1srd
From Proteopedia
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| - | [[Image:1srd.jpg|left|200px]] | + | [[Image:1srd.jpg|left|200px]] |
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| - | '''THREE-DIMENSIONAL STRUCTURE OF CU,ZN-SUPEROXIDE DISMUTASE FROM SPINACH AT 2.0 ANGSTROMS RESOLUTION''' | + | {{Structure |
| + | |PDB= 1srd |SIZE=350|CAPTION= <scene name='initialview01'>1srd</scene>, resolution 2.0Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene> and <scene name='pdbligand=ZN:ZINC ION'>ZN</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Superoxide_dismutase Superoxide dismutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.15.1.1 1.15.1.1] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''THREE-DIMENSIONAL STRUCTURE OF CU,ZN-SUPEROXIDE DISMUTASE FROM SPINACH AT 2.0 ANGSTROMS RESOLUTION''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1SRD is a [ | + | 1SRD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SRD OCA]. |
==Reference== | ==Reference== | ||
| - | Three-dimensional structure of Cu,Zn-superoxide dismutase from spinach at 2.0 A resolution., Kitagawa Y, Tanaka N, Hata Y, Kusunoki M, Lee GP, Katsube Y, Asada K, Aibara S, Morita Y, J Biochem. 1991 Mar;109(3):477-85. PMID:[http:// | + | Three-dimensional structure of Cu,Zn-superoxide dismutase from spinach at 2.0 A resolution., Kitagawa Y, Tanaka N, Hata Y, Kusunoki M, Lee GP, Katsube Y, Asada K, Aibara S, Morita Y, J Biochem. 1991 Mar;109(3):477-85. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1880134 1880134] |
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Spinacia oleracea]] | [[Category: Spinacia oleracea]] | ||
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[[Category: oxidoreductase(superoxide acceptor)]] | [[Category: oxidoreductase(superoxide acceptor)]] | ||
| - | ''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 14:08:41 2008'' |
Revision as of 12:08, 20 March 2008
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| , resolution 2.0Å | |||||||
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| Ligands: | and | ||||||
| Activity: | Superoxide dismutase, with EC number 1.15.1.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
THREE-DIMENSIONAL STRUCTURE OF CU,ZN-SUPEROXIDE DISMUTASE FROM SPINACH AT 2.0 ANGSTROMS RESOLUTION
Overview
The three-dimensional structure of Cu,Zn-superoxide dismutase from spinach leaves has been determined by X-ray crystal structure analysis. The atomic coordinates were refined at 2.0 A resolution using the Hendrickson and Konnert program for stereochemically restrained refinement against structure factors, which allowed the use of non-crystallographic symmetry. The crystallographic residual error for the refined model was 24.9%, with a root mean square deviation of 0.03 A from the ideal bond length and an average atomic temperature factor of 9.6 A. A dimeric molecule of the enzyme is comprised of two identical subunits related by a non-crystallographic 2-fold axis. Each subunit of 154 amino acid residues is composed primarily of eight anti-parallel beta-strands that form a flattened cylinder, plus three external loops. The main-chain hydrogen bonds primarily link the beta-strands. The overall structure of this enzyme is quite similar to that of the bovine dismutase except for some parts. The single disulfide bridge (Cys57-Cys146) and the salt bridge (Arg79-Asp101) may stabilize the loop regions of the structure. The Cu2+ and Zn2+ ions in the active site lie 6.1 A apart at the bottom of the long channel. The Cu2+ ligands (ND1 of His-46, and NE2 of His-48, -63, and -120) show an uneven tetrahedral distortion from a square plane. The Zn2+ ligands (ND1 of His-63, -71, and -80 and OD1 of Asp-83) show an almost tetrahedral geometry. The imidazole ring of His-63 forms a bridge between the Cu2+ and Zn2+ ions.(ABSTRACT TRUNCATED AT 250 WORDS)
About this Structure
1SRD is a Single protein structure of sequence from Spinacia oleracea. Full crystallographic information is available from OCA.
Reference
Three-dimensional structure of Cu,Zn-superoxide dismutase from spinach at 2.0 A resolution., Kitagawa Y, Tanaka N, Hata Y, Kusunoki M, Lee GP, Katsube Y, Asada K, Aibara S, Morita Y, J Biochem. 1991 Mar;109(3):477-85. PMID:1880134
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