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CATH Superfamily 3.60.20.10

Aminohydrolase, N-terminal nucleophile (Ntn) domain

The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Glutamine Phosphoribosylpyrophosphate, subunit 1, domain 1
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 1: Glutamate synthase, large subunit

There are 3 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Glutamate synthase (NADPH). [EC: 1.4.1.13]
2 L-glutamate + NADP(+) = L-glutamine + 2-oxoglutarate + NADPH.
  • The reaction takes place in the opposite direction.
  • The protein is composed of two subunits, alpha and beta.
  • The alpha subunit is composed of two domains, one hydrolyzing L-glutamine to NH(3) and L-glutamate (cf. EC 3.5.1.2), the other combining the produced NH(3) with 2-oxoglutarate to produce a second molecule of L-glutamate (cf. EC 1.4.1.4).
  • The beta subunit transfers electrons to the cosubstrate.
  • The NH(3) is channeled through a 31 A channel in the active protein.
  • In the absence of the beta subunit, coupling between the two domains of the alpha subunit is compromised and some ammonium can be produced.
  • In the intact alpha-beta complex, ammonia production only takes place as part of the overall reaction.
  • Formerly EC 2.6.1.53.
 77 A0A045GNB6 A0A045GNB6 A0A045GNB6 A0A045GNB6 A0A094WIN3 A0A094WIN3 A0A094WIN3 A0A094WIN3 A0A094WIN3 A0A094WIN3
(67 more...)
Glutamate synthase (ferredoxin). [EC: 1.4.7.1]
2 L-glutamate + 2 oxidized ferredoxin = L-glutamine + 2-oxoglutarate + 2 reduced ferredoxin + 2 H(+).
  • The protein is composed of two domains, one hydrolyzing L-glutamine to NH(3) and L-glutamate (cf. EC 3.5.1.2), the other combining the produced NH(3) with 2-oxoglutarate to produce a second molecule of L-glutamate.
  • The NH(3) is channeled through a 24 A channel in the active protein.
  • No hydrolysis of glutamine takes place without ferredoxin and 2-oxoglutarate being bound to the protein.
 10 A0A178UNU3 A0A178UNU3 P23225 P55037 P55038 Q43155 Q69RJ0 Q9T0P4 Q9ZNZ7 Q9ZNZ7
Glutamate synthase (NADH). [EC: 1.4.1.14]
2 L-glutamate + NAD(+) = L-glutamine + 2-oxoglutarate + NADH.
  • A flavoprotein (FMN).
  • The reaction takes place in the direction of L-glutamate production.
  • The protein is composed of two domains, one hydrolyzing L-glutamine to NH(3) and L-glutamate (cf. EC 3.5.1.2), the other combining the produced NH(3) with 2-oxoglutarate to produce a second molecule of L-glutamate (cf. EC 1.4.1.2).
 9 G2WBZ3 G2WBZ3 G2WBZ3 N1P7N3 N1P7N3 N1P7N3 Q12680 Q12680 Q12680
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