2dln
From Proteopedia
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|PDB= 2dln |SIZE=350|CAPTION= <scene name='initialview01'>2dln</scene>, resolution 2.3Å | |PDB= 2dln |SIZE=350|CAPTION= <scene name='initialview01'>2dln</scene>, resolution 2.3Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ADP:ADENOSINE-5 | + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ADP:ADENOSINE-5'-DIPHOSPHATE'>ADP</scene> and <scene name='pdbligand=PHY:1(S)-AMINOETHYL-(2-CARBOXYPROPYL)PHOSPHORYL-PHOSPHINIC ACID'>PHY</scene> |
|ACTIVITY= [http://en.wikipedia.org/wiki/D-alanine--D-alanine_ligase D-alanine--D-alanine ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.4 6.3.2.4] | |ACTIVITY= [http://en.wikipedia.org/wiki/D-alanine--D-alanine_ligase D-alanine--D-alanine ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.4 6.3.2.4] | ||
|GENE= | |GENE= | ||
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[[Category: ligase(peptidoglycan synthesis)]] | [[Category: ligase(peptidoglycan synthesis)]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 23 14:56:47 2008'' |
Revision as of 12:56, 23 March 2008
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| , resolution 2.3Å | |||||||
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| Ligands: | , and | ||||||
| Activity: | D-alanine--D-alanine ligase, with EC number 6.3.2.4 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
VANCOMYCIN RESISTANCE: STRUCTURE OF D-ALANINE:D-ALANINE LIGASE AT 2.3 ANGSTROMS RESOLUTION
Overview
The molecular structure of the D-alanine:D-alanine ligase of the ddlB gene of Escherichia coli, co-crystallized with an S,R-methylphosphinate and adenosine triphosphate, was determined by x-ray diffraction to a resolution of 2.3 angstroms. A catalytic mechanism for the ligation of two D-alanine substrates is proposed in which a helix dipole and a hydrogen-bonded triad of tyrosine, serine, and glutamic acid assist binding and deprotonation steps. From sequence comparison, it is proposed that a different triad exists in a recently discovered D-alanine:D-lactate ligase (VanA) present in vancomycin-resistant enterococci. A molecular mechanism for the altered specificity of VanA is suggested.
About this Structure
2DLN is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Vancomycin resistance: structure of D-alanine:D-alanine ligase at 2.3 A resolution., Fan C, Moews PC, Walsh CT, Knox JR, Science. 1994 Oct 21;266(5184):439-43. PMID:7939684
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