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Literature summary for 1.16.1.1 extracted from

  • Freedman, Z.; Zhu, C.; Barkay, T.
    Mercury resistance and mercuric reductase activities and expression among chemotrophic thermophilic Aquificae (2012), Appl. Environ. Microbiol., 78, 6568-6575.
    View publication on PubMedView publication on EuropePMC

Cloned(Commentary)

Cloned (Comment) Organism
gene merA, DNA and amino acid sequence determination and analysis, phylogenetic analysis Hydrogenobaculum sp. Y04AAS1
gene merA, DNA and amino acid sequence determination and analysis, phylogenetic analysis Hydrogenivirga sp. 128-5-R1-1

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
Hg + NAD+ + H+ Hydrogenobaculum sp. Y04AAS1
-
Hg2+ + NADH
-
r
Hg + NAD+ + H+ Hydrogenivirga sp. 128-5-R1-1
-
Hg2+ + NADH
-
r
Hg + NADP+ + H+ Hydrogenobaculum sp. Y04AAS1
-
Hg2+ + NADPH
-
r
Hg + NADP+ + H+ Hydrogenivirga sp. 128-5-R1-1
-
Hg2+ + NADPH
-
r

Organism

Organism UniProt Comment Textmining
Hydrogenivirga sp. 128-5-R1-1 A8UT36
-
-
Hydrogenobaculum sp. Y04AAS1 B4U9T7
-
-

Source Tissue

Source Tissue Comment Organism Textmining
additional information strain AAS1 is resistant to concentration over 0.01 mM Hg2+, transforms Hg(II) to Hg(0) during cellular growth, and possesses Hg-dependent NAD(P)H oxidation activities in crude cell extracts that are optimal at temperatures corresponding with the strains' optimal growth temperature of 55°C Hydrogenobaculum sp. Y04AAS1
-
additional information strain R1-1 is resistant to concentration of over 0.01 mM Hg2+, transforms Hg(II) to Hg(0) during cellular growth, and possesses Hg-dependent NAD(P)H oxidation activities in crude cell extracts that are optimal at temperatures corresponding with the strains' optimal growth temperature of 70°C Hydrogenivirga sp. 128-5-R1-1
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
Hg + NAD+ + H+
-
Hydrogenobaculum sp. Y04AAS1 Hg2+ + NADH
-
r
Hg + NAD+ + H+
-
Hydrogenivirga sp. 128-5-R1-1 Hg2+ + NADH
-
r
Hg + NADP+ + H+
-
Hydrogenobaculum sp. Y04AAS1 Hg2+ + NADPH
-
r
Hg + NADP+ + H+
-
Hydrogenivirga sp. 128-5-R1-1 Hg2+ + NADPH
-
r

Synonyms

Synonyms Comment Organism
MerA
-
Hydrogenivirga sp. 128-5-R1-1
mercuric reductase
-
Hydrogenobaculum sp. Y04AAS1
mercuric reductase
-
Hydrogenivirga sp. 128-5-R1-1

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
-
Hydrogenobaculum sp. Y04AAS1
70
-
-
Hydrogenivirga sp. 128-5-R1-1

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 70 activity range, very low activity below 40°C Hydrogenobaculum sp. Y04AAS1
60 87 activity range, very low activities below 40°C Hydrogenivirga sp. 128-5-R1-1

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.4
-
assay at Hydrogenobaculum sp. Y04AAS1
7.4
-
assay at Hydrogenivirga sp. 128-5-R1-1

Cofactor

Cofactor Comment Organism Structure
NAD+
-
Hydrogenobaculum sp. Y04AAS1
NAD+
-
Hydrogenivirga sp. 128-5-R1-1
NADH
-
Hydrogenobaculum sp. Y04AAS1
NADH
-
Hydrogenivirga sp. 128-5-R1-1
NADP+
-
Hydrogenobaculum sp. Y04AAS1
NADP+
-
Hydrogenivirga sp. 128-5-R1-1
NADPH
-
Hydrogenobaculum sp. Y04AAS1
NADPH
-
Hydrogenivirga sp. 128-5-R1-1

Expression

Organism Comment Expression
Hydrogenobaculum sp. Y04AAS1 the enzyme is induced by Hg up
Hydrogenivirga sp. 128-5-R1-1 the enzyme is induced by Hg up

General Information

General Information Comment Organism
additional information strain R1-1 is resistant to concentration of over 0.01 mM Hg2+, transforms Hg(II) to Hg(0) during cellular growth, and possesses Hg-dependent NAD(P)H oxidation activities in crude cell extracts that are optimal at temperatures corresponding with the strains' optimal growth temperature of 70°C Hydrogenivirga sp. 128-5-R1-1