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Sequence and structural alignments reveal insights into ANKLE2 evolution and function

delete2026-05-15
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OA
AI
A
Adam T. Fishburn
C
Cole J. Florio
C
Chase L. S. Skawinski
S
Sydney S. Becker
E
Ethan Holleman
A
Avery E. Robertson
R
Rees Sitchon
F
Frédéric Chédin
P
Priya S. Shah *
DOI:10.1002/pro.70618delete
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摘要

摘要

En 中文
ANKLE2是一种具有新兴角色(在细胞分裂、发育和病毒复制中)的神秘蛋白。尽管所有动物中都存在ANKLE2同源物,但其结构域组成已随时间演化。ANKLE2的两个命名结构域——锚蛋白重复序列域和LEM域(以LAP2、Emerin和MAN1命名)具有明确且定义清晰的作用;然而几乎所有ANKLE2同源物至少还有三个其他结构域,其目的尚不明确。本研究中,我们通过ANKLE2同源物的序列和结构比对,以增进对该蛋白的演化和功能理解。我们发现ANKLE2的跨膜结构域可能演化较晚,并伴随着VAPA相互作用作为膜锚定机制的丧失。我们证明尽管氨基酸序列差异显著,LEM域和锚蛋白重复序列域的结构在ANKLE2同源物中高度保守。为探究ANKLE2未表征的结构域,我们进行结构比对以识别相似蛋白。这揭示了ANKLE2部分区域与核酸酶或核酸结合蛋白之间令人惊讶的相似性。然而,ANKLE2缺乏赋予这些结构域功能的关键基序,这通过实验质询得到证实。我们进一步发现ANKLE2的缺失与DNA损伤反应和微核形成的变化相关。我们认为此方法展示了结合结构预测与经典分子技术在探索未充分理解蛋白中的强大力量。
Keyword:
AlphaFold
ANKLE2
ankyrin repeat domain
evolution
LEM-domain
sequence alignment
structural prediction
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Protein Science
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