1jdx: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:1jdx.jpg|left|200px]] | [[Image:1jdx.jpg|left|200px]] | ||
'''CRYSTAL STRUCTURE OF HUMAN L-ARGININE:GLYCINE AMIDINOTRANSFERASE IN COMPLEX WITH L-NORVALINE''' | {{Structure | ||
|PDB= 1jdx |SIZE=350|CAPTION= <scene name='initialview01'>1jdx</scene>, resolution 2.4Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=NVA:NORVALINE'>NVA</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Glycine_amidinotransferase Glycine amidinotransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.4.1 2.1.4.1] | |||
|GENE= AT38H ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |||
}} | |||
'''CRYSTAL STRUCTURE OF HUMAN L-ARGININE:GLYCINE AMIDINOTRANSFERASE IN COMPLEX WITH L-NORVALINE''' | |||
==Overview== | ==Overview== | ||
| Line 10: | Line 19: | ||
==About this Structure== | ==About this Structure== | ||
1JDX is a [ | 1JDX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JDX OCA]. | ||
==Reference== | ==Reference== | ||
The ligand-induced structural changes of human L-Arginine:Glycine amidinotransferase. A mutational and crystallographic study., Fritsche E, Humm A, Huber R, J Biol Chem. 1999 Jan 29;274(5):3026-32. PMID:[http:// | The ligand-induced structural changes of human L-Arginine:Glycine amidinotransferase. A mutational and crystallographic study., Fritsche E, Humm A, Huber R, J Biol Chem. 1999 Jan 29;274(5):3026-32. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9915841 9915841] | ||
[[Category: Glycine amidinotransferase]] | [[Category: Glycine amidinotransferase]] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| Line 27: | Line 36: | ||
[[Category: reaction mechanism]] | [[Category: reaction mechanism]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:02:10 2008'' | ||
Revision as of 13:02, 20 March 2008
| |||||||
| , resolution 2.4Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Gene: | AT38H (Homo sapiens) | ||||||
| Activity: | Glycine amidinotransferase, with EC number 2.1.4.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF HUMAN L-ARGININE:GLYCINE AMIDINOTRANSFERASE IN COMPLEX WITH L-NORVALINE
OverviewOverview
Human L-arginine:glycine amidinotransferase (AT) shows large structural changes of the 300-flap and of helix H9 upon binding of L-arginine and L-ornithine, described as a closed and an open conformation (Humm, A., Fritsche, E., Steinbacher, S., and Huber, R. (1997) EMBO J. 16, 3373-3385). To elucidate the structural basis of these induced-fit movements, the x-ray structures of AT in complex with the amidino acceptor glycine and its analogs gamma-aminobutyric acid and delta-aminovaleric acid, as well as in complex with the amidino donor analogs L-alanine, L-alpha-aminobutyric acid, and L-norvaline, have been solved at 2.6-, 2.5-, 2.37-, 2.3-, 2.5-, and 2.4-A resolutions, respectively. The latter three compounds were found to stabilize the open conformer. The glycine analogs bind in a distinct manner and do not induce the transition to the open state. The complex with glycine revealed a third binding mode, reflecting the rather broad substrate specificity of AT. These findings identified a role for the alpha-amino group of the ligand in stabilizing the open conformer. The kinetic, structural, and thermodynamic properties of the mutants ATDeltaM302 and ATDelta11 (lacks 11 residues of H9) confirmed the key role of Asn300 and suggest that in mammalian amidinotransferases, the role of helix H9 is in accelerating amidino transfer by an induced-fit mechanism. Helix H9 does not add to the stability of the protein.
DiseaseDisease
Known diseases associated with this structure: AGAT deficiency OMIM:[602360]
About this StructureAbout this Structure
1JDX is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
The ligand-induced structural changes of human L-Arginine:Glycine amidinotransferase. A mutational and crystallographic study., Fritsche E, Humm A, Huber R, J Biol Chem. 1999 Jan 29;274(5):3026-32. PMID:9915841
Page seeded by OCA on Thu Mar 20 12:02:10 2008