5XO2

Crystal structure of human paired immunoglobulin-like type 2 receptor alpha with synthesized glycopeptide II

5XO2 の概要

• エントリーDOI: 10.2210/pdb5xo2/pdb
• 分子名称: Paired immunoglobulin-like type 2 receptor alpha, Peptide from Envelope glycoprotein B, N-acetyl-alpha-neuraminic acid-(2-6)-2-acetamido-2,4-dideoxy-alpha-D-xylo-hexopyranose, ... (4 entities in total)
• 機能のキーワード: membrane protein, immune receptor, viral entry inhibitor, glycopeptide, immune system
• 由来する生物種: Homo sapiens (Human); 詳細
• 細胞内の位置: Isoform 1: Cell membrane ; Single-pass type I membrane protein . Isoform 2: Cell membrane ; Single-pass type I membrane protein . Isoform 3: Secreted . Isoform 4: Secreted : Q9UKJ1; Virion membrane ; Single-pass type I membrane protein : P06437
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 30147.66

構造登録者

Furukawa, A.,Kakita, K.,Yamada, T.,Ishizuka, M.,Sakamoto, J.,Hatori, N.,Maeda, N.,Ohsaka, F.,Saitoh, T.,Nomura, T.,Kuroki, K.,Nambu, H.,Arase, H.,Matsunaga, S.,Anada, M.,Ose, T.,Hashimoto, S.,Maenaka, K. (登録日: 2017-05-25, 公開日: 2017-10-25, 最終更新日: 2024-11-13)

主引用文献

Furukawa, A.,Kakita, K.,Yamada, T.,Ishizuka, M.,Sakamoto, J.,Hatori, N.,Maeda, N.,Ohsaka, F.,Saitoh, T.,Nomura, T.,Kuroki, K.,Nambu, H.,Arase, H.,Matsunaga, S.,Anada, M.,Ose, T.,Hashimoto, S.,Maenaka, K.
Structural and thermodynamic analyses reveal critical features of glycopeptide recognition by the human PILR alpha immune cell receptor.
J. Biol. Chem., 292:21128-21136, 2017

PubMed Abstract: Before entering host cells, herpes simplex virus-1 uses its envelope glycoprotein B to bind paired immunoglobulin-like type 2 receptor α (PILRα) on immune cells. PILRα belongs to the Siglec (sialic acid (SA)-binding immunoglobulin-like lectin)-like family, members of which bind SA. PILRα is the only Siglec member to recognize not only the sialylated -linked sugar T antigen (sTn) but also its attached peptide region. We previously determined the crystal structure of PILRα complexed with the sTn-linked glycopeptide of glycoprotein B, revealing the simultaneous recognition of sTn and peptide by the receptor. However, the contribution of each glycopeptide component to PILRα binding was largely unclear. Here, we chemically synthesized glycopeptide derivatives and determined the thermodynamic parameters of their interaction with PILRα. We show that glycopeptides with different sugar units linking SA and peptides ( "GlcNAc-type" and "deoxy-GlcNAc-type" glycopeptides) have lower affinity and more enthalpy-driven binding than the wild type ( GalNAc-type glycopeptide). The crystal structures of PILRα complexed with these glycopeptides highlighted the importance of stereochemical positioning of the O4 atom of the sugar moiety. These results provide insights both for understanding the unique -glycosylated peptide recognition by the PILRα and for the rational design of herpes simplex virus-1 entry inhibitors.

PubMed: 29046357
DOI: 10.1074/jbc.M117.799239

実験手法

X-RAY DIFFRACTION (2.201 Å)