2+ by Fpn is coupled to import of two H + to maintain charge balance. Here, we show that human Fpn (HsFpn) binds to and mediates Ca 2+ transport. We determine the structure of Ca 2+ -bound HsFpn and identify a single Ca 2+ binding site distinct from the Fe 2+ binding sites. Further studies validate the Ca 2+ binding site and show that Ca 2+ transport is not coupled to transport of another ion. In addition, Ca 2+ transport is significantly inhibited in the presence of Fe 2+ but not vice versa. Function of Fpn as a Ca 2+ uniporter may allow regulation of iron homeostasis by Ca 2+ .


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, United States.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Solute carrier family 40 member 1A577Homo sapiensMutation(s): 0 
Gene Names: SLC40A1FPN1IREG1SLC11A3MSTP079
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NP59 (Homo sapiens)
Explore Q9NP59 
Go to UniProtKB:  Q9NP59
PHAROS:  Q9NP59
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NP59
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
11F9 light-chainB [auth C]213Mus musculusMutation(s): 0 
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Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
11F9 heavy-chainC [auth D]238Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA (Subject of Investigation/LOI)
Query on CA

Download Ideal Coordinates CCD File 
D [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesDK122784
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesHL086392
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesHL157473
Cancer Prevention and Research Institute of Texas (CPRIT)United StatesR1223

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-25
    Type: Initial release