NMR structural characterization of the CDK inhibitor p19INK4d

NMR structural characterization of the CDK inhibitor p19INK4d
复制标题

CDK 抑制剂 p19INK4d 的 NMR 结构表征

DOI:
10.1016/s0014-5793(96)01465-2
复制
发表时间:
1997
期刊:
影响因子:
3.5
通讯作者:
T. Holak
T. Holak
中科院分区:
生物学3区
文献类型:
--
作者:
Wenzel Kalus;R. Baumgartner;C. Renner;A. Noegel;Francis Ka Ming Chan;A. Winoto;T. Holak

文献摘要

参考文献

被引文献

相似文献

p19 INK 4是一种由165个氨基酸组成的蛋白质,属于CDK 4和CDK 6抑制剂的INK 4家族。1H、15 N和13 C共振的重叠使得能够确定主要为α-螺旋的蛋白质的二级结构(残基14-18、21-29、54-62、77-83、87-95、110-116、120-128、142-148和152-160)。该蛋白质包含5个32个氨基酸的锚蛋白样重复序列;每个锚蛋白重复序列含有螺旋-β-转角-螺旋核心。例外的是第二个锚蛋白重复序列,它缺乏第一个螺旋。所有β-转角都有一个中心甘氨酸残基,两侧是β-构象中的两个残基。在p19的所有锚蛋白重复序列中,第一螺旋的第8位Ala和第二螺旋的第17-18位Leu-Leu(瓦尔)也具有高度保守性。在p19中发现的螺旋-转角-螺旋片段的位置对于INK 4家族的所有其他成员应该是通用的,包括例如同源肿瘤抑制因子p16 INK 4a。对p19的1H-15 N杂合稳态NOE测量表明,p19 INK 4dexists的大部分骨架存在于在纳秒至皮秒时间尺度上具有有限构象灵活性的明确结构中。
p19INK4dis a 165 amino acid protein that belongs to the INK4 family of CDK4 and CDK6 inhibitors. Assignments of1H,15N and13C resonances have enabled the determination of the secondary structure of the protein which is largely α-helical (residues 14–18, 21–29, 54–62, 77–83, 87–95, 110–116, 120–128, 142–148 and 152–160). The protein comprises five 32-amino acid ankyrin-like repeats; each ankyrin repeat contains a helix-β-turn-helix core. The exception is the second ankyrin repeat, which lacks the first helix. All β-turns have a central glycine residue flanked by two residues in β-conformations. There is also a high conservation of Ala at position 8 in the first helix and Leu-Leu(Val) at positions 17–18 of the second helix in all ankyrin repeats of p19. The location of the helix-turn-helix segments found in p19 should be general for all other members of the INK4 family, including, for example, a homologous tumor suppressor p16INK4a.1H-15N heteronuclear steady-state NOE measurements on p19 indicate that most of the backbone of p19INK4dexists in a well defined structure of limited conformational flexibility on the nano- to picosecond time scale.
DOI: 10.1101/gad.8.24.2939
发表时间: 1994-12-15
影响因子: 10.5
作者:
GUAN, KL;JENKINS, CW;XIONG, Y
通讯作者: XIONG, Y