Basic Tilted Helix Bundle - a new protein fold in human FKBP25/FKBP3 and HectD1.
Basic Tilted Helix Bundle - a new protein fold in human FKBP25/FKBP3 and HectD1.
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DOI:
10.1016/j.bbrc.2014.03.068
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发表时间:
2014-04-25
影响因子:
3.1
通讯作者:
Sunnerhagen, Maria
中科院分区:
文献类型:
--
作者:
Helander, Sara;Montecchio, Meri;Lemak, Alexander;Fares, Christophe;Almof, Jonas;Li, Yanjun;Yee, Adelinda;Arrowsmith, Cheryl H.;Dhe-Paganon, Sirano;Sunnerhagen, Maria
In this paper, we describe the structure of a novel, unique N-terminal domain motif in the nuclear FKBP251-73, a member of the FKBP family, together with the structure of a sequence-related subdomain of the E3 ubiquitin ligase HectD1 which we show belongs to the same fold. This novel motif adopts a compact 5-helix bundle which we name the BTHB (Basic Tilted Helix Bundle) domain. A positively charged surface patch, structurally centered around the tilted helix H3, is present in both FKBP25 and HectD1 and is evolutionary conserved for both proteins, suggesting a conserved functional role. By detailed comparative analysis of the structures of the two proteins and their sequence similarities, and by analyzing the interaction of the proposed FKBP25 binding protein YY1, we suggest that the basic motif in BTHB is involved in the observed DNA binding of FKBP25, and can be affected by regulatory YY1 binding and/or interactions with adjacent domains.
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影响因子:
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通讯作者:
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