1lsg
From Proteopedia
(New page: 200px<br /><applet load="1lsg" size="450" color="white" frame="true" align="right" spinBox="true" caption="1lsg, resolution 2.4Å" /> '''THREE-DIMENSIONAL STR...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:1lsg.jpg|left|200px]]<br /><applet load="1lsg" size=" | + | [[Image:1lsg.jpg|left|200px]]<br /><applet load="1lsg" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1lsg, resolution 2.4Å" /> | caption="1lsg, resolution 2.4Å" /> | ||
'''THREE-DIMENSIONAL STRUCTURE OF THE PLATELET INTEGRIN RECOGNITION SEGMENT OF THE FIBRINOGEN GAMMA CHAIN OBTAINED BY CARRIER PROTEIN-DRIVEN CRYSTALLIZATION'''<br /> | '''THREE-DIMENSIONAL STRUCTURE OF THE PLATELET INTEGRIN RECOGNITION SEGMENT OF THE FIBRINOGEN GAMMA CHAIN OBTAINED BY CARRIER PROTEIN-DRIVEN CRYSTALLIZATION'''<br /> | ||
==Overview== | ==Overview== | ||
| - | We have developed a method for crystallizing small functional protein | + | We have developed a method for crystallizing small functional protein segments so that their three-dimensional structure can be determined by x-ray diffraction analysis. This method consists of linking a small protein segment of unknown tertiary structure to either the amino or carboxyl terminus of a larger carrier protein of known tertiary structure. Crystallization of the small segment is then driven by crystallization of the carrier protein. Using this approach, we have obtained crystals of the human fibrinogen gamma-chain carboxyl-terminal segment linked to the carboxyl terminus of chicken egg white lysozyme. The three-dimensional structure of the carboxyl-terminal segment of the fibrinogen gamma chain was determined by x-ray diffraction analysis at a resolution of 2.4 A. This segment encompasses the recognition site for the integrin alpha IIb beta 3 receptor on activated platelets and for the clumping receptor on pathogenic staphylococci and also bears donor and acceptor sites for factor XIIIa-catalyzed crosslinking of fibrin. Therefore, the structural information derived from our analysis will provide a rational basis for the design of inhibitors of these important functions of fibrinogen. Moreover, carrier protein-driven crystallization will facilitate the determination of the three-dimensional structure of functional segments of other proteins that are, like fibrinogen, difficult to crystallize in toto. |
==About this Structure== | ==About this Structure== | ||
| - | 1LSG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus]. Full crystallographic information is available from [http:// | + | 1LSG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LSG OCA]. |
==Reference== | ==Reference== | ||
| Line 13: | Line 13: | ||
[[Category: Gallus gallus]] | [[Category: Gallus gallus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Anderson, W | + | [[Category: Anderson, W F.]] |
[[Category: Patel, H.]] | [[Category: Patel, H.]] | ||
[[Category: fibrinogen]] | [[Category: fibrinogen]] | ||
[[Category: lysozyme]] | [[Category: lysozyme]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:47:57 2008'' |
Revision as of 11:48, 21 February 2008
|
THREE-DIMENSIONAL STRUCTURE OF THE PLATELET INTEGRIN RECOGNITION SEGMENT OF THE FIBRINOGEN GAMMA CHAIN OBTAINED BY CARRIER PROTEIN-DRIVEN CRYSTALLIZATION
Overview
We have developed a method for crystallizing small functional protein segments so that their three-dimensional structure can be determined by x-ray diffraction analysis. This method consists of linking a small protein segment of unknown tertiary structure to either the amino or carboxyl terminus of a larger carrier protein of known tertiary structure. Crystallization of the small segment is then driven by crystallization of the carrier protein. Using this approach, we have obtained crystals of the human fibrinogen gamma-chain carboxyl-terminal segment linked to the carboxyl terminus of chicken egg white lysozyme. The three-dimensional structure of the carboxyl-terminal segment of the fibrinogen gamma chain was determined by x-ray diffraction analysis at a resolution of 2.4 A. This segment encompasses the recognition site for the integrin alpha IIb beta 3 receptor on activated platelets and for the clumping receptor on pathogenic staphylococci and also bears donor and acceptor sites for factor XIIIa-catalyzed crosslinking of fibrin. Therefore, the structural information derived from our analysis will provide a rational basis for the design of inhibitors of these important functions of fibrinogen. Moreover, carrier protein-driven crystallization will facilitate the determination of the three-dimensional structure of functional segments of other proteins that are, like fibrinogen, difficult to crystallize in toto.
About this Structure
1LSG is a Single protein structure of sequence from Gallus gallus. Full crystallographic information is available from OCA.
Reference
Three-dimensional structure of the platelet integrin recognition segment of the fibrinogen gamma chain obtained by carrier protein-driven crystallization., Donahue JP, Patel H, Anderson WF, Hawiger J, Proc Natl Acad Sci U S A. 1994 Dec 6;91(25):12178-82. PMID:7527555
Page seeded by OCA on Thu Feb 21 13:47:57 2008
