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题名: Analysis of the nicotinamide phosphoribosyltransferase family provides insight into vertebrate adaptation to different oxygen levels during the water-to-land transition
作者: Fang, Chengchi1, 2; Guan, Lihong1, 2; Zhong, Zaixuan1, 2; Gan, Xiaoni1; He, Shunping1
关键词: adaptation ; NAMPT ; oxygen level ; vertebrates ; water-to-land transition
刊名: FEBS JOURNAL
发表日期: 2015-08-01
DOI: 10.1111/febs.13327
卷: 282, 期:15, 页:2858-2878
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology
研究领域[WOS]: Biochemistry & Molecular Biology
英文摘要: One of the most important events in vertebrate evolutionary history is the water-to-land transition, during which some morphological and physiological changes occurred in concert with the loss of specific genes in tetrapods. However, the molecular mechanisms underlying this transition have not been well explored. To explore vertebrate adaptation to different oxygen levels during the water-to-land transition, we performed comprehensive bioinformatics and experimental analysis aiming to investigate the NAMPT family in vertebrates. NAMPT, a rate-limiting enzyme in the salvage pathway of NAD+ biosynthesis, is critical for cell survival in a hypoxic environment, and a high level of NAMPT significantly augments oxidative stress in normoxic environments. Phylogenetic analysis showed that NAMPT duplicates arose from a second round whole-genome duplication event. NAMPTA existed in all classes of vertebrates, whereas NAMPTB was only found in fishes and not tetrapods. Asymmetric evolutionary rates and purifying selection were the main evolutionary forces involved. Although functional analysis identified several functionally divergent sites during NAMPT family evolution, invitro experimental data demonstrated that NAMPTA and NAMPTB were functionally conserved for NAMPT enzymatic function in the NAD+ salvage pathway. Insitu hybridization revealed broad NAMPTA and NAMPTB expression patterns, implying regulatory functions over a wide range of developmental processes. The morpholino-mediated knockdown data demonstrated that NAMPTA was more essential than NAMPTB for vertebrate embryo development. We propose that the retention of NAMPTB in water-breathing fishes and its loss in air-breathing tetrapods resulted from vertebrate adaptation to different oxygen levels during the water-to-land transition.
关键词[WOS]: COLONY-ENHANCING FACTOR ; FUNCTIONAL DIVERGENCE ; MAXIMUM-LIKELIHOOD ; BIOSYNTHETIC ENZYME ; POSITIVE SELECTION ; GENE DUPLICATION ; CELL-SURVIVAL ; EVOLUTION ; VISFATIN ; EXPRESSION
语种: 英语
WOS记录号: WOS:000358840500006
ISSN号: 1742-464X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/25973
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
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