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Information on EC 2.3.2.26 - HECT-type E3 ubiquitin transferase

for references in articles please use BRENDA:EC2.3.2.26
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EC Tree
     2 Transferases
         2.3 Acyltransferases
             2.3.2 Aminoacyltransferases
                2.3.2.26 HECT-type E3 ubiquitin transferase
IUBMB Comments
In the first step the enzyme transfers ubiquitin from the E2 ubiquitin-conjugating enzyme (EC 2.3.2.23) to a cysteine residue in its HECT domain (which is located in the C-terminal region), forming a thioester bond. In a subsequent step the enzyme transfers the ubiquitin to an acceptor protein, resulting in the formation of an isopeptide bond between the C-terminal glycine residue of ubiquitin and the epsilon-amino group of an L-lysine residue of the acceptor protein. cf. EC 2.3.2.27, RING-type E3 ubiquitin transferase and EC 2.3.2.31, RBR-type E3 ubiquitin transferase.
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Word Map
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria, Archaea
Reaction Schemes
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[E2 ubiquitin-conjugating enzyme]-S-ubiquitinyl-L-cysteine
+
[acceptor protein]-L-lysine
=
[E2 ubiquitin-conjugating enzyme]-L-cysteine
+
[acceptor protein]-N6-ubiquitinyl-L-lysine
Synonyms
nedd4, smurf1, smurf2, huwe1, nedd4l, nedd4-1, e6-ap, ube3c, trp120, trip12, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
[E2 ubiquitin-conjugating enzyme]-S-ubiquitinyl-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-N6-ubiquitinyl-L-lysine
show the reaction diagram
[E2 ubiquitin-conjugating enzyme]-S-ubiquitinyl-L-cysteine + [HECT-type E3 ubiquitin transferase]-L-cysteine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + [HECT-type E3 ubiquitin transferase]-S-ubiquitinyl-L-cysteine
show the reaction diagram
(1a)
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[HECT-type E3 ubiquitin transferase]-S-ubiquitinyl-L-cysteine + [acceptor protein]-L-lysine = [HECT-type E3 ubiquitin transferase]-L-cysteine + [acceptor protein]-N6-ubiquitinyl-L-lysine
show the reaction diagram
(1b)
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-
PATHWAY SOURCE
PATHWAYS
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