Structure of mouse muskelin discoidin domain and biochemical characterization of its self-association

Kook Han Kim, Seung Kon Hong, Kwang Yeon Hwang, Eunice Eunkyeong Kim

Research output: Contribution to journalArticle

Abstract

Muskelin is an intracellular kelch-repeat protein comprised of discoidin, LisH, CTLH and kelch-repeat domains. It is involved in cell adhesion and the regulation of cytoskeleton dynamics as well as being a component of a putative E3 ligase complex. Here, the first crystal structure of mouse muskelin discoidin domain (MK-DD) is reported at 1.55 Å resolution, which reveals a distorted eight-stranded β-barrel with two short α-helices at one end of the barrel. Interestingly, the N- and C-termini are not linked by the disulfide bonds found in other eukaryotic discoidin structures. A highly conserved MIND motif appears to be the determinant for MK-DD specific interaction together with the spike loops. Analysis of interdomain interaction shows that MK-DD binds the kelch-repeat domain directly and that this interaction depends on the presence of the LisH domain.

Original languageEnglish
Pages (from-to)2863-2874
Number of pages12
JournalActa Crystallographica Section D: Biological Crystallography
Volume70
Issue number11
DOIs
Publication statusPublished - 2014 Jan 1

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