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Information on EC 6.3.5.13 - lipid II isoglutaminyl synthase (glutamine-hydrolysing)

for references in articles please use BRENDA:EC6.3.5.13
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EC Tree
IUBMB Comments
The enzyme complex, found in Gram-positive bacteria, consists of two subunits. A glutaminase subunit (cf. EC 3.5.1.2, glutaminase) produces an ammonia molecule that is channeled to a ligase subunit, which adds it to the activated D-glutamate residue of lipid II, converting it to an isoglutamine residue.
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Word Map
The expected taxonomic range for this enzyme is: Bacteria, Archaea
Synonyms
gatd/murt, sa1707, sa1708, murt/gatd complex, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
ATP + beta-D-GlcNAc-(1->4)-Mur2Ac(oyl-L-Ala-gamma-D-Glu-L-Lys-D-Ala-D-Ala)-diphospho-ditrans,octacis-undecaprenol + L-glutamine + H2O = ADP + phosphate + beta-D-GlcNAc-(1->4)-MurNAc-L-Ala-D-isoglutaminyl-L-Lys-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenol + L-glutamate
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overall reaction
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ATP + beta-D-GlcNAc-(1->4)-Mur2Ac(oyl-L-Ala-gamma-D-Glu-L-Lys-D-Ala-D-Ala)-diphospho-ditrans,octacis-undecaprenol = ADP + beta-D-GlcNAc-(1->4)-MurNAc-L-Ala-gamma-D-O-P-Glu-L-Lys-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenol
show the reaction diagram
(1b)
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beta-D-GlcNAc-(1->4)-Mur2Ac(oyl-L-Ala-gamma-D-O-P-Glu-L-Lys-D-Ala-D-Ala)-diphospho-ditrans,octacis-undecaprenol + NH3 = beta-D-GlcNAc-(1->4)-MurNAc-L-Ala-D-isoglutaminyl-L-Lys-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenol + phosphate
show the reaction diagram
(1c)
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L-glutamine + H2O = L-glutamate + NH3
show the reaction diagram
(1a)
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