Centrosome dysfunction associated with somatic expression of the synaptonemal complex protein TEX12

Sumit Sandhu, Ieng F. Sou, Jill E. Hunter, Lucy Salmon, Caroline L. Wilson, Neil D. Perkins, Neil Hunter*, Owen R. Davies, Urszula L. McClurg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The synaptonemal complex (SC) is a supramolecular protein scaffold that mediates chromosome synapsis and facilitates crossing over during meiosis. In mammals, SC proteins are generally assumed to have no other function. Here, we show that SC protein TEX12 also localises to centrosomes during meiosis independently of chromosome synapsis. In somatic cells, ectopically expressed TEX12 similarly localises to centrosomes, where it is associated with centrosome amplification, a pathology correlated with cancer development. Indeed, TEX12 is identified as a cancer-testis antigen and proliferation of some cancer cells is TEX12-dependent. Moreover, somatic expression of TEX12 is aberrantly activated via retinoic acid signalling, which is commonly disregulated in cancer. Structure-function analysis reveals that phosphorylation of TEX12 on tyrosine 48 is important for centrosome amplification but not for recruitment of TEX12 to centrosomes. We conclude that TEX12 normally localises to meiotic centrosomes, but its misexpression in somatic cells can contribute to pathological amplification and dysfunction of centrosomes in cancers.

Original languageEnglish
Article number1371
Number of pages13
JournalCommunications biology
Issue number1
Publication statusPublished - 8 Dec 2021


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