4rxj
crystal structure of WHSC1L1-PWWP2
Structural highlights
DiseaseNSD3_HUMAN Note=Defects in WHSC1L1 may be involved in non small cell lung carcinomas (NSCLC). Amplified or overexpressed in NSCLC.[1] Note=A chromosomal aberration involving WHSC1L1 is found in childhood acute myeloid leukemia. Translocation t(8;11)(p11.2;p15) with NUP98. FunctionNSD3_HUMAN Histone methyltransferase. Preferentially methylates 'Lys-4' and 'Lys-27' of histone H3. H3 'Lys-4' methylation represents a specific tag for epigenetic transcriptional activation, while 'Lys-27' is a mark for transcriptional repression.[2] Publication Abstract from PubMedThe NSD proteins, namely NSD1, NSD2 and NSD3, are lysine methyltransferases, which catalyze mono- and di-methylation of histone H3K36. They are multi-domain proteins, including two PWWP domains (PWWP1 and PWWP2) separated by some other domains. These proteins act as potent oncoproteins and are implicated in various cancers. However the biological functions of these PWWP domains are still largely unknown. To better understand the functions of these proteins' PWWP domains, we cloned, expressed and purified all the PWWP domains of these NSD proteins to characterize their interactions with methylated histone peptides and dsDNA by quantitative binding assays and crystallographic analysis. Our studies indicate that all these PWWP domains except NSD1_PWWP1 bind to trimethylated H3K36, H3K79 peptides and dsDNA weakly. Our crystal structures uncover that the NDS3_PWWP2 and NSD2_PWWP1 domains, which hold an extremely long alpha-helix and alpha-helix bundle, respectively, need a conformation adjustment to interact with nucleosome. Histone and DNA binding ability studies of the NSD subfamily of PWWP domains.,Zhang M, Yang Y, Zhou M, Dong A, Yan X, Loppnau P, Min J, Liu Y Biochem Biophys Res Commun. 2021 Jul 13;569:199-206. doi:, 10.1016/j.bbrc.2021.07.017. PMID:34271259[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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