National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM146830
United States
Citation
Journal: Proc Natl Acad Sci U S A / Year: 2025 Title: Structural insights into the activation and inhibition of the ADAM17-iRhom2 complex. Authors: Joseph J Maciag / Conner E Slone / Hala F Alnajjar / Maria F Rich / Bryce Guion / Igal Ifergan / Carl P Blobel / Tom C M Seegar / Abstract: The endopeptidase activity of ADAM (a disintegrin and metalloproteinase)-17, the primary processor of several EGFR ligands and tumor necrosis factor-alpha (TNF-α), is essential for proper embryonic ...The endopeptidase activity of ADAM (a disintegrin and metalloproteinase)-17, the primary processor of several EGFR ligands and tumor necrosis factor-alpha (TNF-α), is essential for proper embryonic development and immune regulation. Dysregulated ADAM17 activity is prevalent in a wide array of human diseases, including cancer, chronic inflammation, and SARS-CoV-2 viral progression. Initially translated as an inactive zymogen, ADAM17 maturation and enzymatic function are tightly regulated by its obligate binding partners, the inactive rhomboid proteins (iRhom) -1 and -2. Here, we present the cryo-EM structure of the ADAM17 zymogen bound to iRhom2. Our findings elucidate the interactions within the ADAM17-iRhom2 complex, the inhibitory mechanisms of the therapeutic MEDI3622 antibody and ADAM17 prodomain, and the previously unknown role of a membrane-proximal cytoplasmic reentry loop of iRhom2 involved in the mechanism of activation. Importantly, we perform cellular assays to validate our structural findings and provide further insights into the functional implications of these interactions, paving the way for developing therapeutic strategies targeting this biomedically critical enzyme complex.
Entire : Human ADAM17 Pro-Metalloprotease Bound to MEDI3622 Fab
Entire
Name: Human ADAM17 Pro-Metalloprotease Bound to MEDI3622 Fab
Components
Complex: Human ADAM17 Pro-Metalloprotease Bound to MEDI3622 Fab
Protein or peptide: Disintegrin and metalloproteinase domain-containing protein 17
Protein or peptide: MEDI3622 Fab Light Chain
Protein or peptide: MEDI3622 Fab Heavy Chain
Ligand: ZINC ION
-
Supramolecule #1: Human ADAM17 Pro-Metalloprotease Bound to MEDI3622 Fab
Supramolecule
Name: Human ADAM17 Pro-Metalloprotease Bound to MEDI3622 Fab type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)
Organism: Homo sapiens (human)
Molecular weight
Theoretical: 100 KDa
-
Macromolecule #1: Disintegrin and metalloproteinase domain-containing protein 17
Macromolecule
Name: Disintegrin and metalloproteinase domain-containing protein 17 type: protein_or_peptide / ID: 1 / Details: Human ADAM17 Prodomain and Metalloprotease Domains / Number of copies: 1 / Enantiomer: LEVO / EC number: ADAM 17 endopeptidase
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