1gyk
From Proteopedia
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==Overview== | ==Overview== | ||
| - | Two monoclinic (P2(1)) crystal forms of human serum amyloid P component | + | Two monoclinic (P2(1)) crystal forms of human serum amyloid P component (SAP) in complex with the 4,6-pyruvate acetal of beta-D-galactose (MObetaDG) were prepared. Structure analysis by molecular replacement and refinement at 2.2A resolution revealed that crystal form 1 (a=95.76A, b=70.53A, c=103.41A, beta=96.80 degrees) contained a pentamer in the asymmetric unit with a structure very similar to that of the published search model. The mode of ligand co-ordination was also similar except that four of the five subunits showed bound ligand with an additional H-bond between O1 of the galactose and the side-chain of Lys79. One sub-unit showed no bound ligand and a vacant calcium site close to a crystal contact. The 2.6A resolution structure of crystal form 2 (a=118.60A, b=109.10A, c=120.80A and beta=95.16 degrees ) showed ten sub-units in the asymmetric unit, all with two bound calcium ions and ligand. The most extensive protein-protein interactions between pentamers describe an AB face-to-face interaction involving 15 ion pairs that sandwiches five molecules of bound MObetaDG at the interface. |
==Disease== | ==Disease== | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Pepys, M | + | [[Category: Pepys, M B.]] |
[[Category: Thompson, D.]] | [[Category: Thompson, D.]] | ||
[[Category: Tickle, I.]] | [[Category: Tickle, I.]] | ||
| - | [[Category: Wood, S | + | [[Category: Wood, S P.]] |
[[Category: CA]] | [[Category: CA]] | ||
[[Category: CDG]] | [[Category: CDG]] | ||
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[[Category: polymorphism]] | [[Category: polymorphism]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:55:23 2008'' |
Revision as of 10:55, 21 February 2008
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SERUM AMYLOID P COMPONENT CO-CRYSTALLISED WITH MOBDG AT NEUTRAL PH
Contents |
Overview
Two monoclinic (P2(1)) crystal forms of human serum amyloid P component (SAP) in complex with the 4,6-pyruvate acetal of beta-D-galactose (MObetaDG) were prepared. Structure analysis by molecular replacement and refinement at 2.2A resolution revealed that crystal form 1 (a=95.76A, b=70.53A, c=103.41A, beta=96.80 degrees) contained a pentamer in the asymmetric unit with a structure very similar to that of the published search model. The mode of ligand co-ordination was also similar except that four of the five subunits showed bound ligand with an additional H-bond between O1 of the galactose and the side-chain of Lys79. One sub-unit showed no bound ligand and a vacant calcium site close to a crystal contact. The 2.6A resolution structure of crystal form 2 (a=118.60A, b=109.10A, c=120.80A and beta=95.16 degrees ) showed ten sub-units in the asymmetric unit, all with two bound calcium ions and ligand. The most extensive protein-protein interactions between pentamers describe an AB face-to-face interaction involving 15 ion pairs that sandwiches five molecules of bound MObetaDG at the interface.
Disease
Known disease associated with this structure: Amyloidosis, secondary, susceptibility to OMIM:[104770]
About this Structure
1GYK is a Single protein structure of sequence from Homo sapiens with and as ligands. Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
The structures of crystalline complexes of human serum amyloid P component with its carbohydrate ligand, the cyclic pyruvate acetal of galactose., Thompson D, Pepys MB, Tickle I, Wood S, J Mol Biol. 2002 Jul 26;320(5):1081-6. PMID:12126626
Page seeded by OCA on Thu Feb 21 12:55:23 2008
Categories: Homo sapiens | Single protein | Pepys, M B. | Thompson, D. | Tickle, I. | Wood, S P. | CA | CDG | Amyloid lectin | Glycoprotein | Pentraxin | Plasma | Polymorphism
