National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM139636
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
CA274502
米国
引用
ジャーナル: Elife / 年: 2024 タイトル: Structural dynamics of the active HER4 and HER2/HER4 complexes is finely tuned by different growth factors and glycosylation. 著者: Raphael Trenker / Devan Diwanji / Tanner Bingham / Kliment A Verba / Natalia Jura / 要旨: Human Epidermal growth factor Receptor 4 (HER4 or ERBB4) carries out essential functions in the development and maintenance of the cardiovascular and nervous systems. HER4 activation is regulated by ...Human Epidermal growth factor Receptor 4 (HER4 or ERBB4) carries out essential functions in the development and maintenance of the cardiovascular and nervous systems. HER4 activation is regulated by a diverse group of extracellular ligands including the neuregulin (NRG) family and betacellulin (BTC), which promote HER4 homodimerization or heterodimerization with other HER receptors. Important cardiovascular functions of HER4 are exerted via heterodimerization with its close homolog and orphan receptor, HER2. To date structural insights into ligand-mediated HER4 activation have been limited to crystallographic studies of HER4 ectodomain homodimers in complex with NRG1β. Here, we report cryo-EM structures of near full-length HER2/HER4 heterodimers and full-length HER4 homodimers bound to NRG1β and BTC. We show that the structures of the heterodimers bound to either ligand are nearly identical and that in both cases the HER2/HER4 heterodimer interface is less dynamic than those observed in structures of HER2/EGFR and HER2/HER3 heterodimers. In contrast, structures of full-length HER4 homodimers bound to NRG1β and BTC display more large-scale dynamics mirroring states previously reported for EGFR homodimers. Our structures also reveal the presence of multiple glycan modifications within HER4 ectodomains, modeled for the first time in HER receptors, that distinctively contribute to the stabilization of HER4 homodimer interfaces over those of HER2/HER4 heterodimers.
名称: Ternary complex of HER2/HER4/BTC / タイプ: COMPLEX 詳細: HER2 and HER4 Receptors were expressed in EXPI293F cells. The ligand BTC was expressed in E. coli Origami B (DE3) Entity ID: #1-#3 / 由来: MULTIPLE SOURCES
分子量
値: 0.284435 MDa / 実験値: NO
由来(天然)
生物種: Homo sapiens (ヒト)
由来(組換発現)
生物種: Homo sapiens (ヒト)
緩衝液
pH: 7.4
緩衝液成分
ID
濃度
名称
式
Buffer-ID
1
50mM
Tris
1
2
150mM
sodiumchloride
NaCl
1
3
0.5mM
DDM
1
試料
包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES
試料支持
グリッドのタイプ: Quantifoil R1.2/1.3
急速凍結
装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 293 K