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Publication Abstract from PubMed

Myeloid-derived growth factor (MYDGF) is a paracrine-acting protein that is produced by bone marrow-derived monocytes and macrophages to protect and repair the heart after myocardial infarction (MI). This effect can be used for the development of protein-based therapies for ischemic tissue repair, also beyond the sole application in heart tissue. Here, we report the X-ray structure of MYDGF and identify its functionally relevant receptor binding epitope. MYDGF consists of a 10-stranded beta-sandwich with a folding topology showing no similarities to other cytokines or growth factors. By characterizing the epitope of a neutralizing antibody and utilizing functional assays to study the activity of surface patch-mutations, we were able to localize the receptor interaction interface to a region around two surface tyrosine residues 71 and 73 and an adjacent prominent loop structure of residues 97-101. These findings enable structure-guided protein engineering to develop modified MYDGF variants with potentially improved properties for clinical use.

Crystal structure and receptor-interacting residues of MYDGF - a protein mediating ischemic tissue repair.,Ebenhoch R, Akhdar A, Reboll MR, Korf-Klingebiel M, Gupta P, Armstrong J, Huang Y, Frego L, Rybina I, Miglietta J, Pekcec A, Wollert KC, Nar H Nat Commun. 2019 Nov 26;10(1):5379. doi: 10.1038/s41467-019-13343-7. PMID:31772377^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.