2L87

The 27-residue N-terminus CCR5-peptide in a ternary complex with HIV-1 gp120 and a CD4-mimic peptide

2L87 の概要

• エントリーDOI: 10.2210/pdb2l87/pdb
• NMR情報: BMRB: 17395
• 分子名称: C-C chemokine receptor type 5 (1 entity in total)
• 機能のキーワード: helix, hiv co-receptor, signaling protein
• 由来する生物種: Homo sapiens (Human)
• 細胞内の位置: Cell membrane; Multi-pass membrane protein: P51681
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 3357.65

構造登録者

Schnur, E.,Noah, E.,Ayzenshtat, I.,Sargsyan, H.,Inui, T.,Ding, F.X.,Arshava, B.,Sagi, Y.,Kessler, N.,Levy, R.,Scherf, T.,Naider, F.,Anglister, J. (登録日: 2011-01-06, 公開日: 2011-07-27, 最終更新日: 2024-11-06)

主引用文献

Schnur, E.,Noah, E.,Ayzenshtat, I.,Sargsyan, H.,Inui, T.,Ding, F.X.,Arshava, B.,Sagi, Y.,Kessler, N.,Levy, R.,Scherf, T.,Naider, F.,Anglister, J.
The Conformation and Orientation of a 27-Residue CCR5 Peptide in a Ternary Complex with HIV-1 gp120 and a CD4-Mimic Peptide.
J.Mol.Biol., 410:778-797, 2011

PubMed Abstract: Interaction of CC chemokine receptor 5 (CCR5) with the human immunodeficiency virus type 1 (HIV-1) gp120/CD4 complex involves its amino-terminal domain (Nt-CCR5) and requires sulfation of two to four tyrosine residues in Nt-CCR5. The conformation of a 27-residue Nt-CCR5 peptide, sulfated at Y10 and Y14, was studied both in its free form and in a ternary complex with deglycosylated gp120 and a CD4-mimic peptide. NMR experiments revealed a helical conformation at the center of Nt-CCR5(1-27), which is induced upon gp120 binding, as well as a helical propensity for the free peptide. A well-defined structure for the bound peptide was determined for residues 7-23, increasing by 2-fold the length of Nt-CCR5's known structure. Two-dimensional saturation transfer experiments and measurement of relaxation times highlighted Nt-CCR5 residues Y3, V5, P8-T16, E18, I23 and possibly D2 as the main binding determinant. A calculated docking model for Nt-CCR5(1-27) suggests that residues 2-22 of Nt-CCR5 interact with the bases of V3 and C4, while the C-terminal segment of Nt-CCR5(1-27) points toward the target cell membrane, reflecting an Nt-CCR5 orientation that differs by 180° from that of a previous model. A gp120 site that could accommodate (CCR5)Y3 in a sulfated form has been identified. The present model attributes a structural basis for binding interactions to all gp120 residues previously implicated in Nt-CCR5 binding. Moreover, the strong interaction of sulfated (CCR5)Tyr14 with (gp120)Arg440 revealed by the model and the previously found correlation between E322 and R440 mutations shed light on the role of these residues in HIV-1 phenotype conversion, furthering our understanding of CCR5 recognition by HIV-1.

PubMed: 21763489
DOI: 10.1016/j.jmb.2011.04.023

実験手法

SOLUTION NMR