1muu | pdb_00001muu
2.0 A crystal structure of GDP-mannose dehydrogenase
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Overview
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.
About this Structure
1MUU is a Single protein structure of sequence from Pseudomonas aeruginosa with SUC, NAD and GDX as ligands. Active as GDP-mannose 6-dehydrogenase, with EC number 1.1.1.132 Full crystallographic information is available from OCA.
Reference
Crystal structure of GDP-mannose dehydrogenase: a key enzyme of alginate biosynthesis in P. aeruginosa., Snook CF, Tipton PA, Beamer LJ, Biochemistry. 2003 Apr 29;42(16):4658-68. PMID:12705829
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