Ligand regulation of a constitutively dimeric EGF receptor.
Ligand regulation of a constitutively dimeric EGF receptor.
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DOI:
10.1038/ncomms8380
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发表时间:
2015-06-10
影响因子:
16.6
通讯作者:
Lemmon, Mark A.
中科院分区:
文献类型:
--
作者:
Freed, Daniel M.;Alvarado, Diego;Lemmon, Mark A.
Ligand-induced receptor dimerization has traditionally been viewed as the key event in transmembrane signalling by epidermal growth factor receptors (EGFRs). Here we show that the Caenorhabditis elegans EGFR orthologue LET-23 is constitutively dimeric, yet responds to its ligand LIN-3 without changing oligomerization state. SAXS and mutational analyses further reveal that the preformed dimer of the LET-23 extracellular region is mediated by its domain II dimerization arm and resembles other EGFR extracellular dimers seen in structural studies. Binding of LIN-3 induces only minor structural rearrangements in the LET-23 dimer to promote signalling. Our results therefore argue that EGFR can be regulated by allosteric changes within an existing receptor dimer—resembling signalling by insulin receptor family members, which share similar extracellular domain compositions but form covalent dimers. Whereas epidermal growth factor-induced dimerization is considered essential for EGFR signalling, the structurally related insulin receptor is a disulfide-linked dimer. Here the authors show that C. elegans EGFR is constitutively dimeric and undergoes subtle structural changes upon ligand binding that likely underlie allosteric activation.
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影响因子:
16.8
作者:
通讯作者:
--
DOI:
10.1073/pnas.83.17.6258
发表时间:
1986-09-01
影响因子:
11.1
作者:
GRASBERGER, B;MINTON, AP;METZGER, H
通讯作者:
METZGER, H
影响因子:
11.8
作者:
Miura, GI;Buglino, J;Treisman, JE
通讯作者:
Treisman, JE
影响因子:
5.7
作者:
Dawson, Jessica P.;Bu, Zimei;Lemmon, Mark A.
通讯作者:
Lemmon, Mark A.
影响因子:
5.3
作者:
Lu, Chafen;Mi, Li-Zhi;Springer, Timothy A.
通讯作者:
Springer, Timothy A.