GONUTS has been updated to MW1.31 Most things seem to be working but be sure to report problems.
PMID:20212142
| Citation |
Dahms, SO, Hoefgen, S, Roeser, D, Schlott, B, Gührs, KH and Than, ME (2010) Structure and biochemical analysis of the heparin-induced E1 dimer of the amyloid precursor protein. Proc. Natl. Acad. Sci. U.S.A. 107:5381-6 |
|---|---|
| Abstract |
The amyloid precursor protein (APP) is the key player in Alzheimer's disease pathology, yet APP and its analogues are also essential for neuronal development and cell homeostasis in mammals. We have determined the crystal structure of the entire N-terminal APP-E1 domain consisting of the growth factor like and the copper binding domains at 2.7-A resolution and show that E1 functions as a rigid functional entity. The two subdomains interact tightly in a pH-dependent manner via an evolutionarily conserved interface area. Two E1 entities dimerize upon their interaction with heparin, requiring 8-12 sugar rings to form the heparin-bridged APP-E1 dimer in an endothermic and pH-dependent process that is characterized by a low micromolar dissociation constant. Limited proteolysis confirms that the heparin-bridged E1 dimers obtained in solution correspond to a dimer contact in our crystal, enabling us to model this heparin-[APP-E1](2) complex. Correspondingly, the APP-based signal transduction, cell-cell- and/or cell-ECM interaction should depend on dimerization induced by heparin, as well as on pH, arguing that APP could fulfill different functions depending on its (sub)cellular localization. |
| Links |
PubMed PMC2851805 Online version:10.1073/pnas.0911326107 |
| Keywords |
Amyloid beta-Protein Precursor/chemistry; Amyloid beta-Protein Precursor/metabolism; Biophysical Phenomena; Crystallography, X-Ray; Heparin; Humans; Hydrogen-Ion Concentration; In Vitro Techniques; Models, Molecular; Protein Interaction Domains and Motifs; Protein Multimerization; Protein Structure, Tertiary; Recombinant Proteins/chemistry; Recombinant Proteins/metabolism |
Significance
Annotations
| Gene product | Qualifier | GO Term | Evidence Code | with/from | Aspect | Extension | Notes | Status |
|---|---|---|---|---|---|---|---|---|
|
enables |
GO:0042802: identical protein binding |
ECO:0000353: physical interaction evidence used in manual assertion |
UniProtKB:P05067-4 |
F |
Seeded From UniProt |
complete | ||
Notes
See also
References
See Help:References for how to manage references in GONUTS.
