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CATH Superfamily 3.90.470.20

4'-phosphopantetheinyl transferase domain

The name of this superfamily has been modified since the most recent official CATH+ release (v4_4_0). At the point of the last release, this superfamily was named:

"
4'-phosphopantetheinyl transferase domain
".

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 45: Phosphopantetheinyl transferase PptB

There are 1 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
Holo-[acyl-carrier-protein] synthase. [EC: 2.7.8.7]
CoA-(4'-phosphopantetheine) + apo-[acyl-carrier-protein] = adenosine 3',5'-bisphosphate + holo-[acyl-carrier-protein].
  • All polyketide synthases, fatty-acid synthases and non-ribosomal peptide synthases require post-translational modification of their constituent acyl-carrier-protein (ACP) domains to become catalytically active.
  • The inactive apo-proteins are converted into their active holo-forms by transfer of the 4'-phosphopantetheinyl moiety of CoA to the sidechain hydroxy group of a conserved serine residue in each ACP domain.
  • The enzyme from human can activate both the ACP domain of the human cytosolic multifunctional fatty acid synthase system (EC 2.3.1.85) and that associated with human mitochondria as well as peptidyl- carrier and acyl-carrier-proteins from prokaryotes.
  • Removal of the 4-phosphopantetheinyl moiety from holo-ACP is carried out by EC 3.1.4.14.
 4 B0YEF2 B0YEF2 Q4W9R0 Q4W9R0
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