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Information on EC 2.6.1.42 - branched-chain-amino-acid transaminase and Organism(s) Saccharomyces cerevisiae and UniProt Accession P47176

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EC Tree
     2 Transferases
         2.6 Transferring nitrogenous groups
             2.6.1 Transaminases
                2.6.1.42 branched-chain-amino-acid transaminase
IUBMB Comments
Also acts on L-isoleucine and L-valine, and thereby differs from EC 2.6.1.6, leucine transaminase, which does not. It also differs from EC 2.6.1.66, valine---pyruvate transaminase.
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Saccharomyces cerevisiae
UNIPROT: P47176
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Word Map
The taxonomic range for the selected organisms is: Saccharomyces cerevisiae
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota, Archaea
Synonyms
bcat1, bcatm, branched-chain aminotransferase, bcatc, bcat2, branched-chain amino acid aminotransferase, branched chain aminotransferase, hbcat, hbcatm, branched-chain amino acid transaminase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
branched-chain amino acid aminotransferase
-
branched-chain amino acid transaminase
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branched-chain amino acid aminotransferase
branched-chain amino acid transaminase
branched-chain amino acid-glutamate transaminase
-
-
-
-
branched-chain aminotransferase
-
-
-
-
glutamate-branched-chain amino acid transaminase
-
-
-
-
L-branched chain amino acid aminotransferase
-
-
-
-
transaminase B
-
-
-
-
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
amino group transfer
-
-
-
-
SYSTEMATIC NAME
IUBMB Comments
branched-chain-amino-acid:2-oxoglutarate aminotransferase
Also acts on L-isoleucine and L-valine, and thereby differs from EC 2.6.1.6, leucine transaminase, which does not. It also differs from EC 2.6.1.66, valine---pyruvate transaminase.
CAS REGISTRY NUMBER
COMMENTARY hide
9054-65-3
-
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
L-isoleucine + 2-oxoglutarate
3-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
-
-
-
r
L-leucine + 2-oxoglutarate
4-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-valine + 2-oxoglutarate
3-methyl-2-oxobutanoate + L-glutamate
show the reaction diagram
L-isoleucine + 2-oxoglutarate
3-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-leucine + 2-oxo-3-methylpentanoate
2-oxoisohexanoate + L-isoleucine
show the reaction diagram
-
-
-
r
L-leucine + 2-oxoglutarate
4-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-leucine + 2-oxoisohexanoate
2-oxoisohexanoate + L-leucine
show the reaction diagram
-
-
-
r
L-leucine + 3-methyl-2-oxobutanoate
4-methyl-2-oxopentanoate + L-valine
show the reaction diagram
-
-
-
r
L-leucine + pyruvate
2-oxoisohexanoate + L-alanine
show the reaction diagram
-
-
-
r
L-valine + 2-oxoglutarate
3-methyl-2-oxobutanoate + L-glutamate
show the reaction diagram
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
L-isoleucine + 2-oxoglutarate
3-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
-
-
-
r
L-leucine + 2-oxoglutarate
4-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-valine + 2-oxoglutarate
3-methyl-2-oxobutanoate + L-glutamate
show the reaction diagram
L-isoleucine + 2-oxoglutarate
3-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-leucine + 2-oxoglutarate
4-methyl-2-oxopentanoate + L-glutamate
show the reaction diagram
L-valine + 2-oxoglutarate
3-methyl-2-oxobutanoate + L-glutamate
show the reaction diagram
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
pyridoxal 5'-phosphate
pyridoxal 5'-phosphate
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
additional information
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
malfunction
metabolism
physiological function
malfunction
metabolism
physiological function
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
K202A
site-directed mutagenesis, inactive mutant
A234D
site-directed mutagenesis of strain BY4741, both deletion mutant bat1DELTA and point mutant bat1A234D cells exhibit the same phenotypes relative to the wild-type Bat1 strain, namely, a repressive growth rate in the logarithmic phase, decreases in intracellular valine and leucine content in the logarithmic and stationary growth phases, respectively, and an increase in fusel alcohol content in culture medium, and a decrease in the carbon dioxide productivity. These results indicate that amino acid change from Ala to Asp at position 234 leads to a functional impairment of Bat1, although homology modeling suggests that Asp234 in the variant Bat1 does not inhibit enzymatic activity directly
K219A
K219R
-
mutation in conserved pyridoxal phosphate-binding site, loss of activity. Mutant is nearly as effective aswild-type Bat1 or Bat2 at partially suppressing the rapamycin recovery and TORC1 activity defects of the Bat1 bat2 mutant
additional information
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
gene BAT2, overexpression in Saccharomyces cerevisiae taz1DELTA mutant strain
expressed in the industrial wine yeast strain Saccharomyces cerevisiae VIN13
-
gene BAT1, overexpression in Saccharomyces cerevisiae taz1DELTA mutant strain
recombinant expression of C-terminally GFP-tagged wild-type Bat1 and A234D mutant Bat1 in the Bat1-deletion strain
APPLICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
synthesis
isobutanol and other branched-chain higher alcohols (BCHAs) are promising advanced biofuels derived from the degradation of branched-chain amino acids (BCAAs). The yeast Saccharomyces cerevisiae is a particularly attractive host for the production of BCHAs due to its high tolerance to alcohols and prevalent use in the bioethanol industry. Degradation of BCAAs begins with transamination reactions, catalyzed by branched-chain amino acid transaminases (BCATs) located in the mitochondria (Bat1p) and cytosol (Bat2p)
nutrition
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influences aroma and flavour compound formation and the sensory characteristics of wines and distillates
synthesis
isobutanol and other branched-chain higher alcohols (BCHAs) are promising advanced biofuels derived from the degradation of branched-chain amino acids (BCAAs). The yeast Saccharomyces cerevisiae is a particularly attractive host for the production of BCHAs due to its high tolerance to alcohols and prevalent use in the bioethanol industry. Degradation of BCAAs begins with transamination reactions, catalyzed by branched-chain amino acid transaminases (BCATs) located in the mitochondria (Bat1p) and cytosol (Bat2p)
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Kispal, G.; Steiner, H.; Court, D.A.; Rolinski, B.; Lill, R.
Mitochondrial and cytosolic branched-chain amino acid transaminases from yeast, homologs of the myc oncogene-regulated Eca39 protein
J. Biol. Chem.
271
24458-24464
1996
Saccharomyces cerevisiae (P38891), Saccharomyces cerevisiae (P47176), Saccharomyces cerevisiae
Manually annotated by BRENDA team
Eden, A.; Van Nedervelde, L.; Drukker, M.; Benvenisty, N.; Debourg, A.
Involvement of branched-chain amino acid aminotransferases in the production of fusel alcohols during fermentation in yeast
Appl. Microbiol. Biotechnol.
55
296-300
2001
Saccharomyces cerevisiae, Saccharomyces cerevisiae (P47176)
Manually annotated by BRENDA team
Lin, H.M.; Kaneshige, M.; Zhao, L.; Zhang, X.; Hanover, J.A.; Cheng, S.Y.
An isoform of branched-chain aminotransferase is a novel co-repressor for thyroid hormone nuclear receptors
J. Biol. Chem.
276
48196-48205
2001
Homo sapiens, Homo sapiens (O15382), Saccharomyces cerevisiae (P47176), Saccharomyces cerevisiae
Manually annotated by BRENDA team
Lilly, M.; Bauer, F.F.; Styger, G.; Lambrechts, M.G.; Pretorius, I.S.
The effect of increased branched-chain amino acid transaminase activity in yeast on the production of higher alcohols and on the flavour profiles of wine and distillates
FEMS Yeast Res.
6
726-743
2006
Saccharomyces cerevisiae, Saccharomyces cerevisiae BY4742
Manually annotated by BRENDA team
Kingsbury, J.M.; Sen, N.D.; Cardenas, M.E.
Branched-chain aminotransferases control TORC1 signaling in Saccharomyces cerevisiae
PLoS Genet.
11
e1005714
2015
Saccharomyces cerevisiae
Manually annotated by BRENDA team
Koonthongkaew, J.; Toyokawa, Y.; Ohashi, M.; Large, C.R.L.; Dunham, M.J.; Takagi, H.
Effect of the Ala234Asp replacement in mitochondrial branched-chain amino acid aminotransferase on the production of BCAAs and fusel alcohols in yeast
Appl. Microbiol. Biotechnol.
104
7915-7925
2020
Saccharomyces cerevisiae (P38891), Saccharomyces cerevisiae, Saccharomyces cerevisiae ATCC 204508 (P38891)
Manually annotated by BRENDA team
Antunes, D.; Chowdhury, A.; Aich, A.; Saladi, S.; Harpaz, N.; Stahl, M.; Schuldiner, M.; Herrmann, J.M.; Rehling, P.; Rapaport, D.
Overexpression of branched-chain amino acid aminotransferases rescues the growth defects of cells lacking the Barth syndrome-related gene TAZ1
J. Mol. Med.
97
269-279
2019
Saccharomyces cerevisiae (P38891), Saccharomyces cerevisiae (P47176), Saccharomyces cerevisiae, Saccharomyces cerevisiae ATCC 204508 (P38891), Saccharomyces cerevisiae ATCC 204508 (P47176)
Manually annotated by BRENDA team
Hammer, S.K.; Avalos, J.L.
Uncovering the role of branched-chain amino acid transaminases in Saccharomyces cerevisiae isobutanol biosynthesis
Metab. Eng.
44
302-312
2017
Saccharomyces cerevisiae (P38891), Saccharomyces cerevisiae (P47176), Saccharomyces cerevisiae ATCC 204508 (P38891), Saccharomyces cerevisiae ATCC 204508 (P47176)
Manually annotated by BRENDA team
Takpho, N.; Watanabe, D.; Takagi, H.
Valine biosynthesis in Saccharomyces cerevisiae is regulated by the mitochondrial branched-chain amino acid aminotransferase Bat1
Microb. Cell
5
293-299
2018
Saccharomyces cerevisiae (P38891), Saccharomyces cerevisiae (P47176), Saccharomyces cerevisiae
Manually annotated by BRENDA team