Crystal Structure of DNA Cytidine Deaminase ABOBEC3G Catalytic Deamination Domain Suggests a Binding Mode of Full-length Enzyme to Single-stranded DNA
文献类型：期刊论文
| 作者 | Lu, XX; Zhang, TL; Xu, Z; Liu, SS; Zhao, B; Lan, WX; Wang, CX; Ding, JP; Cao, CY |
| 刊名 | JOURNAL OF BIOLOGICAL CHEMISTRY
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| 出版日期 | 2015 |
| 卷号 | 290期号:7页码:4010-4021 |
| 通讯作者 | Cao, CY (reprint author), Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Bioorgan & Nat Prod Chem, 345 Lingling Rd, Shanghai 200032, Peoples R China.,ccao@mail.sioc.ac.cn |
| 英文摘要 | APOBEC3G (A3G) is a DNA cytidine deaminase (CD) that demonstrates antiviral activity against human immunodeficiency virus 1 (HIV-1) and other pathogenic virus. It has an inactive N-terminal CD1 virus infectivity factor (Vif) protein binding domain (A3G-CD1) and an actively catalytic C-terminal CD2 deamination domain (A3G-CD2). Although many studies on the structure of A3G-CD2 and enzymatic properties of full-length A3G have been reported, the mechanism of how A3G interacts with HIV-1 single-stranded DNA (ssDNA) is still not well characterized. Here, we reported a crystal structure of a novel A3G-CD2 head-to-tail dimer (in which the N terminus of the monomer H (head) interacts with the C terminus of monomer T (tail)), where a continuous DNA binding groove was observed. By constructing the A3G-CD1 structural model, we found that its overall fold was almost identical to that of A3G-CD2. We mutated the residues located in or along the groove in monomer H and the residues in A3G-CD1 that correspond to those seated in or along the groove in monomer T. Then, by performing enzymatic assays, we confirmed the reported key elements and the residues in A3G necessary to the catalytic deamination. Moreover, we identified more than 10 residues in A3G essential to DNA binding and deamination reaction. Therefore, this dimer structure may represent a structural model of full-length A3G, which indicates a possible binding mode of A3G to HIV-1 ssDNA. |
| 学科主题 | Biochemistry & Molecular Biology |
| 类目[WOS] | Biochemistry & Molecular Biology |
| 关键词[WOS] | HIV-1 VIF-BINDING ; SWISS-MODEL ; CBF-BETA ; FUNCTIONAL IMPLICATIONS ; APOBEC PROTEINS ; RNA ; RESTRICTION ; HYPERMUTATION ; SPECIFICITY ; INFECTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000349458400014 |
| 版本 | 出版稿 |
| 源URL | [http://202.127.25.143/handle/331003/83]  |
| 专题 | 上海生化细胞研究所_上海生科院生化细胞研究所 |
| 推荐引用方式 GB/T 7714 | Lu, XX,Zhang, TL,Xu, Z,et al. Crystal Structure of DNA Cytidine Deaminase ABOBEC3G Catalytic Deamination Domain Suggests a Binding Mode of Full-length Enzyme to Single-stranded DNA[J]. JOURNAL OF BIOLOGICAL CHEMISTRY,2015,290(7):4010-4021. |
| APA | Lu, XX.,Zhang, TL.,Xu, Z.,Liu, SS.,Zhao, B.,...&Cao, CY.(2015).Crystal Structure of DNA Cytidine Deaminase ABOBEC3G Catalytic Deamination Domain Suggests a Binding Mode of Full-length Enzyme to Single-stranded DNA.JOURNAL OF BIOLOGICAL CHEMISTRY,290(7),4010-4021. |
| MLA | Lu, XX,et al."Crystal Structure of DNA Cytidine Deaminase ABOBEC3G Catalytic Deamination Domain Suggests a Binding Mode of Full-length Enzyme to Single-stranded DNA".JOURNAL OF BIOLOGICAL CHEMISTRY 290.7(2015):4010-4021. |
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