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Literature summary for 4.2.1.80 extracted from

  • Montgomery, M.G.; Coker, A.R.; Taylor, I.A.; Wood, S.P.
    Assembly of a 20-nm protein cage by Escherichia coli 2-hydroxypentadienoic acid hydratase (2010), J. Mol. Biol., 396, 1379-1391.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
ligated into a modified pET22b expression vector encoding a His6 tag and expressed in Escherichia coli BL21(DE3) cells Escherichia coli K-12

Crystallization (Commentary)

Crystallization (Comment) Organism
MhpD with and without Mg2+, by hanging-drop vapour-diffusion method, to 2.8 A resolution. Space group of the crystals is H3 with unit cell parameters a = 207.35 A, b = 207.35 A, c = 545.47 A, alpha = 90°, beta = 90°, and gamma = 120°. Assembles to form a 20-nm-diameter particle comprising 60 protein subunits, arranged with 532 symmetry when crystallised at low pH in the presence of phosphate or sulphate ions. Particles form rapidly and are stable in solution during gel filtration at low pH. They are probably formed through trimers of pentamers, which are stabilised by the interaction of two phosphate ions with residues of the N-terminal domains of subunits at the 3fold axis. Once the particles are formed at high concentrations of phosphate (or sulphate), they remain stable in solution at 20fold lower concentrations of the anion. Guest molecules can be trapped within the hollow protein shell during assembly. The C-termini of the subunits are freely accessible on the surface of the protein cage Escherichia coli K-12

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+ active site of MhpD consists of three acidic residues (Glu105, Glu107, and Glu138), which may be involved in coordinating the divalent cation essential for activity Escherichia coli K-12

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
30000
-
5 * 35000, fusion protein, SDS-PAGE. 5 * 30000, purified protein, SDS-PAGE Escherichia coli K-12
35000
-
5 * 35000, fusion protein, SDS-PAGE. 5 * 30000, purified protein, SDS-PAGE Escherichia coli K-12
151000
-
gel filtration-multiangle laser light scattering Escherichia coli K-12

Organism

Organism UniProt Comment Textmining
Escherichia coli K-12 P77608
-
-

Purification (Commentary)

Purification (Comment) Organism
by centrifugation and gel filtration Escherichia coli K-12

Subunits

Subunits Comment Organism
pentamer 5 * 35000, fusion protein, SDS-PAGE. 5 * 30000, purified protein, SDS-PAGE Escherichia coli K-12

Synonyms

Synonyms Comment Organism
2-hydroxypentadienoic acid hydratase
-
Escherichia coli K-12
HPD hydratase
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Escherichia coli K-12
MhpD
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Escherichia coli K-12