| abstract |
SET domain (including post-SET domain) found in SET domain-containing protein 2 (SETD2) and similar proteins. SETD2 (also termed HIF-1, huntingtin yeast partner B, huntingtin-interacting protein 1 (HIP-1), huntingtin-interacting protein B, lysine N-methyltransferase 3A or protein-lysine N-methyltransferase SETD2) acts as histone-lysine N-methyltransferase that specifically trimethylates 'Lys-36' of histone H3 (H3K36me3) using demethylated 'Lys-36' (H3K36me2) as substrate. It has been shown that methylation is a posttranslational modification of dynamic microtubules and that SETD2 methylates alpha-tubulin at lysine 40, the same lysine that is marked by acetylation on microtubules. Methylation of microtubules occurs during mitosis and cytokinesis and can be ablated by SETD2 deletion, which causes mitotic spindle and cytokinesis defects, micronuclei, and polyploidy. |