1kkm
From Proteopedia
| Line 4: | Line 4: | ||
|PDB= 1kkm |SIZE=350|CAPTION= <scene name='initialview01'>1kkm</scene>, resolution 2.80Å | |PDB= 1kkm |SIZE=350|CAPTION= <scene name='initialview01'>1kkm</scene>, resolution 2.80Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= PTSK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1582 Lactobacillus casei]), PTSH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 Bacillus subtilis]) | |GENE= PTSK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1582 Lactobacillus casei]), PTSH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 Bacillus subtilis]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1kkl|1KKL]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kkm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kkm OCA], [http://www.ebi.ac.uk/pdbsum/1kkm PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1kkm RCSB]</span> | ||
}} | }} | ||
| Line 30: | Line 33: | ||
[[Category: Nessler, S.]] | [[Category: Nessler, S.]] | ||
[[Category: Poncet, S.]] | [[Category: Poncet, S.]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: PO4]] | ||
[[Category: bacteria]] | [[Category: bacteria]] | ||
[[Category: phosphorylation]] | [[Category: phosphorylation]] | ||
| Line 38: | Line 39: | ||
[[Category: protein/protein interaction]] | [[Category: protein/protein interaction]] | ||
| - | ''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 21:49:55 2008'' |
Revision as of 18:49, 30 March 2008
| |||||||
| , resolution 2.80Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Gene: | PTSK (Lactobacillus casei), PTSH (Bacillus subtilis) | ||||||
| Related: | 1KKL
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
L.casei HprK/P in complex with B.subtilis P-Ser-HPr
Overview
HPr kinase/phosphorylase (HprK/P) controls the phosphorylation state of the phosphocarrier protein HPr and regulates the utilization of carbon sources by Gram-positive bacteria. It catalyzes both the ATP-dependent phosphorylation of Ser-46 of HPr and its dephosphorylation by phosphorolysis. The latter reaction uses inorganic phosphate as substrate and produces pyrophosphate. We present here two crystal structures of a complex of the catalytic domain of Lactobacillus casei HprK/P with Bacillus subtilis HPr, both at 2.8-A resolution. One of the structures was obtained in the presence of excess pyrophosphate, reversing the phosphorolysis reaction and contains serine-phosphorylated HPr. The complex has six HPr molecules bound to the hexameric kinase. Two adjacent enzyme subunits are in contact with each HPr molecule, one through its active site and the other through its C-terminal helix. In the complex with serine-phosphorylated HPr, a phosphate ion is in a position to perform a nucleophilic attack on the phosphoserine. Although the mechanism of the phosphorylation reaction resembles that of eukaryotic protein kinases, the dephosphorylation by inorganic phosphate is unique to the HprK/P family of kinases. This study provides the structure of a protein kinase in complex with its protein substrate, giving insights into the chemistry of the phospho-transfer reactions in both directions.
About this Structure
1KKM is a Protein complex structure of sequences from Bacillus subtilis and Lactobacillus casei. Full crystallographic information is available from OCA.
Reference
X-ray structure of a bifunctional protein kinase in complex with its protein substrate HPr., Fieulaine S, Morera S, Poncet S, Mijakovic I, Galinier A, Janin J, Deutscher J, Nessler S, Proc Natl Acad Sci U S A. 2002 Oct 15;99(21):13437-41. Epub 2002 Oct 1. PMID:12359875
Page seeded by OCA on Sun Mar 30 21:49:55 2008
