The human ACC2 CT-domain C-terminus is required for full functionality and has a novel twist.
Journal Article (Journal Article)
Inhibition of acetyl-CoA carboxylase (ACC) may prevent lipid-induced insulin resistance and type 2 diabetes, making the enzyme an attractive pharmaceutical target. Although the enzyme is highly conserved amongst animals, only the yeast enzyme structure is available for rational drug design. The use of biophysical assays has permitted the identification of a specific C-terminal truncation of the 826-residue human ACC2 carboxyl transferase (CT) domain that is both functionally competent to bind inhibitors and crystallizes in their presence. This C-terminal truncation led to the determination of the human ACC2 CT domain-CP-640186 complex crystal structure, which revealed distinctions from the yeast-enzyme complex. The human ACC2 CT-domain C-terminus is comprised of three intertwined alpha-helices that extend outwards from the enzyme on the opposite side to the ligand-binding site. Differences in the observed inhibitor conformation between the yeast and human structures are caused by differing residues in the binding pocket.
Full Text
Duke Authors
Cited Authors
- Madauss, KP; Burkhart, WA; Consler, TG; Cowan, DJ; Gottschalk, WK; Miller, AB; Short, SA; Tran, TB; Williams, SP
Published Date
- May 2009
Published In
Volume / Issue
- 65 / Pt 5
Start / End Page
- 449 - 461
PubMed ID
- 19390150
Pubmed Central ID
- 19390150
Electronic International Standard Serial Number (EISSN)
- 1399-0047
Digital Object Identifier (DOI)
- 10.1107/S0907444909008014
Language
- eng
Conference Location
- United States