1dvn
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= UMBILICAL VEIN ENDOTHELIUM LIBRARY ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= UMBILICAL VEIN ENDOTHELIUM LIBRARY ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1dvm|1DVM]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dvn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dvn OCA], [http://www.ebi.ac.uk/pdbsum/1dvn PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dvn RCSB]</span> | ||
}} | }} | ||
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==Overview== | ==Overview== | ||
Serpins exhibit a range of physiological roles and can contribute to certain disease states dependent on their various conformations. Understanding the mechanisms of the large-scale conformational reorganizations of serpins may lead to a better understanding of their roles in various cardiovascular diseases. We have studied the serpin, plasminogen activator inhibitor 1 (PAI-1), in both the active and the latent state and found that anionic halide ions may play a role in the active-to-latent structural transition. Crystallographic analysis of a stable mutant form of active PAI-1 identified an anion-binding site between the central beta-sheet and a small surface domain. A chloride ion was modeled in this site, and its identity was confirmed by soaking crystals in a bromide-containing solution and calculating a crystallographic difference map. The anion thus located forms a 4-fold ligated linchpin that tethers the surface domain to the central beta-sheet into which the reactive center loop must insert during the active-to-latent transition. Timecourse experiments measuring active PAI-1 stability in the presence of various halide ions showed a clear trend for stabilization of the active form with F(-) > Cl(-) > Br(-) >> I(-). We propose that the "stickiness" of this pin (i.e., the electronegativity of the anion) contributes to the energetics of the active-to-latent transition in the PAI-1 serpin. | Serpins exhibit a range of physiological roles and can contribute to certain disease states dependent on their various conformations. Understanding the mechanisms of the large-scale conformational reorganizations of serpins may lead to a better understanding of their roles in various cardiovascular diseases. We have studied the serpin, plasminogen activator inhibitor 1 (PAI-1), in both the active and the latent state and found that anionic halide ions may play a role in the active-to-latent structural transition. Crystallographic analysis of a stable mutant form of active PAI-1 identified an anion-binding site between the central beta-sheet and a small surface domain. A chloride ion was modeled in this site, and its identity was confirmed by soaking crystals in a bromide-containing solution and calculating a crystallographic difference map. The anion thus located forms a 4-fold ligated linchpin that tethers the surface domain to the central beta-sheet into which the reactive center loop must insert during the active-to-latent transition. Timecourse experiments measuring active PAI-1 stability in the presence of various halide ions showed a clear trend for stabilization of the active form with F(-) > Cl(-) > Br(-) >> I(-). We propose that the "stickiness" of this pin (i.e., the electronegativity of the anion) contributes to the energetics of the active-to-latent transition in the PAI-1 serpin. | ||
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| - | ==Disease== | ||
| - | Known diseases associated with this structure: Hemorrhagic diathesis due to PAI1 deficiency OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=173360 173360]], Thrombophilia due to excessive plasminogen activator inhibitor OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=173360 173360]] | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: serpin]] | [[Category: serpin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:49:37 2008'' |
Revision as of 16:49, 30 March 2008
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| , resolution 2.10Å | |||||||
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| Gene: | UMBILICAL VEIN ENDOTHELIUM LIBRARY (Homo sapiens) | ||||||
| Related: | 1DVM
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
LATENT FORM OF PLASMINOGEN ACTIVATOR INHIBITOR-1 (PAI-1)
Overview
Serpins exhibit a range of physiological roles and can contribute to certain disease states dependent on their various conformations. Understanding the mechanisms of the large-scale conformational reorganizations of serpins may lead to a better understanding of their roles in various cardiovascular diseases. We have studied the serpin, plasminogen activator inhibitor 1 (PAI-1), in both the active and the latent state and found that anionic halide ions may play a role in the active-to-latent structural transition. Crystallographic analysis of a stable mutant form of active PAI-1 identified an anion-binding site between the central beta-sheet and a small surface domain. A chloride ion was modeled in this site, and its identity was confirmed by soaking crystals in a bromide-containing solution and calculating a crystallographic difference map. The anion thus located forms a 4-fold ligated linchpin that tethers the surface domain to the central beta-sheet into which the reactive center loop must insert during the active-to-latent transition. Timecourse experiments measuring active PAI-1 stability in the presence of various halide ions showed a clear trend for stabilization of the active form with F(-) > Cl(-) > Br(-) >> I(-). We propose that the "stickiness" of this pin (i.e., the electronegativity of the anion) contributes to the energetics of the active-to-latent transition in the PAI-1 serpin.
About this Structure
1DVN is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structures of active and latent PAI-1: a possible stabilizing role for chloride ions., Stout TJ, Graham H, Buckley DI, Matthews DJ, Biochemistry. 2000 Jul 25;39(29):8460-9. PMID:10913251
Page seeded by OCA on Sun Mar 30 19:49:37 2008
Categories: Homo sapiens | Single protein | Buckley, D I. | Graham, H. | Matthews, D J. | Stout, T J. | Inhibitor | Pai-1 | Serpin
