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1a6z
From Proteopedia
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HFE (HUMAN) HEMOCHROMATOSIS PROTEIN
Contents |
Overview
HFE is an MHC-related protein that is mutated in the iron-overload disease hereditary hemochromatosis. HFE binds to transferrin receptor (TfR) and reduces its affinity for iron-loaded transferrin, implicating HFE in iron metabolism. The 2.6 A crystal structure of HFE reveals the locations of hemochromatosis mutations and a patch of histidines that could be involved in pH-dependent interactions. We also demonstrate that soluble TfR and HFE bind tightly at the basic pH of the cell surface, but not at the acidic pH of intracellular vesicles. TfR:HFE stoichiometry (2:1) differs from TfR:transferrin stoichiometry (2:2), implying a different mode of binding for HFE and transferrin to TfR, consistent with our demonstration that HFE, transferrin, and TfR form a ternary complex.
Disease
Known diseases associated with this structure: Hemochromatosis OMIM:[235200], Hypoproteinemia, hypercatabolic OMIM:[109700], Porphyria variegata OMIM:[235200]
About this Structure
1A6Z is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of the hemochromatosis protein HFE and characterization of its interaction with transferrin receptor., Lebron JA, Bennett MJ, Vaughn DE, Chirino AJ, Snow PM, Mintier GA, Feder JN, Bjorkman PJ, Cell. 1998 Apr 3;93(1):111-23. PMID:9546397
Page seeded by OCA on Thu Feb 21 11:41:32 2008
