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Literature summary for 1.11.1.6 extracted from

  • Hayashi, K.; Maekawa, I.; Tanaka, K.; Ijyuin, S.; Shiwa, Y.; Suzuki, I.; Niimura, Y.; Kawasaki, S.
    Purification and characterization of oxygen-inducible haem catalase from oxygen-tolerant Bifidobacterium asteroides (2013), Microbiology, 159, 89-95.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
gene katA, DNA and amino acid sequence determination, comparison, and analysis Bifidobacterium asteroides

Localization

Localization Comment Organism GeneOntology No. Textmining
cytoplasm
-
Bifidobacterium asteroides 5737
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
55000
-
2 * 55000, SDS-PAGE Bifidobacterium asteroides
110000
-
about, gel filtration Bifidobacterium asteroides

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 H2O2 Bifidobacterium asteroides
-
O2 + 2 H2O
-
?
2 H2O2 Bifidobacterium asteroides JCM 8230
-
O2 + 2 H2O
-
?

Organism

Organism UniProt Comment Textmining
Bifidobacterium asteroides L8B3D7 originally isolated from honeybee intestine, gene katA
-
Bifidobacterium asteroides JCM 8230 L8B3D7 originally isolated from honeybee intestine, gene katA
-

Purification (Commentary)

Purification (Comment) Organism
active native enzyme by ultracentrifugation, streptomycin sulfate treatment, by drophobic interaction, anion exchange, and hydroxyapatite chromatography, gel filtration, followed by another step of anion exchange chromatography Bifidobacterium asteroides

Source Tissue

Source Tissue Comment Organism Textmining
additional information catalase activity absolutely depends on exposure to O2 and occurs in cells grown in medium containing a heme source, these cells show higher viability on exposure to H2O2, growth optimum 37°C Bifidobacterium asteroides
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
6400
-
purified enzyme, pH 6,5, 37°C Bifidobacterium asteroides

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 H2O2
-
Bifidobacterium asteroides O2 + 2 H2O
-
?
2 H2O2
-
Bifidobacterium asteroides JCM 8230 O2 + 2 H2O
-
?

Subunits

Subunits Comment Organism
homodimer 2 * 55000, SDS-PAGE Bifidobacterium asteroides

Synonyms

Synonyms Comment Organism
haem catalase
-
Bifidobacterium asteroides

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
40
-
-
Bifidobacterium asteroides

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5
-
-
Bifidobacterium asteroides

Cofactor

Cofactor Comment Organism Structure
heme
-
Bifidobacterium asteroides

Expression

Organism Comment Expression
Bifidobacterium asteroides expression of the katA gene is induced in response to O2 exposure up