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CATH Superfamily 3.30.470.30

DNA ligase/mRNA capping enzyme

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:

"
DNA ligase/mRNA capping enzyme
".

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 6: Cap methyltransferase 1

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
Methyltransferase cap1. [EC: 2.1.1.57]
S-adenosyl-L-methionine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)- (purine-ribonucleotide)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)- methyl 5'-triphosphoguanosine)-(2'-O-methyl-purine-ribonucleotide)- [mRNA].
  • This enzyme catalyzes the methylation of the ribose on the first transcribed nucleotide of mRNA or snRNA molecules, which may be either guanosine or adenosine.
  • This methylation event is known as cap1, and occurs in all mRNAs and snRNAs of higher eukaryotes, including insects, vertebrates and their viruses.
  • The human enzyme can also methylate mRNA molecules that lack methylation on the capping 5'-triphosphoguanosine.
  • Formerly EC 2.1.1.58.
 42 A0A2J8Y3Q8 A0A2J8Y3Q8 A0A2J8Y3Q8 A0A2J8Y3Q8 A0A2J8Y3Q8 A0A2J8Y3Q8 A0A2R9B885 A0A2R9B885 A0A2R9B885 A0A2R9B885
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