Architecture of Eph receptor clusters.Himanen, J.P., Yermekbayeva, L., Janes, P.W., Walker, J.R., Xu, K., Atapattu, L., Rajashankar, K.R., Mensinga, A., Lackmann, M., Nikolov, D.B., Dhe-Paganon, S.
(2010) Proc Natl Acad Sci U S A 107: 10860-10865
- PubMed: 20505120
- DOI: 10.1073/pnas.1004148107
- Primary Citation of Related Structures:
3MBW, 3MX0, 3C8X, 3FL7, 3CZU
- PubMed Abstract:
- Recruitment of Eph receptors into signaling clusters does not require ephrin contact.
Wimmer-Kleikamp, S.H., Janes, P.W., Squire, A., Bastiaens, P.I., Lackmann, M.
(2004) J Cell Biol 164: 661
- Distinct subdomains of the EphA3 receptor mediate ligand binding and receptor dimerization.
Lackmann, M., Oates, A.C., Dottori, M., Smith, F.M., Do, C., Power, M., Kravets, L., Boyd, A.W.
(1998) J Biol Chem 273: 20228
- Crystal structure of an Eph receptor-ephrin complex.
Himanen, J.P., Rajashankar, K.R., Lackmann, M., Cowan, C.A., Henkemeyer, M., Nikolov, D.B.
(2001) Nature 414: 933
Eph receptor tyrosine kinases and their ephrin ligands regulate cell navigation during normal and oncogenic development. Signaling of Ephs is initiated in a multistep process leading to the assembly of higher-order signaling clusters that set off bidirec ...
Eph receptor tyrosine kinases and their ephrin ligands regulate cell navigation during normal and oncogenic development. Signaling of Ephs is initiated in a multistep process leading to the assembly of higher-order signaling clusters that set off bidirectional signaling in interacting cells. However, the structural and mechanistic details of this assembly remained undefined. Here we present high-resolution structures of the complete EphA2 ectodomain and complexes with ephrin-A1 and A5 as the base unit of an Eph cluster. The structures reveal an elongated architecture with novel Eph/Eph interactions, both within and outside of the Eph ligand-binding domain, that suggest the molecular mechanism underlying Eph/ephrin clustering. Structure-function analysis, by using site-directed mutagenesis and cell-based signaling assays, confirms the importance of the identified oligomerization interfaces for Eph clustering.
Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA.