3BIS
Crystal Structure of the PD-L1
Summary for 3BIS
Entry DOI | 10.2210/pdb3bis/pdb |
Related | 3BIK |
Descriptor | Programmed cell death 1 ligand 1 (2 entities in total) |
Functional Keywords | co-stimulation, immunoglobulin-like beta-sandwich, t cell, b cell, programmed death, immune system, transmembrane, inhibitory receptor, glycoprotein, immunoglobulin domain |
Biological source | Homo sapiens (human) |
Cellular location | Isoform 1: Cell membrane; Single-pass type I membrane protein. Isoform 2: Endomembrane system; Single-pass type I membrane protein: Q9NZQ7 |
Total number of polymer chains | 2 |
Total formula weight | 50793.56 |
Authors | Lin, D.Y.,Tanaka, Y.,Iwasaki, M.,Gittis, A.G.,Su, H.P.,Mikami, B.,Okazaki, T.,Honjo, T.,Minato, N.,Garboczi, D.N. (deposition date: 2007-11-30, release date: 2008-02-26, Last modification date: 2024-11-20) |
Primary citation | Lin, D.Y.,Tanaka, Y.,Iwasaki, M.,Gittis, A.G.,Su, H.P.,Mikami, B.,Okazaki, T.,Honjo, T.,Minato, N.,Garboczi, D.N. The PD-1/PD-L1 complex resembles the antigen-binding Fv domains of antibodies and T cell receptors. Proc.Natl.Acad.Sci.Usa, 105:3011-3016, 2008 Cited by PubMed Abstract: Signaling through the programmed death 1 (PD-1) inhibitory receptor upon binding its ligand, PD-L1, suppresses immune responses against autoantigens and tumors and plays an important role in the maintenance of peripheral immune tolerance. Release from PD-1 inhibitory signaling revives "exhausted" virus-specific T cells in chronic viral infections. Here we present the crystal structure of murine PD-1 in complex with human PD-L1. PD-1 and PD-L1 interact through the conserved front and side of their Ig variable (IgV) domains, as do the IgV domains of antibodies and T cell receptors. This places the loops at the ends of the IgV domains on the same side of the PD-1/PD-L1 complex, forming a surface that is similar to the antigen-binding surface of antibodies and T cell receptors. Mapping conserved residues allowed the identification of residues that are important in forming the PD-1/PD-L1 interface. Based on the structure, we show that some reported loss-of-binding mutations involve the PD-1/PD-L1 interaction but that others compromise protein folding. The PD-1/PD-L1 interaction described here may be blocked by antibodies or by designed small-molecule drugs to lower inhibitory signaling that results in a stronger immune response. The immune receptor-like loops offer a new surface for further study and potentially the design of molecules that would affect PD-1/PD-L1 complex formation and thereby modulate the immune response. PubMed: 18287011DOI: 10.1073/pnas.0712278105 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (2.64 Å) |
Structure validation
Download full validation report
