1el4

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[[Image:1el4.gif|left|200px]]<br /><applet load="1el4" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:1el4.gif|left|200px]]
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caption="1el4, resolution 1.73&Aring;" />
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'''STRUCTURE OF THE CALCIUM-REGULATED PHOTOPROTEIN OBELIN DETERMINED BY SULFUR SAS'''<br />
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{{Structure
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|PDB= 1el4 |SIZE=350|CAPTION= <scene name='initialview01'>1el4</scene>, resolution 1.73&Aring;
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|SITE=
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|LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene> and <scene name='pdbligand=CTZ:C2-HYDROXY-COELENTERAZINE'>CTZ</scene>
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|ACTIVITY=
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|GENE=
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}}
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'''STRUCTURE OF THE CALCIUM-REGULATED PHOTOPROTEIN OBELIN DETERMINED BY SULFUR SAS'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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1EL4 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Obelia_longissima Obelia longissima] with <scene name='pdbligand=CL:'>CL</scene> and <scene name='pdbligand=CTZ:'>CTZ</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EL4 OCA].
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1EL4 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Obelia_longissima Obelia longissima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EL4 OCA].
==Reference==
==Reference==
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Structure of the Ca2+-regulated photoprotein obelin at 1.7 A resolution determined directly from its sulfur substructure., Liu ZJ, Vysotski ES, Chen CJ, Rose JP, Lee J, Wang BC, Protein Sci. 2000 Nov;9(11):2085-93. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11152120 11152120]
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Structure of the Ca2+-regulated photoprotein obelin at 1.7 A resolution determined directly from its sulfur substructure., Liu ZJ, Vysotski ES, Chen CJ, Rose JP, Lee J, Wang BC, Protein Sci. 2000 Nov;9(11):2085-93. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11152120 11152120]
[[Category: Obelia longissima]]
[[Category: Obelia longissima]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: sulfur anomalous scattering]]
[[Category: sulfur anomalous scattering]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:28:53 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:57:04 2008''

Revision as of 08:57, 20 March 2008

Image:1el4.gif


PDB ID 1el4

Drag the structure with the mouse to rotate
, resolution 1.73Å
Ligands: and
Coordinates: save as pdb, mmCIF, xml



STRUCTURE OF THE CALCIUM-REGULATED PHOTOPROTEIN OBELIN DETERMINED BY SULFUR SAS


Overview

The crystal structure of the photoprotein obelin (22.2 kDa) from Obelia longissima has been determined and refined to 1.7 A resolution. Contrary to the prediction of a peroxide, the noncovalently bound substrate, coelenterazine, has only a single oxygen atom bound at the C2-position. The protein-coelenterazine 2-oxy complex observed in the crystals is photo-active because, in the presence of calcium ion, bioluminescence emission within the crystal is observed. This structure represents only the second de novo protein structure determined using the anomalous scattering signal of the sulfur substructure in the crystal. The method used here is theoretically different from that used for crambin in 1981 (4.72 kDa) and represents a significant advancement in protein crystal structure determination.

About this Structure

1EL4 is a Single protein structure of sequence from Obelia longissima. Full crystallographic information is available from OCA.

Reference

Structure of the Ca2+-regulated photoprotein obelin at 1.7 A resolution determined directly from its sulfur substructure., Liu ZJ, Vysotski ES, Chen CJ, Rose JP, Lee J, Wang BC, Protein Sci. 2000 Nov;9(11):2085-93. PMID:11152120

Page seeded by OCA on Thu Mar 20 10:57:04 2008

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