Iron bound to low MW ligands: Interactions with mitochondria and cytosolic proteins

H. Zhan, R. K. Gupta, J. Weaver, Simeon Pollack

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The iron in the low MW pool of the cell is the precursor of iron in haem and is bound primarily to ATP. This precursor-product relationship suggested that reticulocytes might accumulate ATP-iron if their haem synthesis were blocked. However reticulocytes, treated with succinylacetone or rotenone and taking up iron from transferrin, accumulated iron in nonhaem cytosolic proteins and in mitochondria and not in the low MW pool. This was demonstrated by NMR and also by disrupting the cell with shear stress, separating the cytosol and pellet and fractionating the cytosol with ammonium sulfate. This constancy of the low MW iron pool in the face of blocked haem synthesis could not be explained by saturation of cytosolic ATP or by sluggish exchange of the low MW pool with other compartments. Rather, nonhaem cytosolic proteins and mitochondria appeared to have a higher affinity for iron and to exchange it rapidly with that in the low MW pool.

Original languageEnglish (US)
Pages (from-to)125-131
Number of pages7
JournalEuropean Journal of Haematology
Volume44
Issue number2
StatePublished - 1990

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Mitochondria
Iron
Ligands
Heme
Proteins
Adenosine Triphosphate
Reticulocytes
Cytosol
Rotenone
Ammonium Sulfate
Transferrin

ASJC Scopus subject areas

  • Hematology

Cite this

Zhan, H., Gupta, R. K., Weaver, J., & Pollack, S. (1990). Iron bound to low MW ligands: Interactions with mitochondria and cytosolic proteins. European Journal of Haematology, 44(2), 125-131.

Iron bound to low MW ligands : Interactions with mitochondria and cytosolic proteins. / Zhan, H.; Gupta, R. K.; Weaver, J.; Pollack, Simeon.

In: European Journal of Haematology, Vol. 44, No. 2, 1990, p. 125-131.

Research output: Contribution to journalArticle

Zhan, H, Gupta, RK, Weaver, J & Pollack, S 1990, 'Iron bound to low MW ligands: Interactions with mitochondria and cytosolic proteins', European Journal of Haematology, vol. 44, no. 2, pp. 125-131.
Zhan, H. ; Gupta, R. K. ; Weaver, J. ; Pollack, Simeon. / Iron bound to low MW ligands : Interactions with mitochondria and cytosolic proteins. In: European Journal of Haematology. 1990 ; Vol. 44, No. 2. pp. 125-131.
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