Histone deacetylase 2

[8] Generally, HDAC2 is considered a putative target for the treatment for a variety of diseases, due to its involvement in cell cycle progression.

The metallic ion facilitates the nucleophilic attack of the carbonyl group by a coordinated water molecule, leading to the formation of a tetrahedral intermediate.

This intermediate is momentarily stabilized by hydrogen bond interactions and metal coordination, until it ultimately collapses resulting in the deacetylation of the lysine residue.

[14] The HDAC2 active site consists of a lipophilic tube which leads from the surface to the catalytic center, and a 'foot pocket' containing mostly water molecules.

Thus, it plays an important role in transcriptional regulation, cell cycle progression and developmental events.

[18] Furthermore, a recent study found that inhibition of HDAC2 via c-Abl by tyrosine phosphorylation prevented cognitive and behavioral impairments in mice with Alzheimer's disease.

[19] The results of the study support the role of c-Abl and HDAC2 in the signaling pathway of gene expression in patients with Alzheimer's disease.

A recent study discovered decreased metastasis formation in mouse models that develop pancreatic cancer when the murine ortholog Hdac2 was genetically depleted.

This image shows the structure of the HDAC2 enzyme. The two consecutive benzene rings form the foot pocket, where as the single benzene rings forms the lipophilic tube.
The HDAC2 enzyme attacking a lysine residue.