2fkm
From Proteopedia
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| , resolution 1.900Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | AlgC (Pseudomonas aeruginosa) | ||||||
| Activity: | Phosphomannomutase, with EC number 5.4.2.8 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
PMM/PGM S108D mutant with alpha-d-glucose 1,6-bisphosphate bound
Overview
The enzyme phosphomannomutase/phosphoglucomutase (PMM/PGM) from Pseudomonas aeruginosa catalyzes the reversible conversion of 1-phospho to 6-phospho-sugars. The reaction entails two phosphoryl transfers, with an intervening 180 degrees reorientation of the reaction intermediate (e.g. glucose 1,6-bisphosphate) during catalysis. Reorientation of the intermediate occurs without dissociation from the active site of the enzyme and is, thus, a simple example of processivity, as defined by multiple rounds of catalysis without release of substrate. Structural characterization of two PMM/PGM-intermediate complexes with glucose 1,6-bisphosphate provides new insights into the reaction catalyzed by the enzyme, including the reorientation of the intermediate. Kinetic analyses of site-directed mutants prompted by the structural studies reveal active site residues critical for maintaining association with glucose 1,6-bisphosphate during its unique dynamic reorientation in the active site of PMM/PGM.
About this Structure
2FKM is a Single protein structure of sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA.
Reference
The reaction of phosphohexomutase from Pseudomonas aeruginosa: structural insights into a simple processive enzyme., Regni C, Schramm AM, Beamer LJ, J Biol Chem. 2006 Jun 2;281(22):15564-71. Epub 2006 Apr 4. PMID:16595672
Page seeded by OCA on Thu Mar 20 16:53:32 2008
