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A missense mutation in the MLKL brace region promotes lethal neonatal inflammation and hematopoietic dysfunction.

Joanne M Hildebrand | Maria Kauppi | Ian J Majewski | Zikou Liu | Allison J Cox | Sanae Miyake | Emma J Petrie | Michael A Silk | Zhixiu Li | Maria C Tanzer | Gabriela Brumatti | Samuel N Young | Cathrine Hall | Sarah E Garnish | Jason Corbin | Michael D Stutz | Ladina Di Rago | Pradnya Gangatirkar | Emma C Josefsson | Kristin Rigbye | Holly Anderton | James A Rickard | Anne Tripaydonis | Julie Sheridan | Thomas S Scerri | Victoria E Jackson | Peter E Czabotar | Jian-Guo Zhang | Leila Varghese | Cody C Allison | Marc Pellegrini | Gillian M Tannahill | Esme C Hatchell | Tracy A Willson | Dina Stockwell | Carolyn A de Graaf | Janelle Collinge | Adrienne Hilton | Natasha Silke | Sukhdeep K Spall | Diep Chau | Vicki Athanasopoulos | Donald Metcalf | Ronald M Laxer | Alexander G Bassuk | Benjamin W Darbro | Maria A Fiatarone Singh | Nicole Vlahovich | David Hughes | Maria Kozlovskaia | David B Ascher | Klaus Warnatz | Nils Venhoff | Jens Thiel | Christine Biben | Stefan Blum | John Reveille | Michael S Hildebrand | Carola G Vinuesa | Pamela McCombe | Matthew A Brown | Benjamin T Kile | Catriona McLean | Melanie Bahlo | Seth L Masters | Hiroyasu Nakano | Polly J Ferguson | James M Murphy | Warren S Alexander | John Silke
Nature communications | 2020

MLKL is the essential effector of necroptosis, a form of programmed lytic cell death. We have isolated a mouse strain with a single missense mutation, MlklD139V, that alters the two-helix 'brace' that connects the killer four-helix bundle and regulatory pseudokinase domains. This confers constitutive, RIPK3 independent killing activity to MLKL. Homozygous mutant mice develop lethal postnatal inflammation of the salivary glands and mediastinum. The normal embryonic development of MlklD139V homozygotes until birth, and the absence of any overt phenotype in heterozygotes provides important in vivo precedent for the capacity of cells to clear activated MLKL. These observations offer an important insight into the potential disease-modulating roles of three common human MLKL polymorphisms that encode amino acid substitutions within or adjacent to the brace region. Compound heterozygosity of these variants is found at up to 12-fold the expected frequency in patients that suffer from a pediatric autoinflammatory disease, chronic recurrent multifocal osteomyelitis (CRMO).

Pubmed ID: 32561755 RIS Download

Associated grants

  • Agency: Wellcome Trust, United Kingdom
    Id: 076113
  • Agency: Arthritis Research UK, United Kingdom
    Id: 19536
  • Agency: NIAMS NIH HHS, United States
    Id: R01 AR059703
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM082729
  • Agency: Wellcome Trust, United Kingdom
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM008629
  • Agency: Arthritis Research UK, United Kingdom
    Id: 18797
  • Agency: Wellcome Trust, United Kingdom
    Id: 208694/Z/17/Z

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