1as4
From Proteopedia
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| - | [[Image:1as4.jpg|left|200px]] | + | [[Image:1as4.jpg|left|200px]] |
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| - | '''CLEAVED ANTICHYMOTRYPSIN A349R''' | + | {{Structure |
| + | |PDB= 1as4 |SIZE=350|CAPTION= <scene name='initialview01'>1as4</scene>, resolution 2.1Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=ACT:ACETATE ION'>ACT</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= ACT ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | }} | ||
| + | |||
| + | '''CLEAVED ANTICHYMOTRYPSIN A349R''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1AS4 is a [ | + | 1AS4 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AS4 OCA]. |
==Reference== | ==Reference== | ||
| - | Engineering an anion-binding cavity in antichymotrypsin modulates the "spring-loaded" serpin-protease interaction., Lukacs CM, Rubin H, Christianson DW, Biochemistry. 1998 Mar 10;37(10):3297-304. PMID:[http:// | + | Engineering an anion-binding cavity in antichymotrypsin modulates the "spring-loaded" serpin-protease interaction., Lukacs CM, Rubin H, Christianson DW, Biochemistry. 1998 Mar 10;37(10):3297-304. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9521649 9521649] |
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: serpin]] | [[Category: serpin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:01:41 2008'' |
Revision as of 08:01, 20 March 2008
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| , resolution 2.1Å | |||||||
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| Ligands: | |||||||
| Gene: | ACT (Homo sapiens) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CLEAVED ANTICHYMOTRYPSIN A349R
Contents |
Overview
Expressed in a kinetically trapped folding state, a serpin couples the thermodynamic driving force of a massive beta-sheet rearrangement to the inhibition of a target protease. Hence, the serpin-protease interaction is the premier example of a "spring-loaded" protein-protein interaction. Amino acid substitutions in the hinge region of a serpin reactive loop can weaken the molecular spring, which converts the serpin from an inhibitor into a substrate. To probe the molecular basis of this conversion, we report the crystal structure of A349R antichymotrypsin in the reactive loop cleaved state at 2.1 A resolution. This amino acid substitution does not block the beta-sheet rearrangement despite the burial of R349 in the hydrophobic core of the cleaved serpin along with a salt-linked acetate ion. The inhibitory activity of this serpin variant is not obliterated; remarkably, its inhibitory properties are anion-dependent due to the creation of an anion-binding cavity in the cleaved serpin.
Disease
Known diseases associated with this structure: Alpha-1-antichymotrypsin deficiency OMIM:[107280], Cerebrovascular disease, occlusive OMIM:[107280]
About this Structure
1AS4 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Engineering an anion-binding cavity in antichymotrypsin modulates the "spring-loaded" serpin-protease interaction., Lukacs CM, Rubin H, Christianson DW, Biochemistry. 1998 Mar 10;37(10):3297-304. PMID:9521649
Page seeded by OCA on Thu Mar 20 10:01:41 2008
