1qi7
From Proteopedia
(New page: 200px<br /><applet load="1qi7" size="450" color="white" frame="true" align="right" spinBox="true" caption="1qi7, resolution 2.0Å" /> '''THE CRYSTAL STRUCTURE...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:1qi7.gif|left|200px]]<br /><applet load="1qi7" size=" | + | [[Image:1qi7.gif|left|200px]]<br /><applet load="1qi7" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1qi7, resolution 2.0Å" /> | caption="1qi7, resolution 2.0Å" /> | ||
'''THE CRYSTAL STRUCTURE AT 2.0 A OF SAPORIN SO6, A RIBOSOME INACTIVATING PROTEIN FROM SAPONARIA OFFICINALIS'''<br /> | '''THE CRYSTAL STRUCTURE AT 2.0 A OF SAPORIN SO6, A RIBOSOME INACTIVATING PROTEIN FROM SAPONARIA OFFICINALIS'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The 2.0 A resolution crystal structure of the ribosome inactivating | + | The 2.0 A resolution crystal structure of the ribosome inactivating protein saporin (isoform 6) from seeds of Saponaria officinalis is presented. The fold typical of other plant toxins is conserved, despite some differences in the loop regions. The loop between strands beta7 and beta8 in the C-terminal region which spans over the active site cleft appears shorter in saporin, suggesting an easier access to the substrate. Furthermore we investigated the molecular interaction between saporin and the yeast ribosome by differential chemical modifications. A contact surface inside the C-terminal region of saporin has been identified. Structural comparison between saporin and other ribosome inactivating proteins reveals that this region is conserved and represents a peculiar motif involved in ribosome recognition. |
==About this Structure== | ==About this Structure== | ||
| - | 1QI7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saponaria_officinalis Saponaria officinalis] with SO4 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/rRNA_N-glycosylase rRNA N-glycosylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.22 3.2.2.22] Full crystallographic information is available from [http:// | + | 1QI7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saponaria_officinalis Saponaria officinalis] with <scene name='pdbligand=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/rRNA_N-glycosylase rRNA N-glycosylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.22 3.2.2.22] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QI7 OCA]. |
==Reference== | ==Reference== | ||
| Line 23: | Line 23: | ||
[[Category: ribosome inactivating protein]] | [[Category: ribosome inactivating protein]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:39:50 2008'' |
Revision as of 12:39, 21 February 2008
|
THE CRYSTAL STRUCTURE AT 2.0 A OF SAPORIN SO6, A RIBOSOME INACTIVATING PROTEIN FROM SAPONARIA OFFICINALIS
Overview
The 2.0 A resolution crystal structure of the ribosome inactivating protein saporin (isoform 6) from seeds of Saponaria officinalis is presented. The fold typical of other plant toxins is conserved, despite some differences in the loop regions. The loop between strands beta7 and beta8 in the C-terminal region which spans over the active site cleft appears shorter in saporin, suggesting an easier access to the substrate. Furthermore we investigated the molecular interaction between saporin and the yeast ribosome by differential chemical modifications. A contact surface inside the C-terminal region of saporin has been identified. Structural comparison between saporin and other ribosome inactivating proteins reveals that this region is conserved and represents a peculiar motif involved in ribosome recognition.
About this Structure
1QI7 is a Single protein structure of sequence from Saponaria officinalis with as ligand. Active as rRNA N-glycosylase, with EC number 3.2.2.22 Full crystallographic information is available from OCA.
Reference
The crystal structure of saporin SO6 from Saponaria officinalis and its interaction with the ribosome., Savino C, Federici L, Ippoliti R, Lendaro E, Tsernoglou D, FEBS Lett. 2000 Mar 31;470(3):239-43. PMID:10745075
Page seeded by OCA on Thu Feb 21 14:39:50 2008
