Abstract:
:The zinc transporter protein ZIP13 plays critical roles in bone, tooth, and connective tissue development, and its dysfunction is responsible for the spondylocheirodysplastic form of Ehlers-Danlos syndrome (SCD-EDS, OMIM 612350). Here, we report the molecular pathogenic mechanism of SCD-EDS caused by two different mutant ZIP13 proteins found in human patients: ZIP13(G64D), in which Gly at amino acid position 64 is replaced by Asp, and ZIP13(ΔFLA), which contains a deletion of Phe-Leu-Ala. We demonstrated that both the ZIP13(G64D) and ZIP13(ΔFLA) protein levels are decreased by degradation via the valosin-containing protein (VCP)-linked ubiquitin proteasome pathway. The inhibition of degradation pathways rescued the protein expression levels, resulting in improved intracellular Zn homeostasis. Our findings uncover the pathogenic mechanisms elicited by mutant ZIP13 proteins. Further elucidation of these degradation processes may lead to novel therapeutic targets for SCD-EDS.
journal_name
EMBO Mol Medjournal_title
EMBO molecular medicineauthors
Bin BH,Hojyo S,Hosaka T,Bhin J,Kano H,Miyai T,Ikeda M,Kimura-Someya T,Shirouzu M,Cho EG,Fukue K,Kambe T,Ohashi W,Kim KH,Seo J,Choi DH,Nam YJ,Hwang D,Fukunaka A,Fujitani Y,Yokoyama S,Superti-Furga A,Ikegawa S,doi
10.15252/emmm.201303809subject
Has Abstractpub_date
2014-08-01 00:00:00pages
1028-42issue
8eissn
1757-4676issn
1757-4684pii
emmm.201303809journal_volume
6pub_type
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