1jlh
| |||||||
| , resolution 2.10Å | |||||||
|---|---|---|---|---|---|---|---|
| Activity: | Glucose-6-phosphate isomerase, with EC number 5.3.1.9 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Human Glucose-6-phosphate Isomerase
OverviewOverview
The second enzyme in the glycolytic pathway, phosphoglucose isomerase (PGI), catalyses an intracellular aldose-ketose isomerization. Here we describe the human recombinant PGI structure (hPGI) solved in the absence of active site ligands. Crystals isomorphous to those previously reported were used to collect a 94% complete data set to a limiting resolution of 2.1 A. From the comparison between the free active site hPGI structure and the available human and rabbit PGI (rPGI) structures, a mechanism for protein initial catalytic steps is proposed. Binding of the phosphate moiety of the substrate to two distinct elements of the active site is responsible for driving a series of structural changes resulting in the polarisation of the active site histidine, priming it for the initial ring-opening step of catalysis.
DiseaseDisease
Known diseases associated with this structure: Hemolytic anemia due to glucosephosphate isomerase deficiency OMIM:[172400], Hydrops fetalis, one form OMIM:[172400]
About this StructureAbout this Structure
1JLH is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of human phosphoglucose isomerase and analysis of the initial catalytic steps., Cordeiro AT, Godoi PH, Silva CH, Garratt RC, Oliva G, Thiemann OH, Biochim Biophys Acta. 2003 Feb 21;1645(2):117-22. PMID:12573240
Page seeded by OCA on Thu Mar 20 12:05:07 2008