5HHF image
Deposition Date 2016-01-10
Release Date 2016-02-17
Last Version Date 2023-09-27
Entry Detail
PDB ID:
5HHF
Keywords:
ISOMERASE
Title:
Crystal structure of Aspergillus fumigatus UDP-Galactopyranose mutase mutant H63A with covalent FAD-Galactopyranose and bound UDP
Biological Source:
Source Organism:
Neosartorya fumigata (Taxon ID: 746128)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.30 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 65 2 2
5HHF validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:UDP-galactopyranose mutase
Gene (Uniprot):glfA
Mutagens:H63A
Chain IDs:A, B, C, D
Chain Length:513
Number of Molecules:4
Biological Source:Neosartorya fumigata
UniProt ID:Q4W1X2 Pfam ID:PF13450 EC:5.4.99.9
Ligand Molecules
62F
FDA
MRY
SO4
UDP
Primary Citation
In Crystallo Capture of a Covalent Intermediate in the UDP-Galactopyranose Mutase Reaction.
Biochemistry 55 833 836 (2016)
PMID: 26836146 DOI: 10.1021/acs.biochem.6b00035

Abstact

UDP-galactopyranose mutase (UGM) plays an essential role in galactofuranose biosynthesis in pathogens by catalyzing the conversion of UDP-galactopyranose to UDP-galactofuranose. Here we report the first crystal structure of a covalent intermediate in the UGM reaction. The 2.3 Å resolution structure reveals UDP bound in the active site and galactopyranose linked to the FAD through a covalent bond between the anomeric C of galactopyranose and N5 of the FAD. The structure confirms the role of the flavin as nucleophile and supports the hypothesis that the proton destined for O5 of galactofuranose is shuttled from N5 of the FAD via O4 of the FAD.

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Primary Citation of related structures
5HHF