Crystal structure of GDP-mannose dehydrogenase: A key enzyme of alginate biosynthesis in P. aeruginosaSnook, C.F., Tipton, P.A., Beamer, L.J.
(2003) Biochemistry 42: 4658-4668
- PubMed: 12705829
- DOI: 10.1021/bi027328k
- Primary Citation of Related Structures:
1MFZ, 1MV8, 1MUU
- PubMed Abstract:
- Allosterism and cooperativity in Pseudomonas aeruginosa GDP-mannose dehydrogenase
Naught, L.E., Gilbert, S., Imhoff, R., Snook, C., Beamer, L., Tipton, P.
(2002) Biochemistry 41: 9637
The enzyme GMD from Pseudomonas aeruginosa catalyzes the committed step in the synthesis of the exopolysaccharide alginate. Alginate is a major component of P. aeruginosa biofilms that protect the bacteria from the host immune response and antibiotic therapy ...
The enzyme GMD from Pseudomonas aeruginosa catalyzes the committed step in the synthesis of the exopolysaccharide alginate. Alginate is a major component of P. aeruginosa biofilms that protect the bacteria from the host immune response and antibiotic therapy. The 1.55 A crystal structure of GMD in ternary complex with its cofactor NAD(H) and product GDP-mannuronic acid reveals that the enzyme forms a domain-swapped dimer with two polypeptide chains contributing to each active site. The extensive dimer interface provides multiple opportunities for intersubunit communication. Comparison of the GMD structure with that of UDP-glucose dehydrogenase reveals the structural basis of sugar binding specificity that distinguishes these two related enzyme families. The high-resolution structure of GMD provides detailed information on the active site of the enzyme and a template for structure-based inhibitor design.
Department of Biochemistry, 117 Schweitzer Hall, University of Missouri-Columbia, Columbia, Missouri 65211, USA.