| 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] [ATRX_HUMAN] Defects in ATRX are the cause of alpha-thalassemia mental retardation syndrome X-linked (ATRX) [MIM:301040]. ATR-X is an X-linked disorder comprising severe psychomotor retardation, facial dysmorphism, urogenital abnormalities, and alpha-thalassemia. An essential phenotypic trait are hemoglobin H erythrocyte inclusions.[3] [4] [5] [6] [7] [8] [9] [10] [11] [12] Defects in ATRX are the cause of mental retardation syndromic X-linked with hypotonic facies syndrome type 1 (MRXSHF1) [MIM:309580]; also called Carpenter-Waziri syndrome (CWS), Juberg-Marsidi syndrome (JMS), Smith-Fineman-Myers syndrome type 1 (SFM1). Clinical features include severe mental retardation, dysmorphic facies, and a highly skewed X-inactivation pattern in carrier women. Other more variable features include hypogonadism, deafness, renal anomalies, and mild skeletal defects.[13] [14] [15] [16] [17] [18] Defects in ATRX are a cause of alpha-thalassemia myelodysplasia syndrome (ATMDS) [MIM:300448]. In this disorder, alpha-thalassemia occurs as an acquired abnormality in association with a multilineage myelodysplasia.[19]
Function
[BRD4_HUMAN] Plays a role in a process governing chromosomal dynamics during mitosis (By similarity). [ATRX_HUMAN] Could be a global transcriptional regulator. Modifies gene expression by affecting chromatin. May be involved in brain development and facial morphogenesis.
Publication Abstract from PubMed
Targeting bromodomains (BRDs) of the bromo-and-extra-terminal (BET) family offers opportunities for therapeutic intervention in cancer and other diseases. Here, we profile the interactomes of BRD2, BRD3, BRD4, and BRDT following treatment with the pan-BET BRD inhibitor JQ1, revealing broad rewiring of the interaction landscape, with three distinct classes of behavior for the 603 unique interactors identified. A group of proteins associate in a JQ1-sensitive manner with BET BRDs through canonical and new binding modes, while two classes of extra-terminal (ET)-domain binding motifs mediate acetylation-independent interactions. Last, we identify an unexpected increase in several interactions following JQ1 treatment that define negative functions for BRD3 in the regulation of rRNA synthesis and potentially RNAPII-dependent gene expression that result in decreased cell proliferation. Together, our data highlight the contributions of BET protein modules to their interactomes allowing for a better understanding of pharmacological rewiring in response to JQ1.
Interactome Rewiring Following Pharmacological Targeting of BET Bromodomains.,Lambert JP, Picaud S, Fujisawa T, Hou H, Savitsky P, Uuskula-Reimand L, Gupta GD, Abdouni H, Lin ZY, Tucholska M, Knight JDR, Gonzalez-Badillo B, St-Denis N, Newman JA, Stucki M, Pelletier L, Bandeira N, Wilson MD, Filippakopoulos P, Gingras AC Mol Cell. 2018 Dec 13. pii: S1097-2765(18)30948-1. doi:, 10.1016/j.molcel.2018.11.006. PMID:30554943[20]
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
- ↑ Picketts DJ, Higgs DR, Bachoo S, Blake DJ, Quarrell OW, Gibbons RJ. ATRX encodes a novel member of the SNF2 family of proteins: mutations point to a common mechanism underlying the ATR-X syndrome. Hum Mol Genet. 1996 Dec;5(12):1899-907. PMID:8968741
- ↑ Gibbons RJ, Picketts DJ, Villard L, Higgs DR. Mutations in a putative global transcriptional regulator cause X-linked mental retardation with alpha-thalassemia (ATR-X syndrome). Cell. 1995 Mar 24;80(6):837-45. PMID:7697714
- ↑ Villard L, Lacombe D, Fontes M. A point mutation in the XNP gene, associated with an ATR-X phenotype without alpha-thalassemia. Eur J Hum Genet. 1996;4(6):316-20. PMID:9043863
- ↑ Gibbons RJ, Bachoo S, Picketts DJ, Aftimos S, Asenbauer B, Bergoffen J, Berry SA, Dahl N, Fryer A, Keppler K, Kurosawa K, Levin ML, Masuno M, Neri G, Pierpont ME, Slaney SF, Higgs DR. Mutations in transcriptional regulator ATRX establish the functional significance of a PHD-like domain. Nat Genet. 1997 Oct;17(2):146-8. PMID:9326931 doi:10.1038/ng1097-146
- ↑ Fichera M, Romano C, Castiglia L, Failla P, Ruberto C, Amata S, Greco D, Cardoso C, Fontes M, Ragusa A. New mutations in XNP/ATR-X gene: a further contribution to genotype/phenotype relationship in ATR/X syndrome. Mutations in brief no. 176. Online. Hum Mutat. 1998;12(3):214. PMID:10660327
- ↑ Lossi AM, Millan JM, Villard L, Orellana C, Cardoso C, Prieto F, Fontes M, Martinez F. Mutation of the XNP/ATR-X gene in a family with severe mental retardation, spastic paraplegia and skewed pattern of X inactivation: demonstration that the mutation is involved in the inactivation bias. Am J Hum Genet. 1999 Aug;65(2):558-62. PMID:10417298 doi:10.1086/302499
- ↑ Villard L, Bonino MC, Abidi F, Ragusa A, Belougne J, Lossi AM, Seaver L, Bonnefont JP, Romano C, Fichera M, Lacombe D, Hanauer A, Philip N, Schwartz C, Fontes M. Evaluation of a mutation screening strategy for sporadic cases of ATR-X syndrome. J Med Genet. 1999 Mar;36(3):183-6. PMID:10204841
- ↑ Wada T, Kubota T, Fukushima Y, Saitoh S. Molecular genetic study of japanese patients with X-linked alpha-thalassemia/mental retardation syndrome (ATR-X). Am J Med Genet. 2000 Sep 18;94(3):242-8. PMID:10995512
- ↑ Yntema HG, Poppelaars FA, Derksen E, Oudakker AR, van Roosmalen T, Jacobs A, Obbema H, Brunner HG, Hamel BC, van Bokhoven H. Expanding phenotype of XNP mutations: mild to moderate mental retardation. Am J Med Genet. 2002 Jul 1;110(3):243-7. PMID:12116232 doi:10.1002/ajmg.10446
- ↑ Badens C, Martini N, Courrier S, DesPortes V, Touraine R, Levy N, Edery P. ATRX syndrome in a girl with a heterozygous mutation in the ATRX Zn finger domain and a totally skewed X-inactivation pattern. Am J Med Genet A. 2006 Oct 15;140(20):2212-5. PMID:16955409 doi:10.1002/ajmg.a.31400
- ↑ Villard L, Fontes M, Ades LC, Gecz J. Identification of a mutation in the XNP/ATR-X gene in a family reported as Smith-Fineman-Myers syndrome. Am J Med Genet. 2000 Mar 6;91(1):83-5. PMID:10751095
- ↑ Villard L, Gecz J, Mattei JF, Fontes M, Saugier-Veber P, Munnich A, Lyonnet S. XNP mutation in a large family with Juberg-Marsidi syndrome. Nat Genet. 1996 Apr;12(4):359-60. PMID:8630485 doi:http://dx.doi.org/10.1038/ng0496-359
- ↑ Abidi F, Schwartz CE, Carpenter NJ, Villard L, Fontes M, Curtis M. Carpenter-Waziri syndrome results from a mutation in XNP. Am J Med Genet. 1999 Jul 30;85(3):249-51. PMID:10398237
- ↑ Stevenson RE, Abidi F, Schwartz CE, Lubs HA, Holmes LB. Holmes-Gang syndrome is allelic with XLMR-hypotonic face syndrome. Am J Med Genet. 2000 Oct 23;94(5):383-5. PMID:11050622
- ↑ Leahy RT, Philip RK, Gibbons RJ, Fisher C, Suri M, Reardon W. Asplenia in ATR-X syndrome: a second report. Am J Med Genet A. 2005 Nov 15;139(1):37-9. PMID:16222662 doi:10.1002/ajmg.a.30990
- ↑ Wieland I, Sabathil J, Ostendorf A, Rittinger O, Ropke A, Winnepenninckx B, Kooy F, Holinski-Feder E, Wieacker P. A missense mutation in the coiled-coil motif of the HP1-interacting domain of ATR-X in a family with X-linked mental retardation. Neurogenetics. 2005 Feb;6(1):45-7. PMID:15565397 doi:10.1007/s10048-004-0190-3
- ↑ Gibbons RJ, Pellagatti A, Garrick D, Wood WG, Malik N, Ayyub H, Langford C, Boultwood J, Wainscoat JS, Higgs DR. Identification of acquired somatic mutations in the gene encoding chromatin-remodeling factor ATRX in the alpha-thalassemia myelodysplasia syndrome (ATMDS). Nat Genet. 2003 Aug;34(4):446-9. PMID:12858175 doi:10.1038/ng1213
- ↑ Lambert JP, Picaud S, Fujisawa T, Hou H, Savitsky P, Uuskula-Reimand L, Gupta GD, Abdouni H, Lin ZY, Tucholska M, Knight JDR, Gonzalez-Badillo B, St-Denis N, Newman JA, Stucki M, Pelletier L, Bandeira N, Wilson MD, Filippakopoulos P, Gingras AC. Interactome Rewiring Following Pharmacological Targeting of BET Bromodomains. Mol Cell. 2018 Dec 13. pii: S1097-2765(18)30948-1. doi:, 10.1016/j.molcel.2018.11.006. PMID:30554943 doi:http://dx.doi.org/10.1016/j.molcel.2018.11.006
|
