Cooperative interactions between HOX and PBX proteins mediated by a conserved peptide motif

Cooperative interactions between HOX and PBX proteins mediated by a conserved peptide motif
复制标题

HOX 和 PBX 蛋白之间由保守肽基序介导的协同相互作用

DOI:
10.1128/mcb.15.8.3989
复制
发表时间:
1995
影响因子:
5.3
通讯作者:
M. Featherstone
M. Featherstone
中科院分区:
生物学2区
文献类型:
--
作者:
M. Phelan;I. Rambaldi;M. Featherstone

文献摘要

参考文献

被引文献

相似文献

Hox/HOM基因家族的同源蛋白产物通过靶基因的转录调节来形成动物胚胎。我们先前已经表明,唇组蛋白HOXA-1具有固有的弱DNA结合活性,这是由于其同源结构域的N-末端臂中的残基(M. L.伊坎河Sadoul和M. S.费瑟斯通Cell. 14:5066-5075,1994)。这一观察结果表明,HOX和HOM蛋白需要辅因子与DNA稳定相互作用。我们已经证明,一个假定的HOX辅因子,PBX 1A,参与合作DNA结合HOXA-1和变形组蛋白HOXD-4。三种Abdominal-B类HOX蛋白未能与PBX 1A合作。我们将HOXD-4的相互作用结构域映射到YPWMK五肽基序,这是一个保守序列,位于HOXA-1和许多其他同源异型蛋白同源结构域的N端,但不存在于Abdominal-B类。E2 A的转录激活结构域与PBX 1的天然融合产生了一种与人前B细胞白血病有关的癌蛋白(M. P. Kamps,C. Murre,X.- H. Sun和D.巴尔的摩,细胞60:547-555,1990年; J. Nourse,JD Mellentin,N. Galili,J.威尔金森,E.星桥,S. D. Smith和M. L. Cleary,Cell 60:535-545,1990)。一个五肽突变,废除与PBX 1A在体外的合作相互作用,也废除协同转录激活与E2 A/PBX癌蛋白。PBX家族成员通过HOX五肽的直接接触可能在发育和致癌过程中发挥重要作用。
Homeoprotein products of the Hox/HOM gene family pattern the animal embryo through the transcriptional regulation of target genes. We have previously shown that the labial group protein HOXA-1 has intrinsically weak DNA-binding activity due to residues in the N-terminal arm of its homeodomain (M. L. Phelan, R. Sadoul, and M. S. Featherstone, Mol. Cell. Biol. 14:5066-5075, 1994). This observation, among others, suggests that HOX and HOM proteins require cofactors for stable interactions with DNA. We have demonstrated that a putative HOX cofactor, PBX1A, participates in cooperative DNA binding with HOXA-1 and the Deformed group protein HOXD-4. Three Abdominal-B class HOX proteins failed to cooperate with PBX1A. We mapped the interacting domain of HOXD-4 to the YPWMK pentapeptide motif, a conserved sequence found N terminal to the homeodomain of HOXA-1 and many other homeoproteins but absent from the Abdominal-B class. The naturally occurring fusion of the transcriptional activation domain of E2A with PBX1 creates an oncoprotein implicated in human pre-B-cell leukemias (M. P. Kamps, C. Murre, X.-H. Sun, and D. Baltimore, Cell 60:547-555, 1990; J. Nourse, J. D. Mellentin, N. Galili, J. Wilkinson, E. Starbridge, S. D. Smith, and M. L. Cleary, Cell 60:535-545, 1990). A pentapeptide mutation that abolished cooperative interaction with PBX1A in vitro also abrogated synergistic transcriptional activation with the E2A/PBX oncoprotein. The direct contact of PBX family members by the HOX pentapeptide is likely to play an important role in developmental and oncogenic processes.
通过外齿和同源异型选择蛋白协调下游基因的调节。
DOI: 10.1002/j.1460-2075.1994.tb06663.x
发表时间: 1994
期刊: The EMBO journal
影响因子: --
作者:
Rauskolb,C;Wieschaus,E
通讯作者: Wieschaus,E
DOI: 10.1101/gad.4.7.1209
发表时间: 1990-07
影响因子: 10.5
作者:
Mark Peifer;Eric Wieschaus
通讯作者: Mark Peifer;Eric Wieschaus
DOI: 10.1101/gad.3.1.26
发表时间: 1989-01-01
影响因子: 10.5
作者:
HILL, RE;JONES, PF;DAVIDSON, DR
通讯作者: DAVIDSON, DR
缺乏螺旋 3 特定侧链的同源结构域蛋白仍然可以结合 DNA 并直接抑制转录。
DOI: 10.1101/gad.9.2.182
发表时间: 1995
影响因子: 10.5
作者:
Vershon,AK;Jin,Y;Johnson,AD
通讯作者: Johnson,AD
与 E2A 融合改变了 t(1;19) 白血病中同源结构域蛋白 PBX1 的转录特性。
DOI: --
发表时间: 1994
期刊: Oncogene
影响因子: 8
作者:
LeBrun,DP;Cleary,ML
通讯作者: Cleary,ML