1xxb
From Proteopedia
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| - | [[Image:1xxb.jpg|left|200px]] | + | [[Image:1xxb.jpg|left|200px]] |
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| - | '''C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR/ L-ARGININE COMPLEX''' | + | {{Structure |
| + | |PDB= 1xxb |SIZE=350|CAPTION= <scene name='initialview01'>1xxb</scene>, resolution 2.6Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=ARG:ARGININE'>ARG</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= T7 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | ||
| + | }} | ||
| + | |||
| + | '''C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR/ L-ARGININE COMPLEX''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1XXB is a [ | + | 1XXB is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XXB OCA]. |
==Reference== | ==Reference== | ||
| - | Structure of the oligomerization and L-arginine binding domain of the arginine repressor of Escherichia coli., Van Duyne GD, Ghosh G, Maas WK, Sigler PB, J Mol Biol. 1996 Feb 23;256(2):377-91. PMID:[http:// | + | Structure of the oligomerization and L-arginine binding domain of the arginine repressor of Escherichia coli., Van Duyne GD, Ghosh G, Maas WK, Sigler PB, J Mol Biol. 1996 Feb 23;256(2):377-91. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8594204 8594204] |
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: complex (dna binding protein/peptide)]] | [[Category: complex (dna binding protein/peptide)]] | ||
| - | ''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 15:15:45 2008'' |
Revision as of 13:15, 20 March 2008
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| , resolution 2.6Å | |||||||
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| Ligands: | |||||||
| Gene: | T7 (Escherichia coli) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR/ L-ARGININE COMPLEX
Overview
The structure of the oligomerization and L-arginine binding domain of the Escherichia coli arginine repressor (ArgR) has been determined using X-ray diffraction methods at 2.2 A resolution with bound arginine and at 2.8 A in the unliganded form. The oligomeric core is a 3-fold rotationally symmetric hexamer formed from six identical subunits corresponding to the 77 C-terminal residues (80 to 156) of ArgR. Each subunit has an alpha/beta fold containing a four-stranded antiparallel beta-sheet and two antiparallel alpha-helices. The hexamer is formed from two trimers, each with tightly packed hydrophobic cores. In the absence of arginine, the trimers stack back-to-back through a dyad-symmetric, sparsely packed hydrophobic interface. Six molecules of arginine bind at the trimer-trimer interface, each making ten hydrogen bonds to the protein including a direct ion pair that crosslinks the two protein trimers. Solution experiments with wild-type ArgR and oligomerization domain indicate that the hexameric form is greatly stabilized upon arginine binding. The crystal structures and solution experiments together suggest possible mechanisms of how arginine activates ArgR to bind to its DNA targets and provides a stereochemical basis for interpreting the results of mutagenesis and biochemical experiments with ArgR.
About this Structure
1XXB is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Structure of the oligomerization and L-arginine binding domain of the arginine repressor of Escherichia coli., Van Duyne GD, Ghosh G, Maas WK, Sigler PB, J Mol Biol. 1996 Feb 23;256(2):377-91. PMID:8594204
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