|
|
| Line 1: |
Line 1: |
| [[Image:1ul3.jpg|left|200px]] | | {{Seed}} |
| | [[Image:1ul3.png|left|200px]] |
|
| |
|
| <!-- | | <!-- |
| Line 9: |
Line 10: |
| {{STRUCTURE_1ul3| PDB=1ul3 | SCENE= }} | | {{STRUCTURE_1ul3| PDB=1ul3 | SCENE= }} |
|
| |
|
| '''Crystal Structure of PII from Synechocystis sp. PCC 6803'''
| | ===Crystal Structure of PII from Synechocystis sp. PCC 6803=== |
|
| |
|
|
| |
|
| ==Overview==
| | <!-- |
| The PII proteins from the cyanobacteria Synechococcus sp. PCC 7942 and Synechocystis sp. PCC 6803 have been crystallized and high-resolution structures have been obtained using X-ray crystallography. The core of these new structures is similar to that of the PII proteins from Escherichia coli, although the structures of the T- and C-loops differ. The T-loop of the Synechococcus protein is ordered, but appears to be stabilized by crystal contacts. The same loop in the Synechocystis protein is disordered. The C-terminus of the Synechocystis protein is stabilized by hydrogen bonding to the same region of a crystallographically related molecule. The same terminus in the Synechococcus protein is stabilized by coordination with a metal ion. These observations are consistent with the idea that both the T-loop and the C-terminus of PII proteins are flexible in solution and that this flexibility may be important for receptor recognition. Sequence comparisons are used to identify regions of the sequence unique to the cyanobacteria.
| | The line below this paragraph, {{ABSTRACT_PUBMED_14646076}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 14646076 is the PubMed ID number. |
| | --> |
| | {{ABSTRACT_PUBMED_14646076}} |
|
| |
|
| ==About this Structure== | | ==About this Structure== |
| Line 33: |
Line 37: |
| [[Category: Cyanobacteria]] | | [[Category: Cyanobacteria]] |
| [[Category: Nitrogen regulation]] | | [[Category: Nitrogen regulation]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:22:27 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 02:55:06 2008'' |
