| Structural highlights
Disease
[BRD4_HUMAN] Note=A chromosomal aberration involving BRD4 is found in a rare, aggressive, and lethal carcinoma arising in midline organs of young people. Translocation t(15;19)(q14;p13) with NUT which produces a BRD4-NUT fusion protein.[1] [2] [NSD3_HUMAN] Note=Defects in WHSC1L1 may be involved in non small cell lung carcinomas (NSCLC). Amplified or overexpressed in NSCLC.[3] Note=A chromosomal aberration involving WHSC1L1 is found in childhood acute myeloid leukemia. Translocation t(8;11)(p11.2;p15) with NUP98.
Function
[BRD4_HUMAN] Plays a role in a process governing chromosomal dynamics during mitosis (By similarity). [NSD3_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.[4]
Publication Abstract from PubMed
The bromodomains and extra-terminal domain (BET) proteins direct gene transcription in chromatin, and represent new drug targets for cancer and inflammation. Here we report that the ET domain of the BET protein BRD4 recognizes an amphipathic protein sequence motif through establishing a two-strand antiparallel beta sheet anchored on a hydrophobic cleft of the three-helix bundle. This structural mechanism likely explains BRD4 interactions with numerous cellular and viral proteins such as Kaposi's sarcoma-associated herpesvirus latency-associated nuclear antigen, and NSD3 whose interaction with BRD4 via this ET domain mechanism is essential for acute myeloid leukemia maintenance.
Structural Mechanism of Transcriptional Regulator NSD3 Recognition by the ET Domain of BRD4.,Zhang Q, Zeng L, Shen C, Ju Y, Konuma T, Zhao C, Vakoc CR, Zhou MM Structure. 2016 Jul 6;24(7):1201-8. doi: 10.1016/j.str.2016.04.019. Epub 2016 Jun, 9. PMID:27291650[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ French CA, Miyoshi I, Kubonishi I, Grier HE, Perez-Atayde AR, Fletcher JA. BRD4-NUT fusion oncogene: a novel mechanism in aggressive carcinoma. Cancer Res. 2003 Jan 15;63(2):304-7. PMID:12543779
- ↑ French CA, Miyoshi I, Aster JC, Kubonishi I, Kroll TG, Dal Cin P, Vargas SO, Perez-Atayde AR, Fletcher JA. BRD4 bromodomain gene rearrangement in aggressive carcinoma with translocation t(15;19). Am J Pathol. 2001 Dec;159(6):1987-92. PMID:11733348 doi:10.1016/S0002-9440(10)63049-0
- ↑ Tonon G, Wong KK, Maulik G, Brennan C, Feng B, Zhang Y, Khatry DB, Protopopov A, You MJ, Aguirre AJ, Martin ES, Yang Z, Ji H, Chin L, Depinho RA. High-resolution genomic profiles of human lung cancer. Proc Natl Acad Sci U S A. 2005 Jul 5;102(27):9625-30. Epub 2005 Jun 27. PMID:15983384 doi:10.1073/pnas.0504126102
- ↑ Kim SM, Kee HJ, Eom GH, Choe NW, Kim JY, Kim YS, Kim SK, Kook H, Kook H, Seo SB. Characterization of a novel WHSC1-associated SET domain protein with H3K4 and H3K27 methyltransferase activity. Biochem Biophys Res Commun. 2006 Jun 23;345(1):318-23. Epub 2006 Apr 27. PMID:16682010 doi:S0006-291X(06)00939-9
- ↑ Zhang Q, Zeng L, Shen C, Ju Y, Konuma T, Zhao C, Vakoc CR, Zhou MM. Structural Mechanism of Transcriptional Regulator NSD3 Recognition by the ET Domain of BRD4. Structure. 2016 Jul 6;24(7):1201-8. doi: 10.1016/j.str.2016.04.019. Epub 2016 Jun, 9. PMID:27291650 doi:http://dx.doi.org/10.1016/j.str.2016.04.019
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