Download MendeleyStructure of human ferritin L chain.
Wang, Z., Li, C., Ellenburg, M., Soistman, E., Ruble, J., Wright, B., Ho, J.X., Carter, D.C.(2006) Acta Crystallogr D Biol Crystallogr 62: 800-806
- PubMed: 16790936
- DOI: https://doi.org/10.1107/S0907444906018294
- Primary Citation of Related Structures:
2FFX, 2FG4, 2FG8 - PubMed Abstract:
Ferritin is the major iron-storage protein present in all cells. It generally contains 24 subunits, with different ratios of heavy chain (H) to light chain (L), in the shape of a hollow sphere hosting up to 4500 ferric Fe atoms inside. H-rich ferritins catalyse the oxidation of iron(II), while L-rich ferritins promote the nucleation and storage of iron(III). Several X-ray structures have been determined, including those of L-chain ferritins from horse spleen (HoSF), recombinant L-chain ferritins from horse (HoLF), mouse (MoLF) and bullfrog (BfLF) as well as recombinant human H-chain ferritin (HuHF). Here, structures have been determined of two crystal forms of recombinant human L-chain ferritin (HuLF) obtained from native and perdeuterated proteins. The structures show a cluster of acidic residues at the ferrihydrite nucleation site and at the iron channel along the threefold axis. An ordered Cd2+ structure is observed within the iron channel, offering further insight into the route and mechanism of iron transport into the capsid. The loop between helices D and E, which is disordered in many other L-chain structures, is clearly visible in these two structures. The crystals generated from perdeuterated HuLF will be used for neutron diffraction studies.
Organizational Affiliation:
New Century Pharmaceuticals Inc., 895 Martin Road, Huntsville, Alabama 35824, USA.
