1EKG

MATURE HUMAN FRATAXIN

Summary for 1EKG

• Entry DOI: 10.2210/pdb1ekg/pdb
• Descriptor: FRATAXIN (2 entities in total)
• Functional Keywords: freidreich's ataxia, iron transport, mitochondrial, disease, metal transport
• Biological source: Homo sapiens (human)
• Cellular location: Mitochondrion : Q16595
• Total number of polymer chains: 1
• Total formula weight: 14045.49

Authors

Dhe-Paganon, S.,Shigeta, R.,Chi, Y.I.,Ristow, M.,Shoelson, S.E. (deposition date: 2000-03-08, release date: 2000-11-08, Last modification date: 2024-02-07)

Primary citation

Dhe-Paganon, S.,Shigeta, R.,Chi, Y.I.,Ristow, M.,Shoelson, S.E.
Crystal structure of human frataxin.
J.Biol.Chem., 275:30753-30756, 2000

PubMed Abstract: Friedreich's ataxia, an autosomal recessive neurodegenerative disorder characterized by progressive gait and limb ataxia, cardiomyopathy, and diabetes mellitus, is caused by decreased frataxin production or function. The structure of human frataxin, which we have determined at 1.8-A resolution, reveals a novel protein fold. A five-stranded, antiparallel beta sheet provides a flat platform, which supports a pair of parallel alpha helices, to form a compact alphabeta sandwich. A cluster of 12 acidic residues from the first helix and the first strand of the large sheet form a contiguous anionic surface on the protein. The overall protein structure and the anionic patch are conserved in eukaryotes, including animals, plants, and yeast, and in prokaryotes. Additional conserved residues create an extended 1008-A(2) patch on a distinct surface of the protein. Side chains of disease-associated mutations either contribute to the anionic patch, help create the second conserved surface, or point toward frataxin's hydrophobic core. These structural findings predict potential modes of protein-protein and protein-iron binding.

PubMed: 10900192
DOI: 10.1074/jbc.C000407200

Experimental method

X-RAY DIFFRACTION (1.8 Å)