1ndl
From Proteopedia
(New page: 200px<br /><applet load="1ndl" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ndl, resolution 2.4Å" /> '''THE AWD NUCLEOTIDE DI...) |
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| - | [[Image:1ndl.jpg|left|200px]]<br /><applet load="1ndl" size=" | + | [[Image:1ndl.jpg|left|200px]]<br /><applet load="1ndl" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1ndl, resolution 2.4Å" /> | caption="1ndl, resolution 2.4Å" /> | ||
'''THE AWD NUCLEOTIDE DIPHOSPHATE KINASE FROM DROSOPHILA'''<br /> | '''THE AWD NUCLEOTIDE DIPHOSPHATE KINASE FROM DROSOPHILA'''<br /> | ||
==Overview== | ==Overview== | ||
| - | BACKGROUND: Nucleotide diphosphate kinase (NDP kinase) is a phosphate | + | BACKGROUND: Nucleotide diphosphate kinase (NDP kinase) is a phosphate transfer enzyme involved in cell regulation and in animal development. Drosophila NDP kinase is the product of the abnormal wing disc (awd) developmental gene, a point mutation in which can produce the killer of prune (K-pn) conditional lethal phenotype. The highly homologous mammalian genes control metastasis and a human NDP kinase acts as a transcription factor. RESULTS: The X-ray structure of the Awd protein prepared from Drosophila was solved at 2.4 A resolution by molecular replacement from the homologous Dictyostelium protein. Both are hexamers, and both have the same fold and the same active site. Subunit contacts differ as a result of sequence changes in the carboxy-terminal segment and in the loop that is the site of the K-pn mutation. CONCLUSIONS: Regulatory properties of animal NDP kinases depend on interactions with other macromolecules, such as DNA and the product of the Drosophila prune gene. The Awd structure suggests an allosteric mechanism of action of NDP kinase where DNA is the effector and the protein undergoes a major conformational change, possibly dissociating to dimers. |
==About this Structure== | ==About this Structure== | ||
| - | 1NDL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Active as [http://en.wikipedia.org/wiki/Nucleoside-diphosphate_kinase Nucleoside-diphosphate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.6 2.7.4.6] Full crystallographic information is available from [http:// | + | 1NDL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Active as [http://en.wikipedia.org/wiki/Nucleoside-diphosphate_kinase Nucleoside-diphosphate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.6 2.7.4.6] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NDL OCA]. |
==Reference== | ==Reference== | ||
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[[Category: phosphotransferase]] | [[Category: phosphotransferase]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:05:01 2008'' |
Revision as of 12:05, 21 February 2008
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THE AWD NUCLEOTIDE DIPHOSPHATE KINASE FROM DROSOPHILA
Overview
BACKGROUND: Nucleotide diphosphate kinase (NDP kinase) is a phosphate transfer enzyme involved in cell regulation and in animal development. Drosophila NDP kinase is the product of the abnormal wing disc (awd) developmental gene, a point mutation in which can produce the killer of prune (K-pn) conditional lethal phenotype. The highly homologous mammalian genes control metastasis and a human NDP kinase acts as a transcription factor. RESULTS: The X-ray structure of the Awd protein prepared from Drosophila was solved at 2.4 A resolution by molecular replacement from the homologous Dictyostelium protein. Both are hexamers, and both have the same fold and the same active site. Subunit contacts differ as a result of sequence changes in the carboxy-terminal segment and in the loop that is the site of the K-pn mutation. CONCLUSIONS: Regulatory properties of animal NDP kinases depend on interactions with other macromolecules, such as DNA and the product of the Drosophila prune gene. The Awd structure suggests an allosteric mechanism of action of NDP kinase where DNA is the effector and the protein undergoes a major conformational change, possibly dissociating to dimers.
About this Structure
1NDL is a Single protein structure of sequence from Drosophila melanogaster. Active as Nucleoside-diphosphate kinase, with EC number 2.7.4.6 Full crystallographic information is available from OCA.
Reference
Crystal structure of the Awd nucleotide diphosphate kinase from Drosophila., Chiadmi M, Morera S, Lascu I, Dumas C, Le Bras G, Veron M, Janin J, Structure. 1993 Dec 15;1(4):283-93. PMID:8081741
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