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Information on EC 1.14.11.8 - trimethyllysine dioxygenase and Organism(s) Homo sapiens and UniProt Accession Q9NVH6
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1.14.11.8 trimethyllysine dioxygenaseIUBMB Comments
Requires Fe2+ and ascorbate.
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Word Map
- 1.14.11.8
- carnitine
- gamma-butyrobetaine
-
autism
-
inborn
-
proliferator-activated
- hydroxymethyltransferase
-
transporter-2
- aldolase
The taxonomic range for the selected organisms is: Homo sapiens
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Reaction Schemes
Synonyms
trimethyllysine hydroxylase, tmlh-b, epsilon-n-trimethyllysine hydroxylase, 6-n-trimethyllysine dioxygenase, tmlh-a, trimethyllysine dioxygenase, tml hydroxylase, tml dioxygenase, 
more
topSYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
epsilon-trimethyllysine 2-oxoglutarate dioxygenase
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-
-
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oxygenase, trimethyllysine di-
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-
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TML dioxygenase
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-
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TML hydroxylase
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-
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TML-alpha-ketoglutarate dioxygenase
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-
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TMLD
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-
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trimethyllysine alpha-ketoglutarate dioxygenase
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
redox reaction
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-
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SYSTEMATIC NAME
IUBMB Comments
N6,N6,N6-trimethyl-L-lysine,2-oxoglutarate:oxygen oxidoreductase (3-hydroxylating)
Requires Fe2+ and ascorbate.
CAS REGISTRY NUMBER
COMMENTARY
84012-77-1
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
N5,N5,N5-trimethyl-L-ornithine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N5,N5,N5-trimethyl-L-ornithine + succinate + CO2
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
?
N6,N6-dimethyl-N6-ethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6-dimethyl-N6-ethyl-L-lysine + succinate + CO2
-
-
-
?
N6,N6-dimethyl-N6-isopropyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6-dimethyl-N6-isopropyl-L-lysine + succinate + CO2
-
-
-
?
N6,N6-dimethyl-N6-propyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6-dimethyl-N6-propyl-L-lysine + succinate + CO2
-
-
-
?
N6-fluoromethyl-N6,N6-dimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6-fluoromethyl-N6,N6-dimethyl-L-lysine + succinate + CO2
Nepsilon-trimethyllysine analogue that contains the fluoromethyl group can be used as a 1H and 19F NMR probe for studies on TMLH catalysis
-
-
?
N7,N7,N7-trimethyl-L-alpha-homolysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N7,N7,N7-trimethyl-L-alpha-homolysine + succinate + CO2
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
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-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
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-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
the enzymatic hydroxylation occurs at the C-3 site of (2S)-Nepsilon-trimethyllysine substrate. Comparative NMR spectroscopic studies (with two enantiopure synthetic standards that possess 3R and 3S stereochemistry) on the enzymatically produced (2S)-3-hydroxy-Nepsilon-trimethyllysine reveal that TMLH exclusively catalyzes the formation of (3S)-3-hydroxy-Nepsilon-trimethyl-L-lysine, not forming any (3R)-3-hydroxy-Nepsilon-trimethyl-L-lysine diastereoisomer
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-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
recognition sites that contribute to the enzymatic activity of the enzyme (TMLH): the Fe(II)-binding H242-D244-H389 residues, R391-R398 involved in 2-oxoglutarate-binding, and several residues (D231, N334, and the aromatic cage comprised of W221, Y217 and Y234) associated with binding of (2S)-Nepsilon-trimethyllysine
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-
?
additional information
?
-
determination of the (2S,3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine and N6,N6,N6-trimethyl-L-lysine is performed by ultraperformance liquid chromatographytandem mass spectrometry (UPLC/MS/MS) in positive ion electrospray mode
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-
?
additional information
?
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NMR spectrosopic structure analysis of substrates and products
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-
?
additional information
?
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NMR spectrosopic structure analysis of substrates and products, substrate specificity, overview. No or poor activity with dimethyllysine, methyllysine, lysine, D-trimethyllysine, 5-trimethylamino-1-aminopentane, trimethyllysine, 6-trimethylaminohexanoic acid, hexamethyllysine, N-acetyltrimethyllysine, trimethyldiaminobutyric acid, triethyllysine, symmetric and asymmetric dimethylarginines, mildronate, and gamma-butyrobetaine, structure-activity relationship study
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?
additional information
?
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NMR spectrosopic structure analysis of substrates and products, substrate specificity, overview. No or poor activity with dimethyllysine, methyllysine, lysine, D-trimethyllysine, 5-trimethylamino-1-aminopentane, trimethyllysine, 6-trimethylaminohexanoic acid, hexamethyllysine, N-acetyltrimethyllysine, trimethyldiaminobutyric acid, triethyllysine, symmetric and asymmetric dimethylarginines, mildronate, and gamma-butyrobetaine, structure-activity relationship study
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-
?
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
-
-
-
?
N6,N6,N6-trimethyl-L-lysine + 2-oxoglutarate + O2
(3S)-3-hydroxy-N6,N6,N6-trimethyl-L-lysine + succinate + CO2
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-
-
-
?
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Fe2+
Fe2+
dependent on, non-heme Fe(II) and 2-oxoglutarate dependent oxygenase, Fe2+ is required for catalysis
ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
additional information
additional information
Michaelis-Menten kinetics
-
0.636
N6,N6,N6-Trimethyl-L-lysine
recombinant MBP-tagged enzyme, pH 7.0, 37°C
0.696
N6,N6,N6-Trimethyl-L-lysine
recombinant detagged enzyme, pH 7.0, 37°C
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
7.5
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
37
ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
SOURCE
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY
GeneOntology No.
LITERATURE
SOURCE
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
evolution
metabolism
physiological function
additional information
evolution
the enzyme belongs to the family of 2-oxoglutarate (2OG)-dependent oxygenases
evolution
the enzyme belongs to the family of 2-oxoglutarate (2OG)-dependent oxygenases. Members of Fe(II) and 2-oxoglutarate-dependent oxygenases catalyze stereoselective hydroxylations of unactivated C-H bonds in various (bio)molecules, including proteins, DNA, and small molecule metabolites
evolution
the enzyme belongs to the non-heme Fe(II) and 2-oxoglutarate dependent oxygenases
metabolism
the enzyme catalyses the first step in mammalian biosynthesis of carnitine, which plays a crucial role in fatty acid metabolism. Carnitine biosynthesis patway, overview
metabolism
trimethyllysine hydroxylase (TMLH) catalyses C-3 hydroxylation of Nepsilon-trimethyllysine in the first step of carnitine biosynthesis
metabolism
trimethyllysine hydroxylase (TMLH) catalyses C-3 hydroxylation of Nepsilon-trimethyllysine in the first step of carnitine biosynthesis in humans
metabolism
trimethyllysine hydroxylase (TMLH) catalyses the first step in carnitine biosynthesis, the conversion of N6,N6,N6-trimethyl-L-lysine to 3-hydroxy-N6,N6,N6-trimethyl-L-lysine
metabolism
trimethyllysine hydroxylase (TMLH) is involved in the first step of the physiologically important carnitine biosynthesis pathway. The enzyme catalyzes C-3 hydroxylation of (2S)-Nepsilon-L-trimethyllysine, to produce 3-hydroxy-Nepsilon-L-trimethyllysine, which then undergoes three additional enzymatic steps to the final L-carnitine
physiological function
trimethyllysine hydroxylase (TMLH) catalyses C-3 hydroxylation of Nepsilon-trimethyllysine in the first step of carnitine biosynthesis
physiological function
trimethyllysine hydroxylase (TMLH) catalyses C-3 hydroxylation of Nepsilon-trimethyllysine in the first step of carnitine biosynthesis in humans
physiological function
the enzyme catalyzes the first step in carnitine biosynthesis
additional information
residue Asp131 in TMLHis responsible for specific binding of the alpha-ammonium group of trimethyllysine
additional information
-
residue Asp131 in TMLHis responsible for specific binding of the alpha-ammonium group of trimethyllysine
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION
The reliability class of the localization prediction ranges from 1 (very reliable) to 5 (not reliable).
The reliability class of the localization prediction ranges from 1 (very reliable) to 5 (not reliable). TMLH_HUMAN
421
0
49518
Swiss-Prot
other Location (Reliability: 5)
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
D244E
the Km-value of the variant enzyme for N6,N6,N6-trimethyl-L-lysine is 3.7fold lower than the Km-value of the wild-type enzyme, the Km-value of the variant enzyme for 2-oxoglutarate is 2.7fold higher than the Km-value of the wild-type enzyme
T269A
the Thr269Ala variant displays high enzymatic activity (96% at 0.10 mM, 76% at 0.003 mM) for the conversion of (2S)-Nepsilon-trimethyllysine to (2S,3S)-3-hydroxy-Nepsilon-trimethyllysine
W221F
the variant displays considerably reduced enzymatic activity (32%), implying that the OH group of Tyr404 contributes to stronger interaction with the trimethylammonium group of (2S)-Nepsilon-trimethyllysine
Y217D
the variants does not display any enzymatic activity within limits of detection
Y217E
the Thr269Ala variant displays high enzymatic activity (96% at 0.10 mM, 76% at 0.003 mM) for the conversion of (2S)-Nepsilon-trimethyllysine to (2S,3S)-3-hydroxy-Ne-trimethyllysine
STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
4°C, recombinant enzyme, after storage at 4°C for 4 days, MBP-TMLH retains 96% of its activity, while detagged TMLH shows only 77% activity compared to fresh enzyme preparation
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant active and stable His- and MBP-tagged TMLH from Escherichia coli strain BL21-AI by nickel or amylose affinity chromatography. It is possible that the His6-tag at the N-terminus of the fusion protein is masked and cannot be accessed by the Ni-beads. Thus, MBP affinity purification is selected as a first purification step, followed by gel filtration, His6-MBP-tag cleavage by recombinant TEV protease
recombinant MBP-taged enzyme by affinity chromatography, tag cleavage by rTEV protease, and gel filtration
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
gene TMLH, recombinant overexpression of active and stable TMLH as a His-tagged maltose-binding protein fusion in Escherichia coli strain BL21-AI. Coexpression of the enzyme with chaperones GroES/EL increases the expression level by one order of magnitude
when the putative cDNA is expressed in either Escherichia coli or Saccharomyces cerevisiae no enzyme activity can be detected in lysates of theses cells. High activity can be measured in lysates of COS cells transfected with the putative rat cDNA, whereas only low activity is measured in lysates of cells transfected with the pcDNA3 vector without insert
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Vaz, F.M.; Ofman, R.; Westinga, K.; Back, J.W.; Wanders, R.J.A.
Molecular and biochemical characterization of rat epsilon-N-trimethyllysine hydroxylase, the first enzyme of carnitine biosynthesis
J. Biol. Chem.
276
33512-33517
2001
Mus musculus (Q91ZE0), Mus musculus, Rattus norvegicus (Q91ZW6), Homo sapiens (Q9NVH6), Homo sapiens
Monfregola, J.; Cevenini, A.; Terracciano, A.; van Vlies, N.; Arbucci, S.; Wanders, R.J.; DUrso, M.; Vaz, F.M.; Ursini, M.V.
Functional analysis of TMLH variants and definition of domains required for catalytic activity and mitochondrial targeting
J. Cell. Physiol.
204
839-847
2005
Homo sapiens, Mus musculus
Al Temimi, A.H.; Pieters, B.J.; Reddy, Y.V.; White, P.B.; Mecinovic, J.
Substrate scope for trimethyllysine hydroxylase catalysis
Chem. Commun. (Camb.)
52
12849-12852
2016
Homo sapiens (Q9NVH6), Homo sapiens
Lesniak, R.; Markolovic, S.; Tars, K.; Schofield, C.
Human carnitine biosynthesis proceeds via (2S,3S)-3-hydroxy-Nepsilon-trimethyllysine
Chem. Commun. (Camb.)
53
440-442
2017
Homo sapiens (Q9NVH6)
Vijayendar Reddy, Y.; Al Temimi, A.H.; Mecinovic, J.
Fluorinated trimethyllysine as a (19)F NMR probe for trimethyllysine hydroxylase catalysis
Org. Biomol. Chem.
15
1350-1354
2017
Homo sapiens (Q9NVH6)
Reddy, Y.V.; Al Temimi, A.H.; White, P.B.; Mecinovi?, J.
Evidence that trimethyllysine hydroxylase catalyzes the formation of (2S,3S)-3-hydroxy-N(epsilon)-trimethyllysine
Org. Lett.
19
400-403
2017
Homo sapiens (Q9NVH6), Homo sapiens
Kazaks, A.; Makrecka-Kuka, M.; Kuka, J.; Voronkova, T.; Akopjana, I.; Grinberga, S.; Pugovics, O.; Tars, K.
Expression and purification of active, stabilized trimethyllysine hydroxylase
Protein Expr. Purif.
104
1-6
2014
Homo sapiens (Q9NVH6)
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