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Literature summary for 1.8.1.2 extracted from

  • Johnson, E.F.; Mukhopadhyay, B.
    A new type of sulfite reductase, a novel coenzyme F420-dependent enzyme, from the methanarchaeon Methanocaldococcus jannaschii (2005), J. Biol. Chem., 280, 38776-38786.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
coenzyme F420
-
Methanocaldococcus jannaschii

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0122
-
sulfite within a sulfite concentration range of 0.0014-0.3 mM and with a fixed reduced F420 concentration of 0.04 mM Methanocaldococcus jannaschii
0.021
-
reduced F420 at a fixed sulfite concentration of 0.29 mM and within a reduced F420 concentration range of 0.004-0.06 mM Methanocaldococcus jannaschii

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
70000
-
SDS-PAGE Methanocaldococcus jannaschii
350000
-
gel filtration Methanocaldococcus jannaschii

Organism

Organism UniProt Comment Textmining
Methanocaldococcus jannaschii
-
-
-

Purification (Commentary)

Purification (Comment) Organism
phenyl-Sepharose chromatography, F420-Sepharose chromatography and QAE-Sephadex gel filtration Methanocaldococcus jannaschii

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.0013
-
in 50 mM potassium phosphate buffer (pH 7), 0.044 mM reduced F420, and 1.5 mM sodium sulfite, from cell extract Methanocaldococcus jannaschii
0.0182
-
in 50 mM potassium phosphate buffer (pH 7), 0.044 mM reduced F420, and 1.5 mM sodium sulfite, after 14fold purification Methanocaldococcus jannaschii

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
sulfite + reduced F420
-
Methanocaldococcus jannaschii sulfide + oxidized F420
-
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Synonyms

Synonyms Comment Organism
coenzyme F420-dependent sulfite reductase
-
Methanocaldococcus jannaschii
Fsr
-
Methanocaldococcus jannaschii
sulfite reductase
-
Methanocaldococcus jannaschii

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
95
-
-
Methanocaldococcus jannaschii

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7
-
-
Methanocaldococcus jannaschii