1eqk
From Proteopedia
(New page: 200px<br /><applet load="1eqk" size="450" color="white" frame="true" align="right" spinBox="true" caption="1eqk" /> '''SOLUTION STRUCTURE OF ORYZACYSTATIN-I, A CYS...) |
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| - | [[Image:1eqk.gif|left|200px]]<br /><applet load="1eqk" size=" | + | [[Image:1eqk.gif|left|200px]]<br /><applet load="1eqk" size="350" color="white" frame="true" align="right" spinBox="true" |
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'''SOLUTION STRUCTURE OF ORYZACYSTATIN-I, A CYSTEINE PROTEINASE INHIBITOR OF THE RICE, ORYZA SATIVA L. JAPONICA'''<br /> | '''SOLUTION STRUCTURE OF ORYZACYSTATIN-I, A CYSTEINE PROTEINASE INHIBITOR OF THE RICE, ORYZA SATIVA L. JAPONICA'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The three-dimensional structure of oryzacystatin-I, a cysteine proteinase | + | The three-dimensional structure of oryzacystatin-I, a cysteine proteinase inhibitor of the rice, Oryza sativa L. japonica, has been determined in solution at pH 6.8 and 25 degrees C by (1)H and (15)N NMR spectroscopy. The main body (Glu13-Asp97) of oryzacystatin-I is well-defined and consists of an alpha-helix and a five-stranded antiparallel beta-sheet, while the N- and C-terminal regions (Ser2-Val12 and Ala98-Ala102) are less defined. The helix-sheet architechture of oryzacystatin-I is stabilized by a hydrophobic cluster formed between the alpha-helix and the beta-sheet and is considerably similar to that of monellin, a sweet-tasting protein from an African berry, as well as those of the animal cystatins studied, e.g., chicken egg white cystatin and human stefins A and B (also referred to as human cystatins A and B). Detailed structural comparison indicates that oryzacystatin-I is more similar to chicken cystatin, which belongs to the type-2 animal cystatins, than to human stefins A and B, which belong to the type-1 animal cystatins, despite different loop length. |
==About this Structure== | ==About this Structure== | ||
| - | 1EQK is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Oryza_sativa_japonica_group Oryza sativa japonica group]. Full crystallographic information is available from [http:// | + | 1EQK is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Oryza_sativa_japonica_group Oryza sativa japonica group]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EQK OCA]. |
==Reference== | ==Reference== | ||
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[[Category: phytocystatin family]] | [[Category: phytocystatin family]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:30:33 2008'' |
Revision as of 10:30, 21 February 2008
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SOLUTION STRUCTURE OF ORYZACYSTATIN-I, A CYSTEINE PROTEINASE INHIBITOR OF THE RICE, ORYZA SATIVA L. JAPONICA
Overview
The three-dimensional structure of oryzacystatin-I, a cysteine proteinase inhibitor of the rice, Oryza sativa L. japonica, has been determined in solution at pH 6.8 and 25 degrees C by (1)H and (15)N NMR spectroscopy. The main body (Glu13-Asp97) of oryzacystatin-I is well-defined and consists of an alpha-helix and a five-stranded antiparallel beta-sheet, while the N- and C-terminal regions (Ser2-Val12 and Ala98-Ala102) are less defined. The helix-sheet architechture of oryzacystatin-I is stabilized by a hydrophobic cluster formed between the alpha-helix and the beta-sheet and is considerably similar to that of monellin, a sweet-tasting protein from an African berry, as well as those of the animal cystatins studied, e.g., chicken egg white cystatin and human stefins A and B (also referred to as human cystatins A and B). Detailed structural comparison indicates that oryzacystatin-I is more similar to chicken cystatin, which belongs to the type-2 animal cystatins, than to human stefins A and B, which belong to the type-1 animal cystatins, despite different loop length.
About this Structure
1EQK is a Single protein structure of sequence from Oryza sativa japonica group. Full crystallographic information is available from OCA.
Reference
Three-dimensional solution structure of oryzacystatin-I, a cysteine proteinase inhibitor of the rice, Oryza sativa L. japonica., Nagata K, Kudo N, Abe K, Arai S, Tanokura M, Biochemistry. 2000 Dec 5;39(48):14753-60. PMID:11101290
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