title: On the function of the internal cavity of histone deacetylase protein 8: R37 is a crucial residue for catalysis.
abstract: Biochemical studies reveal that a conserved arginine residue (R37) at the centre of the 14Å internal cavity of histone deacetylase (HDAC) 8 is important for catalysis and acetate affinity. Computational studies indicate that R37 forms multiple hydrogen bonding interactions with the backbone carbonyl oxygen atoms of two conserved glycine residues, G303 and G305, resulting in a 'closed' form of the channel. One possible rationale for these data is that water or product (acetate) transit through the catalytically crucial internal channel of HDAC8 is regulated by a gating interaction between G139 and G303 tethered in position by the conserved R37.
authors.affiliation: Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK.
authors.forename: Shozeb
authors.initials: S
authors.lastname: Haider
authors.forename: Caleb G
authors.initials: CG
authors.lastname: Joseph
authors.forename: Stephen
authors.initials: S
authors.lastname: Neidle
authors.forename: Carol A
authors.initials: CA
authors.lastname: Fierke
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Fuchter
mesh_terms: D055162:Biocatalysis; D018360:Crystallography, X-Ray; D006655:Histone Deacetylases / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D008958:Models, Molecular; D012097:Repressor Proteins / Q000737:chemistry / Q000378:metabolism*
chemical_list: D012097:Repressor Proteins; C409470:HDAC8 protein, human; D006655:Histone Deacetylases