1GQ5

Structural Determinants of the NHERF Interaction with beta2-AR and PDGFR

1GQ5 の概要

• エントリーDOI: 10.2210/pdb1gq5/pdb
• 関連するPDBエントリー: 1G9O 1GQ5 1I92 1LWP
• 分子名称: EZRIN-RADIXIN-MOESIN BINDING PHOSPHOPROTEIN-50, CHLORIDE ION (3 entities in total)
• 機能のキーワード: signaling protein, pdz, beta2-adrenergic receptor, pdgfr, nherf, complex
• 由来する生物種: HOMO SAPIENS (HUMAN)
• 細胞内の位置: Membrane; Single-pass type I membrane protein: P09619
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 10019.29

構造登録者

Karthikeyan, S.,Leung, T.,Ladias, J.A.A. (登録日: 2001-11-20, 公開日: 2002-11-14, 最終更新日: 2023-12-13)

主引用文献

Karthikeyan, S.,Leung, T.,Ladias, J.A.A.
Structural Determinants of the Na+/H+ Exchanger Regulatory Factor Interaction with the Beta 2 Adrenergic and Platelet-Derived Growth Factor Receptors
J.Biol.Chem., 277:18973-, 2002

PubMed Abstract: The Na(+)/H(+) exchanger regulatory factor (NHERF) binds through its PDZ1 domain to the carboxyl-terminal sequences NDSLL and EDSFL of the beta(2) adrenergic receptor (beta(2)AR) and platelet-derived growth factor receptor, respectively, and plays a critical role in the membrane localization and physiological regulation of these receptors. The crystal structures of the human NHERF PDZ1 domain bound to the sequences NDSLL and EDSFL have been determined at 1.9- and 2.2-A resolution, respectively. The beta(2)AR and platelet-derived growth factor receptor ligands insert into the PDZ1 binding pocket by a beta-sheet augmentation process and are stabilized by largely similar networks of hydrogen bonds and hydrophobic contacts. In the PDZ1-beta(2)AR complex, the side chain of asparagine at position -4 in the beta(2)AR peptide forms two additional hydrogen bonds with Gly(30) of PDZ1, which contribute to the higher affinity of this interaction. Remarkably, both complexes are further stabilized by hydrophobic interactions involving the side chains of the penultimate amino acids of the peptide ligands, whereas the PDZ1 residues Asn(22) and Glu(43) undergo conformational changes to accommodate these side chains. These results provide structural insights into the mechanisms by which different side chains at the position -1 of peptide ligands interact with PDZ domains and contribute to the affinity of the PDZ-ligand interaction.

PubMed: 11882663
DOI: 10.1074/JBC.M201507200

実験手法

X-RAY DIFFRACTION (2.2 Å)