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Literature summary extracted from

  • Kiritani, K.; Wagner, R.P.
    alpha,beta-Dihydroxy acid dehydratase (Neurospora crassa and spinach) (1970), Methods Enzymol., 17A, 755-764.
No PubMed abstract available

Inhibitors

EC Number Inhibitors Comment Organism Structure
4.2.1.9 EDTA
-
Neurospora crassa
4.2.1.9 EDTA
-
Spinacia oleracea
4.2.1.9 NaF
-
Spinacia oleracea
4.2.1.9 PCMB
-
Spinacia oleracea

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
4.2.1.9 2
-
2,3-dihydroxyisovalerate
-
Spinacia oleracea
4.2.1.9 6.3
-
2,3-dihydroxy-3-methylpentanoate
-
Spinacia oleracea

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
4.2.1.9 Co2+ activates Spinacia oleracea
4.2.1.9 Mg2+ required Neurospora crassa
4.2.1.9 Mg2+ required for maximal activity, maximal activity at 0.01 M Spinacia oleracea
4.2.1.9 Mn2+ activates Spinacia oleracea

Organism

EC Number Organism UniProt Comment Textmining
4.2.1.9 Neurospora crassa
-
-
-
4.2.1.9 Spinacia oleracea
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
4.2.1.9
-
Neurospora crassa
4.2.1.9
-
Spinacia oleracea

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
4.2.1.9 0.18
-
-
Spinacia oleracea
4.2.1.9 10.13
-
-
Neurospora crassa

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4.2.1.9 2,3-dihydroxy-3-methylbutanoate
-
Neurospora crassa 2-oxoisovalerate + H2O
-
?
4.2.1.9 2,3-dihydroxy-3-methylbutanoate
-
Spinacia oleracea 2-oxoisovalerate + H2O
-
?
4.2.1.9 2,3-dihydroxy-3-methylpentanoate
-
Neurospora crassa 3-methyl-2-oxopentanoate + H2O
-
?
4.2.1.9 2,3-dihydroxy-3-methylpentanoate
-
Spinacia oleracea 3-methyl-2-oxopentanoate + H2O
-
?

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
4.2.1.9 7.7 8 2,3-dihydroxy-3-methylpentanoate Neurospora crassa
4.2.1.9 8 8.2 2,3-dihydroxy-3-methylpentanoate, 2,3-dihydroxyisovalerate Spinacia oleracea
4.2.1.9 8 8.3 2,3-dihydroxyisovalerate Neurospora crassa