2cdx
From Proteopedia
(New page: 200px<br /><applet load="2cdx" size="450" color="white" frame="true" align="right" spinBox="true" caption="2cdx" /> '''STRUCTURE OF COBRA CARDIOTOXIN CTXI AS DERIV...) |
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| - | [[Image:2cdx.jpg|left|200px]]<br /><applet load="2cdx" size=" | + | [[Image:2cdx.jpg|left|200px]]<br /><applet load="2cdx" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="2cdx" /> | caption="2cdx" /> | ||
'''STRUCTURE OF COBRA CARDIOTOXIN CTXI AS DERIVED FROM NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND DISTANCE GEOMETRY CALCULATIONS'''<br /> | '''STRUCTURE OF COBRA CARDIOTOXIN CTXI AS DERIVED FROM NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND DISTANCE GEOMETRY CALCULATIONS'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The structure of cardiotoxin CTX I from Naja naja atra has been | + | The structure of cardiotoxin CTX I from Naja naja atra has been investigated by NMR spectroscopy. Sequence specific resonance assignments have been obtained for all backbone protons as well as for most side-chain protons. Distance geometry calculations were carried out using a metric matrix DG program. A total of 715 NOE constraints, 27 phi angle constraints and a list of the hydrogen bond donors were used for the metric matrix DG calculations and refinement. The average pairwise r.m.s.d. of the resulting structures was 1.01 A for the backbone heavy atoms, and 1.69 A for all heavy atoms. The protein is rich in beta structure and consists of a large triple-stranded, antiparallel beta sheet as well as a short double-stranded, antiparallel beta sheet. Non-regular hydrogen bonding is found between side-chains of the carboxy-terminal end and the rest of the core region. The structure is discussed in terms of evolutionary aspects as well as recent investigations about the biological function and active site. |
==About this Structure== | ==About this Structure== | ||
| - | 2CDX is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Naja_atra Naja atra]. Full crystallographic information is available from [http:// | + | 2CDX is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Naja_atra Naja atra]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CDX OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Jahnke, W.]] | [[Category: Jahnke, W.]] | ||
[[Category: Kessler, H.]] | [[Category: Kessler, H.]] | ||
| - | [[Category: Mierke, D | + | [[Category: Mierke, D F.]] |
[[Category: cardiotoxin]] | [[Category: cardiotoxin]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:47:38 2008'' |
Revision as of 14:47, 21 February 2008
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STRUCTURE OF COBRA CARDIOTOXIN CTXI AS DERIVED FROM NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND DISTANCE GEOMETRY CALCULATIONS
Overview
The structure of cardiotoxin CTX I from Naja naja atra has been investigated by NMR spectroscopy. Sequence specific resonance assignments have been obtained for all backbone protons as well as for most side-chain protons. Distance geometry calculations were carried out using a metric matrix DG program. A total of 715 NOE constraints, 27 phi angle constraints and a list of the hydrogen bond donors were used for the metric matrix DG calculations and refinement. The average pairwise r.m.s.d. of the resulting structures was 1.01 A for the backbone heavy atoms, and 1.69 A for all heavy atoms. The protein is rich in beta structure and consists of a large triple-stranded, antiparallel beta sheet as well as a short double-stranded, antiparallel beta sheet. Non-regular hydrogen bonding is found between side-chains of the carboxy-terminal end and the rest of the core region. The structure is discussed in terms of evolutionary aspects as well as recent investigations about the biological function and active site.
About this Structure
2CDX is a Single protein structure of sequence from Naja atra. Full crystallographic information is available from OCA.
Reference
Structure of cobra cardiotoxin CTX I as derived from nuclear magnetic resonance spectroscopy and distance geometry calculations., Jahnke W, Mierke DF, Beress L, Kessler H, J Mol Biol. 1994 Jul 29;240(5):445-58. PMID:8046750
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