The name of this superfamily has been modified since the most recent official CATH+ release (v4_2_0). At the point of the last release, this superfamily was named:

Glucose-6-phosphate isomerase like protein; 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 21123: Glutamine--fructose-6-phosphate aminotransferase [...

There are 6 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
Glutamine--fructose-6-phosphate transaminase (isomerizing). [EC:]
L-glutamine + D-fructose 6-phosphate = L-glutamate + D-glucosamine 6-phosphate.
  • Although the overall reaction is that of a transferase, the mechanism involves the formation of ketimine between fructose 6-phosphate and a 6-amino group from a lysine residue at the active site, which is subsequently displaced by ammonia (transamidination).
  • Formerly EC
29688 A0A009EQH6 A0A009EQH6 A0A009G785 A0A009G785 A0A009GIF4 A0A009GIF4 A0A009GYE2 A0A009GYE2 A0A009IUJ0 A0A009IUJ0
(29678 more...)
H(+)-transporting two-sector ATPase. [EC:]
ATP + H(2)O + H(+)(In) = ADP + phosphate + H(+)(Out).
  • A multisubunit non-phosphorylated ATPase that is involved in the transport of ions.
  • Large enzymes of mitochondria, chloroplasts and bacteria with a membrane sector (F(o), V(o), A(o)) and a cytoplasmic-compartment sector (F(1), V(1), A(1)).
  • The F-type enzymes of the inner mitochondrial and thylakoid membranes act as ATP synthases.
  • All of the enzymes included here operate in a rotational mode, where the extramembrane sector (containing 3 alpha- and 3 beta-subunits) is connected via the delta-subunit to the membrane sector by several smaller subunits.
  • Within this complex, the gamma- and epsilon-subunits, as well as the 9-12 c subunits rotate by consecutive 120 degree angles and perform parts of ATP synthesis.
  • This movement is driven by the H(+) electrochemical potential gradient.
  • The V-type (in vacuoles and clathrin-coated vesicles) and A-type (archaeal) enzymes have a similar structure but, under physiological conditions, they pump H(+) rather than synthesize ATP.
  • Formerly EC
4 A0A1A9UKK3 A0A1A9UKK3 A0A1B0C1Q0 A0A1B0C1Q0
DNA helicase. [EC:]
ATP + H(2)O = ADP + phosphate.
  • DNA helicases utilize the energy from ATP hydrolysis to unwind double-stranded DNA.
  • Some of them unwind duplex DNA with a 3' to 5' polarity (1,3,5,8), other show 5' to 3' polarity (10,11,12,13) or unwind DNA in both directions (14,15).
  • Some helicases unwind DNA as well as RNA (4,9).
  • May be identical with EC (RNA helicase).
2 A0A0K3C8F4 A0A0K3C8F4
Riboflavin synthase. [EC:]
2 6,7-dimethyl-8-(1-D-ribityl)lumazine = riboflavin + 4-(1-D- ribitylamino)-5-amino-2,6-dihydroxypyrimidine.
    2 A0A0F4YVP2 A0A0F4YVP2
    Histone-lysine N-methyltransferase. [EC:]
    S-adenosyl-L-methionine + L-lysine-[histone] = S-adenosyl-L-homocysteine + N(6)-methyl-L-lysine-[histone].
      2 A0A0L1HSJ6 A0A0L1HSJ6
      Amidophosphoribosyltransferase. [EC:]
      5-phospho-beta-D-ribosylamine + diphosphate + L-glutamate = L-glutamine + 5-phospho-alpha-D-ribose 1-diphosphate + H(2)O.
        2 B7Q3U2 B7Q3U2