HAD-superfamily hydrolase, subfamily IG, 5'-nucleotidase

Definition

This family includes a 5'-nucleotidase, [ec:3.1.3.5], specific for purines (IMP and GMP) PMID:9371705. These enzymes are members of the Haloacid Dehalogenase (HAD) superfamily. HAD members are recognised by three short motifs {hhhhDxDx(T/V)}, {hhhh(T/S)}, and either {hhhh(D/E)(D/E)x(3-4)(G/N)} or {hhhh(G/N)(D/E)x(3-4)(D/E)} (where "h" stands for a hydrophobic residue). Crystal structures of many HAD enzymes has verified PSI-PRED predictions of secondary structural elements which show each of the "hhhh" sequences of the motifs as part of β sheets. This subfamily of enzymes is part of "Subfamily I" of the HAD superfamily by virtue of a "cap" domain in between motifs 1 and 2. This subfamily's cap domain has a different predicted secondary structure than all other known HAD enzymes and thus has been designated "subfamily IG", the domain appears to consist of a mixed α/β fold.

5 human proteins with this domain

Each is a reviewed human protein in the Seroatlas serome and a potential autoantibody target; this domain groups them into one antibody-relevant category. Every entry links to its own record.

Download CSV (5 proteins: gene, accession, name)

• NT5C2
• NT5DC1
• NT5DC2
• NT5DC3
• NT5DC4