1cs1
From Proteopedia
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|PDB= 1cs1 |SIZE=350|CAPTION= <scene name='initialview01'>1cs1</scene>, resolution 1.5Å | |PDB= 1cs1 |SIZE=350|CAPTION= <scene name='initialview01'>1cs1</scene>, resolution 1.5Å | ||
|SITE= <scene name='pdbsite=PLA:Cofactor+Site+Chain+A'>PLA</scene>, <scene name='pdbsite=PLB:Cofactor+Site+Chain+B'>PLB</scene>, <scene name='pdbsite=PLC:Cofactor+Site+Chain+C'>PLC</scene> and <scene name='pdbsite=PLD:Cofactor+Site+Chain+D'>PLD</scene> | |SITE= <scene name='pdbsite=PLA:Cofactor+Site+Chain+A'>PLA</scene>, <scene name='pdbsite=PLB:Cofactor+Site+Chain+B'>PLB</scene>, <scene name='pdbsite=PLC:Cofactor+Site+Chain+C'>PLC</scene> and <scene name='pdbsite=PLD:Cofactor+Site+Chain+D'>PLD</scene> | ||
| - | |LIGAND= <scene name='pdbligand=DHD:2,4-DIOXO-PENTANEDIOIC ACID'>DHD</scene> | + | |LIGAND= <scene name='pdbligand=DHD:2,4-DIOXO-PENTANEDIOIC+ACID'>DHD</scene>, <scene name='pdbligand=LLP:2-LYSINE(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHANE)'>LLP</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/ | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Cystathionine_gamma-synthase Cystathionine gamma-synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.48 2.5.1.48] </span> |
|GENE= METB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |GENE= METB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cs1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cs1 OCA], [http://www.ebi.ac.uk/pdbsum/1cs1 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1cs1 RCSB]</span> | ||
}} | }} | ||
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==Reference== | ==Reference== | ||
Crystal structure of Escherichia coli cystathionine gamma-synthase at 1.5 A resolution., Clausen T, Huber R, Prade L, Wahl MC, Messerschmidt A, EMBO J. 1998 Dec 1;17(23):6827-38. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9843488 9843488] | Crystal structure of Escherichia coli cystathionine gamma-synthase at 1.5 A resolution., Clausen T, Huber R, Prade L, Wahl MC, Messerschmidt A, EMBO J. 1998 Dec 1;17(23):6827-38. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9843488 9843488] | ||
| + | [[Category: Cystathionine gamma-synthase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Transferred entry: 2 5.1 48]] | ||
[[Category: Clausen, T.]] | [[Category: Clausen, T.]] | ||
[[Category: Messerschmidt, A.]] | [[Category: Messerschmidt, A.]] | ||
| - | [[Category: DHD]] | ||
[[Category: llp-dependent enzyme]] | [[Category: llp-dependent enzyme]] | ||
[[Category: lyase]] | [[Category: lyase]] | ||
[[Category: methionine biosynthesis]] | [[Category: methionine biosynthesis]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:27:26 2008'' |
Revision as of 16:27, 30 March 2008
| |||||||
| , resolution 1.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | , , and | ||||||
| Ligands: | , | ||||||
| Gene: | METB (Escherichia coli) | ||||||
| Activity: | Cystathionine gamma-synthase, with EC number 2.5.1.48 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CYSTATHIONINE GAMMA-SYNTHASE (CGS) FROM ESCHERICHIA COLI
Overview
The transsulfuration enzyme cystathionine gamma-synthase (CGS) catalyses the pyridoxal 5'-phosphate (PLP)-dependent gamma-replacement of O-succinyl-L-homoserine and L-cysteine, yielding L-cystathionine. The crystal structure of the Escherichia coli enzyme has been solved by molecular replacement with the known structure of cystathionine beta-lyase (CBL), and refined at 1.5 A resolution to a crystallographic R-factor of 20.0%. The enzyme crystallizes as an alpha4 tetramer with the subunits related by non-crystallographic 222 symmetry. The spatial fold of the subunits, with three functionally distinct domains and their quaternary arrangement, is similar to that of CBL. Previously proposed reaction mechanisms for CGS can be checked against the structural model, allowing interpretation of the catalytic and substrate-binding functions of individual active site residues. Enzyme-substrate models pinpoint specific residues responsible for the substrate specificity, in agreement with structural comparisons with CBL. Both steric and electrostatic designs of the active site seem to achieve proper substrate selection and productive orientation. Amino acid sequence and structural alignments of CGS and CBL suggest that differences in the substrate-binding characteristics are responsible for the different reaction chemistries. Because CGS catalyses the only known PLP-dependent replacement reaction at Cgamma of certain amino acids, the results will help in our understanding of the chemical versatility of PLP.
About this Structure
1CS1 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Crystal structure of Escherichia coli cystathionine gamma-synthase at 1.5 A resolution., Clausen T, Huber R, Prade L, Wahl MC, Messerschmidt A, EMBO J. 1998 Dec 1;17(23):6827-38. PMID:9843488
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