Recognition of the major histocompatibility complex (MHC) class Ib molecule H2-Q10 by the natural killer cell receptor Ly49C

Lucy C. Sullivan, Richard Berry, Natasha Sosnin, Jacqueline M. L. Widjaja, Felix A. Deuss, Gautham R. Balaji, Joseph A. Trapani, Nicole L. LaGruta, Michiko Mirams, Jamie Rossjohn, Andrew G. Brooks, Daniel M. Andrews

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Murine natural killer (NK) cells are regulated by the interaction of Ly49 receptors with major histocompatibility complex class I molecules (MHC-I). Although the ligands for inhibitory Ly49 were considered to be restricted to classical MHC (MHC-Ia), we have shown that the non-classical MHC molecule (MHC-Ib) H2-M3 was a ligand for the inhibitory Ly49A. Here we establish that another MHC-Ib, H2-Q10, is a bona fide ligand for the inhibitory Ly49C receptor. H2-Q10 bound to Ly49C with a marginally lower affinity (∼5 μM) than that observed between Ly49C and MHC-Ia (H-2Kb/H-2Dd, both ∼1 μM), and this recognition could be prevented by cis interactions with H-2K in situ. To understand the molecular details underpinning Ly49·MHC-Ib recognition, we determined the crystal structures of H2-Q10 and Ly49C bound H2-Q10. Unliganded H2-Q10 adopted a classical MHC-I fold and possessed a peptide-binding groove that exhibited features similar to those found in MHC-Ia, explaining the diverse peptide binding repertoire of H2-Q10. Ly49C bound to H2-Q10 underneath the peptide binding platform to a region that encompassed residues from the α1, α2, and α3 domains, as well as the associated β2-microglobulin subunit. This docking mode was conserved with that previously observed for Ly49C·H-2Kb. Indeed, structure-guided mutation of Ly49C indicated that Ly49C·H2-Q10 and Ly49C·H-2Kb possess similar energetic footprints focused around residues located within the Ly49C β4-stand and L5 loop, which contact the underside of the peptide-binding platform floor. Our data provide a structural basis for Ly49·MHC-Ib recognition and demonstrate that MHC-Ib represent an extended family of ligands for Ly49 molecules.

Original languageEnglish
Pages (from-to)18740-18752
Number of pages13
JournalJournal of Biological Chemistry
Volume291
Issue number36
DOIs
Publication statusPublished - 2 Sep 2016

Keywords

  • crystal structure
  • innate immunity
  • major histocompatibility complex (MHC)
  • natural killer cells (NK cells)
  • receptor structure-function

Cite this

@article{f2ff23b1a1f94f9e94a7f6e840c796f1,
title = "Recognition of the major histocompatibility complex (MHC) class Ib molecule H2-Q10 by the natural killer cell receptor Ly49C",
abstract = "Murine natural killer (NK) cells are regulated by the interaction of Ly49 receptors with major histocompatibility complex class I molecules (MHC-I). Although the ligands for inhibitory Ly49 were considered to be restricted to classical MHC (MHC-Ia), we have shown that the non-classical MHC molecule (MHC-Ib) H2-M3 was a ligand for the inhibitory Ly49A. Here we establish that another MHC-Ib, H2-Q10, is a bona fide ligand for the inhibitory Ly49C receptor. H2-Q10 bound to Ly49C with a marginally lower affinity (∼5 μM) than that observed between Ly49C and MHC-Ia (H-2Kb/H-2Dd, both ∼1 μM), and this recognition could be prevented by cis interactions with H-2K in situ. To understand the molecular details underpinning Ly49·MHC-Ib recognition, we determined the crystal structures of H2-Q10 and Ly49C bound H2-Q10. Unliganded H2-Q10 adopted a classical MHC-I fold and possessed a peptide-binding groove that exhibited features similar to those found in MHC-Ia, explaining the diverse peptide binding repertoire of H2-Q10. Ly49C bound to H2-Q10 underneath the peptide binding platform to a region that encompassed residues from the α1, α2, and α3 domains, as well as the associated β2-microglobulin subunit. This docking mode was conserved with that previously observed for Ly49C·H-2Kb. Indeed, structure-guided mutation of Ly49C indicated that Ly49C·H2-Q10 and Ly49C·H-2Kb possess similar energetic footprints focused around residues located within the Ly49C β4-stand and L5 loop, which contact the underside of the peptide-binding platform floor. Our data provide a structural basis for Ly49·MHC-Ib recognition and demonstrate that MHC-Ib represent an extended family of ligands for Ly49 molecules.",
keywords = "crystal structure, innate immunity, major histocompatibility complex (MHC), natural killer cells (NK cells), receptor structure-function",
author = "Sullivan, {Lucy C.} and Richard Berry and Natasha Sosnin and Widjaja, {Jacqueline M. L.} and Deuss, {Felix A.} and Balaji, {Gautham R.} and Trapani, {Joseph A.} and LaGruta, {Nicole L.} and Michiko Mirams and Jamie Rossjohn and Brooks, {Andrew G.} and Andrews, {Daniel M.}",
year = "2016",
month = "9",
day = "2",
doi = "10.1074/jbc.M116.737130",
language = "English",
volume = "291",
pages = "18740--18752",
journal = "Journal of Biological Chemistry",
issn = "1083-351X",
publisher = "American Society for Biochemistry and Molecular Biology",
number = "36",

}

Recognition of the major histocompatibility complex (MHC) class Ib molecule H2-Q10 by the natural killer cell receptor Ly49C. / Sullivan, Lucy C.; Berry, Richard; Sosnin, Natasha ; Widjaja, Jacqueline M. L.; Deuss, Felix A.; Balaji, Gautham R.; Trapani, Joseph A.; LaGruta, Nicole L.; Mirams, Michiko; Rossjohn, Jamie; Brooks, Andrew G.; Andrews, Daniel M.

In: Journal of Biological Chemistry, Vol. 291, No. 36, 02.09.2016, p. 18740-18752.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Recognition of the major histocompatibility complex (MHC) class Ib molecule H2-Q10 by the natural killer cell receptor Ly49C

AU - Sullivan, Lucy C.

AU - Berry, Richard

AU - Sosnin, Natasha

AU - Widjaja, Jacqueline M. L.

AU - Deuss, Felix A.

AU - Balaji, Gautham R.

AU - Trapani, Joseph A.

AU - LaGruta, Nicole L.

AU - Mirams, Michiko

AU - Rossjohn, Jamie

AU - Brooks, Andrew G.

AU - Andrews, Daniel M.

PY - 2016/9/2

Y1 - 2016/9/2

N2 - Murine natural killer (NK) cells are regulated by the interaction of Ly49 receptors with major histocompatibility complex class I molecules (MHC-I). Although the ligands for inhibitory Ly49 were considered to be restricted to classical MHC (MHC-Ia), we have shown that the non-classical MHC molecule (MHC-Ib) H2-M3 was a ligand for the inhibitory Ly49A. Here we establish that another MHC-Ib, H2-Q10, is a bona fide ligand for the inhibitory Ly49C receptor. H2-Q10 bound to Ly49C with a marginally lower affinity (∼5 μM) than that observed between Ly49C and MHC-Ia (H-2Kb/H-2Dd, both ∼1 μM), and this recognition could be prevented by cis interactions with H-2K in situ. To understand the molecular details underpinning Ly49·MHC-Ib recognition, we determined the crystal structures of H2-Q10 and Ly49C bound H2-Q10. Unliganded H2-Q10 adopted a classical MHC-I fold and possessed a peptide-binding groove that exhibited features similar to those found in MHC-Ia, explaining the diverse peptide binding repertoire of H2-Q10. Ly49C bound to H2-Q10 underneath the peptide binding platform to a region that encompassed residues from the α1, α2, and α3 domains, as well as the associated β2-microglobulin subunit. This docking mode was conserved with that previously observed for Ly49C·H-2Kb. Indeed, structure-guided mutation of Ly49C indicated that Ly49C·H2-Q10 and Ly49C·H-2Kb possess similar energetic footprints focused around residues located within the Ly49C β4-stand and L5 loop, which contact the underside of the peptide-binding platform floor. Our data provide a structural basis for Ly49·MHC-Ib recognition and demonstrate that MHC-Ib represent an extended family of ligands for Ly49 molecules.

AB - Murine natural killer (NK) cells are regulated by the interaction of Ly49 receptors with major histocompatibility complex class I molecules (MHC-I). Although the ligands for inhibitory Ly49 were considered to be restricted to classical MHC (MHC-Ia), we have shown that the non-classical MHC molecule (MHC-Ib) H2-M3 was a ligand for the inhibitory Ly49A. Here we establish that another MHC-Ib, H2-Q10, is a bona fide ligand for the inhibitory Ly49C receptor. H2-Q10 bound to Ly49C with a marginally lower affinity (∼5 μM) than that observed between Ly49C and MHC-Ia (H-2Kb/H-2Dd, both ∼1 μM), and this recognition could be prevented by cis interactions with H-2K in situ. To understand the molecular details underpinning Ly49·MHC-Ib recognition, we determined the crystal structures of H2-Q10 and Ly49C bound H2-Q10. Unliganded H2-Q10 adopted a classical MHC-I fold and possessed a peptide-binding groove that exhibited features similar to those found in MHC-Ia, explaining the diverse peptide binding repertoire of H2-Q10. Ly49C bound to H2-Q10 underneath the peptide binding platform to a region that encompassed residues from the α1, α2, and α3 domains, as well as the associated β2-microglobulin subunit. This docking mode was conserved with that previously observed for Ly49C·H-2Kb. Indeed, structure-guided mutation of Ly49C indicated that Ly49C·H2-Q10 and Ly49C·H-2Kb possess similar energetic footprints focused around residues located within the Ly49C β4-stand and L5 loop, which contact the underside of the peptide-binding platform floor. Our data provide a structural basis for Ly49·MHC-Ib recognition and demonstrate that MHC-Ib represent an extended family of ligands for Ly49 molecules.

KW - crystal structure

KW - innate immunity

KW - major histocompatibility complex (MHC)

KW - natural killer cells (NK cells)

KW - receptor structure-function

UR - http://www.scopus.com/inward/record.url?scp=84984890653&partnerID=8YFLogxK

U2 - 10.1074/jbc.M116.737130

DO - 10.1074/jbc.M116.737130

M3 - Article

VL - 291

SP - 18740

EP - 18752

JO - Journal of Biological Chemistry

JF - Journal of Biological Chemistry

SN - 1083-351X

IS - 36

ER -