Crystal structure of truncated human apolipoprotein A-I suggests a lipid-bound conformation.Borhani, D.W., Rogers, D.P., Engler, J.A., Brouillette, C.G.
(1997) Proc.Natl.Acad.Sci.USA 94: 12291-12296
- PubMed: 9356442
- PubMed Abstract:
- Truncation of the Amino Terminus of Human Apolipoprotein A-I Substantially Alters Only the Lipid-Free Conformation
Rogers, D.P.,Brouillette, C.G.,Engler, J.A.,Tendian, S.W.,Roberts, L.,Mishra, V.K.,Anantharamaiah, G.M.,Lund-Katz, S.,Phillips, M.C.,Ray, M.J.
(1997) Biochemistry 36: 288
- Structural Models of Human Apolipoprotein A-I
Brouillette, C.G.,Anantharamaiah, G.M.
(1995) Biochim.Biophys.Acta 1256: 103
- Structural Analysis of Apolipoprotein A-I: Limited Proteolysis of Methionine-Reduced and-Oxidized Lipid-Free and Lipid-Bound Human Apo A-I
Roberts, L.M.,Ray, M.J.,Shih, T.W.,Hayden, E.,Reader, M.M.,Brouillette, C.G.
(1997) Biochemistry 36: 7615
The structure of truncated human apolipoprotein A-I (apo A-I), the major protein component of high density lipoprotein, has been determined at 4-A resolution. The crystals comprise residues 44-243 (exon 4) of apo A-I, a fragment that binds to lipid s ...
The structure of truncated human apolipoprotein A-I (apo A-I), the major protein component of high density lipoprotein, has been determined at 4-A resolution. The crystals comprise residues 44-243 (exon 4) of apo A-I, a fragment that binds to lipid similarly to intact apo A-I and that retains the lipid-bound conformation even in the absence of lipid. The molecule consists almost entirely of a pseudo-continuous, amphipathic alpha-helix that is punctuated by kinks at regularly spaced proline residues; it adopts a shape similar to a horseshoe of dimensions 125 x 80 x 40 A. Four molecules in the asymmetric unit associate via their hydrophobic faces to form an antiparallel four-helix bundle with an elliptical ring shape. Based on this structure, we propose a model for the structure of apo A-I bound to high density lipoprotein.
Department of Organic Chemistry, Southern Research Institute, Birmingham, AL 35205, USA. email@example.com