Activation-induced cytidine deaminase shuttles between nucleus and cytoplasm like apolipoprotein B mRNA editing catalytic polypeptide 1

被引：239

作者：

Ito, S ^{[1
]}

Nagaoka, H ^{[1
]}

Shinkura, R ^{[1
]}

Begum, N ^{[1
]}

Muramatsu, M ^{[1
]}

Nakata, M ^{[1
]}

Honjo, T ^{[1
]}

机构：

[1] Kyoto Univ, Dept Med Chem, Grad Sch Med, Sakyo Ku, Kyoto 6068501, Japan

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2004年 / 101卷 / 07期

关键词：

D O I：

10.1073/pnas.0307335101

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Activation-induced cytidine deaminase (AID) is a molecule central to initiating class switch recombination, somatic hypermutation, and gene conversion of Ig genes. However, its mechanism to initiate these genetic alterations is still unclear. AID can convert cytosine to uracil on either mRNA or DNA and is involved in DNA cleavage. Although these events are expected to take place in the nucleus, overexpressed AID was found predominantly in the cytoplasm. Here, we demonstrated that AID is a nucleocytoplasmic shuttling protein with a bipartite nuclear localization signal and a nuclear export signal in its N and C termini, respectively. In addition to previously identified genetic, structural, and biochemical similarities of AID with apolipoprotein B mRNA editing catalytic polypeptide 1, an RNA editing enzyme of ApoB100 mRNA, the present finding provides another aspect to their resemblance, suggesting that both may have homologous reaction mechanisms.

引用

页码：1975 / 1980

页数：6

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