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BRENDA support

Ligand Cr6+

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Basic Ligand Information

Molecular Structure
Picture of Cr6+ (click for magnification)
Molecular Formula
BRENDA Name
InChIKey
Cr
Cr6+
JOPOVCBBYLSVDA-UHFFFAOYSA-N
Synonyms:
Cr(VI)

Roles as Enzyme Ligand

In Vivo Substrate in Enzyme-catalyzed Reactions (1 result)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
Cr(VI) + NADPH + H+ = Cr(III) + NADP+
show the reaction diagram
-

Substrate in Enzyme-catalyzed Reactions (2 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
H2 + Cr6+ = Cr3+ + H+
show the reaction diagram
-
Cr(VI) + NADPH + H+ = Cr(III) + NADP+
show the reaction diagram
-

Inhibitor in Enzyme-catalyzed Reactions (13 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
1 mM, complete inhibition
-
decrease of enzyme mRNA level together with heme oxygenase-1 and glutathione S-transferase Ya
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0.001 mM, 62% inhibition, 10 mM nitrilotriacetic acid does not protect
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hexavalent chromium causes pronounced inhibition of TrxR, the inhibition of TrxR is not reversed by removal of residual Cr6+ or by NADPH. In cells treated with 0.025 or 0.050 mM Cr6+ for 90 min, TrxR activity is inhibited by 71 and 77%, respectively, while after 180 min of the same treatments, TrxR is inhibited by 97 and 85%, respectively
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58% inhibition at 10 mg/l
-
weak inhibitor
-
as Na2CrO4, induces clonogenic lethality
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80.9% residual activity at 1 mM
-
CrVI, a heavy metal endocrine-disrupting chemical industrially widely used, gestational exposure to CrVI increases germ cell/oocyte apoptosis and advance germ cell nest (GCN) breakdown. CrVI increases X-prolyl aminopeptidase (Xpnpep) 2 (a marker for premature ovarian failure in humans) during germ cell nest (GCN) breakdown, it decreases Xpnpep2 during postnatal follicle development, and increases colocalization of Xpnpep2 with collagens Col3 and Col4. Phenotype, overview
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Metals and Ions (1 result)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
maximal enzyme stimulation at 10-8 M, inhibition at 10-5 M
-

Enzyme Kinetic Parameters

kcat Value (Turnover Number) (3 results)

EC NUMBER
TURNOVER NUMBER [1/S]
TURNOVER NUMBER MAXIMUM [1/S]
COMMENTARY
LITERATURE

KM Value (3 results)

EC NUMBER
KM VALUE [MM]
KM VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE
7.26
-
pH 7.5, 30°C, recombinant His10-tagged enzyme

References & Links

Links to other databases for Cr6+

ChEBI
PubChem
ChEBI
PubChem