2d3x

Theoretical Model: The protein structure described on this page was determined theoretically, and hence should be interpreted with caution.

THREE-DIMENSIONAL HOMOLOGY MODEL OF HUNTINGTIN RESIDUES 201- 327THREE-DIMENSIONAL HOMOLOGY MODEL OF HUNTINGTIN RESIDUES 201- 327

Structural highlights For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, PDBsum, ProSAT Publication Abstract from PubMed We have identified a domain in the N terminus of huntingtin that binds to membranes. A three-dimensional homology model of the structure of the binding domain predicts helical HEAT repeats, which emanate a positive electrostatic potential, consistent with a charge-based mechanism for membrane association. An amphipathic helix capable of inserting into pure lipid bilayers may serve to anchor huntingtin to the membrane. In cells, N-terminal huntingtin fragments targeted to regions of plasma membrane enriched in phosphatidylinositol 4,5-bisphosphate, receptor bound-transferrin, and endogenous huntingtin. N-terminal huntingtin fragments with an expanded polyglutamine tract aberrantly localized to intracellular regions instead of plasma membrane. Our data support a new model in which huntingtin directly binds membranes through electrostatic interactions with acidic phospholipids. Huntingtin associates with acidic phospholipids at the plasma membrane.,Kegel KB, Sapp E, Yoder J, Cuiffo B, Sobin L, Kim YJ, Qin ZH, Hayden MR, Aronin N, Scott DL, Isenberg G, Goldmann WH, DiFiglia M J Biol Chem. 2005 Oct 28;280(43):36464-73. Epub 2005 Aug 5. PMID:16085648 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 2d3x Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image