1fha

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[[Image:1fha.gif|left|200px]]
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==Overview==
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{{ABSTRACT_1992356}}
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Ferritin is important in iron homeostasis. Its twenty-four chains of two types, H and L, assemble as a hollow shell providing an iron-storage cavity. Ferritin molecules in cells containing high levels of iron tend to be rich in L chains, and may have a long-term storage function, whereas H-rich ferritins are more active in iron metabolism. The molecular basis for the greater activity of H-rich ferritins has until now been obscure, largely because the structure of H-chain ferritin has remained unknown owing to the difficulties in obtaining crystals ordered enough for X-ray crystallographic analysis. Here we report the three-dimensional structure of a human ferritin H-chain homopolymer. By genetically engineering a change in the sequence of the intermolecular contact region, we obtained crystals isomorphous with the homologous rat L ferritin and of high enough quality for X-ray diffraction analysis. The X-ray structure of human H ferritin shows a novel metal site embedded within each of its four-helix bundles and we suggest that ferroxidase activity associated with this site accounts for its rapid uptake of iron.
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==About this Structure==
==About this Structure==
1FHA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The following page contains interesting information on the relation of 1FHA with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb35_1.html Ferritin and Transferrin]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FHA OCA].
1FHA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The following page contains interesting information on the relation of 1FHA with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb35_1.html Ferritin and Transferrin]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FHA OCA].
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==Reference==
 
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Solving the structure of human H ferritin by genetically engineering intermolecular crystal contacts., Lawson DM, Artymiuk PJ, Yewdall SJ, Smith JM, Livingstone JC, Treffry A, Luzzago A, Levi S, Arosio P, Cesareni G, et al., Nature. 1991 Feb 7;349(6309):541-4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1992356 1992356]
 
[[Category: Ferritin and Transferrin]]
[[Category: Ferritin and Transferrin]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Harrison, P M.]]
[[Category: Harrison, P M.]]
[[Category: Iron storage]]
[[Category: Iron storage]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:19:21 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jun 26 17:19:39 2008''

Revision as of 14:19, 26 June 2008

Image:1fha.png

Template:STRUCTURE 1fha

SOLVING THE STRUCTURE OF HUMAN H FERRITIN BY GENETICALLY ENGINEERING INTERMOLECULAR CRYSTAL CONTACTS


Template:ABSTRACT 1992356

About this Structure

1FHA is a Single protein structure of sequence from Homo sapiens. The following page contains interesting information on the relation of 1FHA with [Ferritin and Transferrin]. Full crystallographic information is available from OCA.

Page seeded by OCA on Thu Jun 26 17:19:39 2008

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