1mb9
From Proteopedia
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| - | [[Image:1mb9.gif|left|200px]] | + | [[Image:1mb9.gif|left|200px]] |
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| - | '''BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP''' | + | {{Structure |
| + | |PDB= 1mb9 |SIZE=350|CAPTION= <scene name='initialview01'>1mb9</scene>, resolution 2.11Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=POP:PYROPHOSPHATE+2-'>POP</scene> and <scene name='pdbligand=AMP:ADENOSINE MONOPHOSPHATE'>AMP</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= 1901 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1901 Streptomyces clavuligerus]) | ||
| + | }} | ||
| + | |||
| + | '''BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1MB9 is a [ | + | 1MB9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Streptomyces_clavuligerus Streptomyces clavuligerus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MB9 OCA]. |
==Reference== | ==Reference== | ||
| - | The catalytic cycle of beta -lactam synthetase observed by x-ray crystallographic snapshots., Miller MT, Bachmann BO, Townsend CA, Rosenzweig AC, Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14752-7. Epub 2002 Oct 30. PMID:[http:// | + | The catalytic cycle of beta -lactam synthetase observed by x-ray crystallographic snapshots., Miller MT, Bachmann BO, Townsend CA, Rosenzweig AC, Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14752-7. Epub 2002 Oct 30. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12409610 12409610] |
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Streptomyces clavuligerus]] | [[Category: Streptomyces clavuligerus]] | ||
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[[Category: deoxyguanidinoproclavaminic acid]] | [[Category: deoxyguanidinoproclavaminic acid]] | ||
| - | ''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 12:41:22 2008'' |
Revision as of 10:41, 20 March 2008
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| , resolution 2.11Å | |||||||
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| Ligands: | , , and | ||||||
| Gene: | 1901 (Streptomyces clavuligerus) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP
Overview
The catalytic cycle of the ATP/Mg(2+)-dependent enzyme beta-lactam synthetase (beta-LS) from Streptomyces clavuligerus has been observed through a series of x-ray crystallographic snapshots. Chemistry is initiated by the ordered binding of ATP/Mg(2+) and N(2)-(carboxyethyl)-l-arginine (CEA) to the apoenzyme. The apo and ATP/Mg(2+) structures described here, along with the previously described CEA.alpha,beta-methyleneadenosine 5'-triphosphate (CEA.AMP-CPP)/Mg(2+) structure, illuminate changes in active site geometry that favor adenylation. In addition, an acyladenylate intermediate has been trapped. The substrate analog N(2)-(carboxymethyl)-l-arginine (CMA) was adenylated by ATP in the crystal and represents a close structural analog of the previously proposed CEA-adenylate intermediate. Finally, the structure of the ternary product complex deoxyguanidinoproclavaminic acid (DGPC).AMP/PP(i)/Mg(2+) has been determined. The CMA-AMP/PP(i)/Mg(2+) and DGPC.AMP/PP(i)/Mg(2+) structures reveal interactions in the active site that facilitate beta-lactam formation. All of the ATP-bound structures differ from the previously described CEA.AMP-CPP/Mg(2+) structure in that two Mg(2+) ions are found in the active sites. These Mg(2+) ions play critical roles in both the adenylation and beta-lactamization reactions.
About this Structure
1MB9 is a Single protein structure of sequence from Streptomyces clavuligerus. Full crystallographic information is available from OCA.
Reference
The catalytic cycle of beta -lactam synthetase observed by x-ray crystallographic snapshots., Miller MT, Bachmann BO, Townsend CA, Rosenzweig AC, Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14752-7. Epub 2002 Oct 30. PMID:12409610
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