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2bzm
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bzm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bzm OCA], [http://www.ebi.ac.uk/pdbsum/2bzm PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2bzm RCSB]</span> | ||
}} | }} | ||
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==Overview== | ==Overview== | ||
Mutations and polymorphisms in the regulator of complement activation, factor H, have been linked to atypical hemolytic uremic syndrome (aHUS), membranoproliferative glomerulonephritis, and age-related macular degeneration. Many aHUS patients carry mutations in the two C-terminal modules of factor H, which normally confer upon this abundant 155-kDa plasma glycoprotein its ability to selectively bind self-surfaces and prevent them from inappropriately triggering the complement cascade via the alternative pathway. In the current study, the three-dimensional solution structure of the C-terminal module pair of factor H has been determined. A binding site for a fully sulfated heparin-derived tetrasaccharide has been delineated using chemical shift mapping and the C3d/C3b-binding site inferred from sequence comparisons and computational docking. The resultant information allows assessment of the likely consequences of aHUS-associated amino acid substitutions in this critical region of factor H. It is striking that, excepting those likely to perturb the three-dimensional structure, aHUS-associated missense mutations congregate in the polyanion-binding site delineated in this study, thus potentially disrupting a vital mechanism for control of complement on self-surfaces in the microvasculature of the kidney. It is intriguing that a single nucleotide polymorphism predisposing to age-related macular degeneration occupies another region of factor H that harbors a polyanion-binding site. | Mutations and polymorphisms in the regulator of complement activation, factor H, have been linked to atypical hemolytic uremic syndrome (aHUS), membranoproliferative glomerulonephritis, and age-related macular degeneration. Many aHUS patients carry mutations in the two C-terminal modules of factor H, which normally confer upon this abundant 155-kDa plasma glycoprotein its ability to selectively bind self-surfaces and prevent them from inappropriately triggering the complement cascade via the alternative pathway. In the current study, the three-dimensional solution structure of the C-terminal module pair of factor H has been determined. A binding site for a fully sulfated heparin-derived tetrasaccharide has been delineated using chemical shift mapping and the C3d/C3b-binding site inferred from sequence comparisons and computational docking. The resultant information allows assessment of the likely consequences of aHUS-associated amino acid substitutions in this critical region of factor H. It is striking that, excepting those likely to perturb the three-dimensional structure, aHUS-associated missense mutations congregate in the polyanion-binding site delineated in this study, thus potentially disrupting a vital mechanism for control of complement on self-surfaces in the microvasculature of the kidney. It is intriguing that a single nucleotide polymorphism predisposing to age-related macular degeneration occupies another region of factor H that harbors a polyanion-binding site. | ||
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| - | ==Disease== | ||
| - | Known diseases associated with this structure: Complement factor H deficiency OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134370 134370]], Factor H and factor H-like 1 OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134370 134370]], Hemolytic-uremic syndrome OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134370 134370]], Macular degeneration, age-related, 4 OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134370 134370]], Membranoproliferative glomerulonephritis with CFH deficiency OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=134370 134370]] | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Pangburn, M K.]] | [[Category: Pangburn, M K.]] | ||
[[Category: Uhrin, D.]] | [[Category: Uhrin, D.]] | ||
| - | + | [[Category: factor h,complement,hus,heparin,polyanions,immune response]] | |
| - | + | [[Category: innate immunity,complement alternate pathway,immune system]] | |
| - | [[Category: factor h | + | |
| - | + | ||
| - | + | ||
| - | + | ||
| - | [[Category: immune system | + | |
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| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:14:13 2008'' |
Revision as of 23:14, 30 March 2008
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
SOLUTION STRUCTURE OF THE PRIMARY HOST RECOGNITION REGION OF COMPLEMENT FACTOR H
Overview
Mutations and polymorphisms in the regulator of complement activation, factor H, have been linked to atypical hemolytic uremic syndrome (aHUS), membranoproliferative glomerulonephritis, and age-related macular degeneration. Many aHUS patients carry mutations in the two C-terminal modules of factor H, which normally confer upon this abundant 155-kDa plasma glycoprotein its ability to selectively bind self-surfaces and prevent them from inappropriately triggering the complement cascade via the alternative pathway. In the current study, the three-dimensional solution structure of the C-terminal module pair of factor H has been determined. A binding site for a fully sulfated heparin-derived tetrasaccharide has been delineated using chemical shift mapping and the C3d/C3b-binding site inferred from sequence comparisons and computational docking. The resultant information allows assessment of the likely consequences of aHUS-associated amino acid substitutions in this critical region of factor H. It is striking that, excepting those likely to perturb the three-dimensional structure, aHUS-associated missense mutations congregate in the polyanion-binding site delineated in this study, thus potentially disrupting a vital mechanism for control of complement on self-surfaces in the microvasculature of the kidney. It is intriguing that a single nucleotide polymorphism predisposing to age-related macular degeneration occupies another region of factor H that harbors a polyanion-binding site.
About this Structure
2BZM is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Disease-associated sequence variations congregate in a polyanion recognition patch on human factor H revealed in three-dimensional structure., Herbert AP, Uhrin D, Lyon M, Pangburn MK, Barlow PN, J Biol Chem. 2006 Jun 16;281(24):16512-20. Epub 2006 Mar 13. PMID:16533809
Page seeded by OCA on Mon Mar 31 02:14:13 2008
