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Literature summary for 1.13.11.20 extracted from

  • Davies, C.G.; Fellner, M.; Tchesnokov, E.P.; Wilbanks, S.M.; Jameson, G.N.
    The Cys-Tyr cross-link of cysteine dioxygenase changes the optimal pH of the reaction without a structural change (2014), Biochemistry, 53, 7961-7968 .
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
recombinant expression of wild-type and mutant Strep-tagged enzyme Rattus norvegicus

Crystallization (Commentary)

Crystallization (Comment) Organism
purified enzyme, hanging drop vapour diffusion method, mixing of 0.0015 ml of 7 mg/mL CDO mutant C93G in 10 mM sodium phosphate and 20 mM NaCl, pH 7.5, and 0.0006 ml of crushed wild-type CDO crystal seeds in their own growth solution consisting of 25% w/v PEG 1500, 13 mM succinate, 44 mM sodium phosphate, and 44 mM glycine, pH 5.2, with 0.0015 ml of reservoir buffer containing 26% w/v PEG 4000, 200 mM ammonium acetate, and 100 mM sodium citrate, pH 6.3, equilibration against reservoir solution, X-ray diffraction structure determination and analysis at 1.82 A resolution Rattus norvegicus

Protein Variants

Protein Variants Comment Organism
C93G site-directed mutagenesis, structure comparison to the wild-type enzyme Rattus norvegicus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information steady-state Michaelis-Menten kinetics Rattus norvegicus
0.002
-
L-cysteine 20% cross-linked wild-type enzyme, pH 9.1, temperature not specified in the publication Rattus norvegicus
0.003
-
L-cysteine not cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus
0.005
-
L-cysteine 60% cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus

Metals/Ions

Metals/Ions Comment Organism Structure
Fe2+ active site bound, reconstitution of the purified enzyme Rattus norvegicus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-cysteine + O2 Rattus norvegicus
-
3-sulfinoalanine
-
?

Organism

Organism UniProt Comment Textmining
Rattus norvegicus P21816
-
-

Purification (Commentary)

Purification (Comment) Organism
recombinant Strep-tagged wild-type and mutant enzyme by affinity chromatography to over 95% purity Rattus norvegicus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-cysteine + O2
-
Rattus norvegicus 3-sulfinoalanine
-
?

Synonyms

Synonyms Comment Organism
CDO
-
Rattus norvegicus

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
0.12
-
L-cysteine 20% cross-linked wild-type enzyme, pH 9.1, temperature not specified in the publication Rattus norvegicus
0.25
-
L-cysteine 60% cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus
0.33
-
L-cysteine not cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
additional information
-
pH-dependence of wild-type and mutant enzyme kinetics, detailed overview Rattus norvegicus
7.7
-
60% cross-linked wild-type enzyme Rattus norvegicus

Cofactor

Cofactor Comment Organism Structure
Cys-Tyr cofactor
-
Rattus norvegicus

General Information

General Information Comment Organism
additional information modeling the pH-dependence of cysteine dioxygenation Rattus norvegicus

kcat/KM [mM/s]

kcat/KM Value [1/mMs-1] kcat/KM Value Maximum [1/mMs-1] Substrate Comment Organism Structure
0.056
-
L-cysteine 20% cross-linked wild-type enzyme, pH 9.1, temperature not specified in the publication Rattus norvegicus
0.056
-
L-cysteine 60% cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus
0.095
-
L-cysteine not cross-linked wild-type enzyme, pH 7.7, temperature not specified in the publication Rattus norvegicus