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SET domain (including post-SET domain) found in nuclear SET domain-containing protein 2 (NSD2) and similar proteins NSD2 (EC 2.1.1.43; also termed multiple myeloma SET domain-containing protein (MMSET), protein trithorax-5 (TRX5), or wolf-Hirschhorn syndrome candidate 1 protein (WHSC1)) acts as histone-lysine N-methyltransferase with histone H3 'Lys-36' (H3K36me) methyltransferase activity. NSD2 has been shown to mediate di- and trimethylation of H3K36 and dimethylation of H4K20 in different systems, and has been characterized as a transcriptional repressor interacting with histone deacetylase HDAC1 and histone demethylase LSD1. NSD2 mediates constitutive NF-kappaB signaling for cancer cell proliferation, survival and tumor growth. It is highly overexpressed in several types of human cancers, including small-cell lung cancers, neuroblastoma, carcinomas of stomach and colon, and bladder cancers, and its overexpression tends to be associated with tumor aggressiveness. WHSC1 is frequently deleted in Wolf-Hirschhorn syndrome (WHS).
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