View in Gene3D

CATH Superfamily 1.10.1670.10

Helix-hairpin-Helix base-excision DNA repair enzymes (C-terminal)

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:

"
Helix-hairpin-Helix base-excision DNA repair enzymes (C-terminal)
".

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.
« Back to all FunFams

FunFam 2: Adenine DNA glycosylase

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
Adenine glycosylase. [EC: 3.2.2.31]
Hydrolyzes free adenine bases from 7,8-dihydro-8-oxoguanine:adenine mismatched double-stranded DNA, leaving an apurinic site.
  • The enzyme serves as a mismatch repair enzyme that works to correct 7,8-dihydro-8-oxoguanine:adenine mispairs that arise in DNA when error-prone synthesis occurs past 7,8-dihydro-8-oxoguanine (GO) lesions in DNA.
  • The enzyme excises the adenine of the mispair, producing an apurinic site sensitive to AP endonuclease activity.
  • After removing the undamaged adenine the enzyme remains bound to the site to prevent EC 3.2.2.23 (MutM) from removing the GO lesion, which could lead to a double strand break.
  • In vitro the enzyme is also active with adenine:guanine, adenine:cytosine, and adenine:7,8-dihydro-8-oxoadenine (AO) mispairs, removing the adenine in all cases.
 1542 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2 A0A028ADB2
(1532 more...)