1t8y
From Proteopedia
(New page: 200px<br /><applet load="1t8y" size="450" color="white" frame="true" align="right" spinBox="true" caption="1t8y, resolution 3.00Å" /> '''Crystal Structure of...) |
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| - | [[Image:1t8y.jpg|left|200px]]<br /><applet load="1t8y" size=" | + | [[Image:1t8y.jpg|left|200px]]<br /><applet load="1t8y" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1t8y, resolution 3.00Å" /> | caption="1t8y, resolution 3.00Å" /> | ||
'''Crystal Structure of E.coli AMP Nucleosidase complexed with phosphate'''<br /> | '''Crystal Structure of E.coli AMP Nucleosidase complexed with phosphate'''<br /> | ||
==Overview== | ==Overview== | ||
| - | AMP nucleosidase (AMN) catalyzes the hydrolysis of AMP to form adenine and | + | AMP nucleosidase (AMN) catalyzes the hydrolysis of AMP to form adenine and ribose 5-phosphate. The enzyme is found only in prokaryotes, where it plays a role in purine nucleoside salvage and intracellular AMP level regulation. Enzyme activity is stimulated by ATP and suppressed by phosphate. The structure of unliganded AMN was determined at 2.7 A resolution, and structures of the complexes with either formycin 5'-monophosphate or inorganic phosphate were determined at 2.6 A and 3.0 A resolution, respectively. AMN is a biological homohexamer, and each monomer is composed of two domains: a catalytic domain and a putative regulatory domain. The overall topology of the catalytic domain and some features of the substrate binding site resemble those of the nucleoside phosphorylases, demonstrating that AMN is a new member of the family. The structure of the regulatory domain consists of a long helix and a four-stranded sheet and has a novel topology. |
==About this Structure== | ==About this Structure== | ||
| - | 1T8Y is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with PO4 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/AMP_nucleosidase AMP nucleosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.4 3.2.2.4] Full crystallographic information is available from [http:// | + | 1T8Y is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with <scene name='pdbligand=PO4:'>PO4</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/AMP_nucleosidase AMP nucleosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.4 3.2.2.4] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T8Y OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Cottet, S | + | [[Category: Cottet, S E.]] |
| - | [[Category: Ealick, S | + | [[Category: Ealick, S E.]] |
[[Category: Zhang, Y.]] | [[Category: Zhang, Y.]] | ||
[[Category: PO4]] | [[Category: PO4]] | ||
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[[Category: alpha-beta-alpha sandwich]] | [[Category: alpha-beta-alpha sandwich]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:11:11 2008'' |
Revision as of 13:11, 21 February 2008
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Crystal Structure of E.coli AMP Nucleosidase complexed with phosphate
Overview
AMP nucleosidase (AMN) catalyzes the hydrolysis of AMP to form adenine and ribose 5-phosphate. The enzyme is found only in prokaryotes, where it plays a role in purine nucleoside salvage and intracellular AMP level regulation. Enzyme activity is stimulated by ATP and suppressed by phosphate. The structure of unliganded AMN was determined at 2.7 A resolution, and structures of the complexes with either formycin 5'-monophosphate or inorganic phosphate were determined at 2.6 A and 3.0 A resolution, respectively. AMN is a biological homohexamer, and each monomer is composed of two domains: a catalytic domain and a putative regulatory domain. The overall topology of the catalytic domain and some features of the substrate binding site resemble those of the nucleoside phosphorylases, demonstrating that AMN is a new member of the family. The structure of the regulatory domain consists of a long helix and a four-stranded sheet and has a novel topology.
About this Structure
1T8Y is a Single protein structure of sequence from Escherichia coli with as ligand. Active as AMP nucleosidase, with EC number 3.2.2.4 Full crystallographic information is available from OCA.
Reference
Structure of Escherichia coli AMP nucleosidase reveals similarity to nucleoside phosphorylases., Zhang Y, Cottet SE, Ealick SE, Structure. 2004 Aug;12(8):1383-94. PMID:15296732
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