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CATH Superfamily 3.40.50.1460

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: waiting to be named.

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: Caspase-3 preproprotein

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
Caspase-3. [EC: 3.4.22.56]
Strict requirement for an Asp residue at positions P1 and P4. It has a preferred cleavage sequence of Asp-Xaa-Xaa-Asp-|- with a hydrophobic amino-acid residue at P2 and a hydrophilic amino-acid residue at P3, although Val or Ala are also accepted at this position.
  • Caspase-3 is an effector/executioner caspase, as are caspase-6 (EC 3.4.22.59) and caspase-7 (EC 3.4.22.60).
  • These caspases are responsible for the proteolysis of the majority of cellular polypeptides, (e.g. poly(ADP-ribose) polymerase (PARP)), which leads to the apoptotic phenotype.
  • Procaspase-3 can be activated by caspase-1 (EC 3.4.22.36), caspase-8 (EC 3.4.22.61), caspase-9 (EC 3.4.22.62) and caspase-10 (EC 3.4.22.63) as well as by the serine protease granzyme B.
  • Caspase-3 can activate procaspase-2 (EC 3.4.22.55).
  • Activation occurs by inter-domain cleavage followed by removal of the N-terminal prodomain.
  • While Asp-Glu-(Val/Ile)-Asp is thought to be the preferred cleavage sequence, the enzyme can accommodate different residues at P2 and P3 of the substrate.
  • Like caspase-2, a hydrophobic residue at P5 of caspase-3 leads to more efficient hydrolysis, e.g. (Val/Leu)-Asp-Val-Ala-Asp-|- is a better substrate than Asp-Val-Ala-Asp-|-.
  • This is not the case for caspase-7.
  • Belongs to peptidase family C14.
 21 A0A1U7Q288 A0A1U7Q288 A0A2R9A7H9 A0A2R9A7H9 A0A3Q7TW82 A0A3Q7TW82 K7D0A9 K7D0A9 P42574 P42574
(11 more...)
Caspase-6. [EC: 3.4.22.59]
Strict requirement for Asp at position P1 and has a preferred cleavage sequence of Val-Glu-His-Asp-|-.
  • Caspase-6 is an effector/executioner caspase, as are caspase-3 (EC 3.4.22.56) and caspase-7 (EC 3.4.22.60).
  • These caspases are responsible for the proteolysis of the majority of cellular polypeptides, (e.g. poly(ADP-ribose) polymerase (PARP)), which lead to the apoptotic phenotype.
  • Caspase-6 can cleave its prodomain to produce mature caspase-6, which directly activates caspase-8 (EC 3.4.22.61) and leads to cytochrome c release from the mitochondria; the release of cytochrome c, which is an essential component of the intrinsic apoptosis pathway.
  • Can also cleave and inactivate lamins, the intermediate filament scaffold proteins of the nuclear envelope, leading to nuclear fragementation in the final phases of apoptosis.
  • Belongs to peptidase family C14.
 7 O08738 O08738 O35397 P55212 Q3T0P5 Q3TPJ9 Q3TPJ9
Caspase-7. [EC: 3.4.22.60]
Strict requirement for an Asp residue at position P1 and has a preferred cleavage sequence of Asp-Glu-Val-Asp-|-.
  • Caspase-7 is an effector/executioner caspase, as are caspase-3 (EC 3.4.22.56) and caspase-6 (EC 3.4.22.59).
  • These caspases are responsible for the proteolysis of the majority of cellular polypeptides, (e.g. poly(ADP-ribose) polymerase (PARP)), which lead to the apoptotic phenotype.
  • Although a hydrophobic residue at P5 of caspase-2 (EC 3.4.22.55) and caspase-3 leads to more efficient hydrolysis, the amino-acid residue at this location in caspase-7 has no effect.
  • Caspase-7 is activated by the initiator caspases (caspase-8 (EC 3.4.22.61), caspase-9 (EC 3.4.22.62) and caspase-10 (EC 3.4.22.63)).
  • Removal of the N-terminal prodomain occurs before cleavage in the linker region between the large and small subunits.
  • Belongs to peptidase family C14.
 4 A0A1U7Q2E9 A0A1U7Q2E9 P55214 P55214