Biosynthetic gene cluster of cetoniacytone A, an unusual aminocyclitol from the endosymbiotic Bacterium Actinomyces sp. Lu 9419.

Biosynthetic gene cluster of cetoniacytone A, an unusual aminocyclitol from the endosymbiotic Bacterium Actinomyces sp. Lu 9419.
复制标题

DOI:
10.1002/cbic.200800527
复制
发表时间:
2009-01-26
期刊:
影响因子:
3.2
通讯作者:
Mahmud, Taifo
Mahmud, Taifo
中科院分区:
生物学3区
文献类型:
--
作者:
Wu, Xiumei;Flatt, Patricia M.;Xu, Hui;Mahmud, Taifo

文献摘要

参考文献

被引文献

相似文献

在放线菌中鉴定出负责抗肿瘤剂 cetoniacytone A 生物合成的基因簇。 Lu 9419 菌株是一种从玫瑰金龟子甲虫 (Cetonia aurata) 肠道中分离出来的内共生细菌。 46 kb DNA 区域的核苷酸序列分析揭示了 31 个完整 ORF 的存在,包括预测编码 2-epi-5-epi-valiolone 合酶 (CetA)、乙二醛酶/博来霉素抗性蛋白 (CetB)、酰基转移酶 (CetD)、FAD 依赖性脱氢酶 (CetF2)、两种氧化还原酶 (CetF1 和CetG)、两种转氨酶(CetH 和 CetM)和一种吡喃糖氧化酶 (CetL)。 CetA 先前已被证明可催化景天庚酮糖 7-磷酸环化为环状中间体 2-epi-5-epi-valiolone。在本报告中,乙二醛酶/博莱霉素抗性蛋白同源物 CetB 被鉴定为 2-epi-5-epi-valiolone 差向异构酶 (EVE),它是邻位氧螯合物 (VOC) 超家族的新成员。发现 24 kDa 重组组氨酸标记的 CetB 形成同型二聚体;每个单体包含两个 βαβββ 支架,与两个组氨酸和两个谷氨酸残基形成金属结合位点。使用新分离的 cet 生物合成基因进行 BLAST 搜索,揭示了 Frankia alni ACN14a 基因组中的一组类似基因,表明这种植物共生固氮细菌能够产生与 cetoniacytones 相关的次级代谢产物。
A gene cluster responsible for the biosynthesis of the antitumor agent cetoniacytone A was identified in Actinomyces sp. strain Lu 9419, an endosymbiotic bacteria isolated from the intestines of the rose chafer beetle (Cetonia aurata). The nucleotide sequence analysis of the 46 kb DNA region revealed the presence of 31 complete ORFs, including genes predicted to encode a 2-epi-5-epi-valiolone synthase (CetA), a glyoxalase/bleomycin resistance protein (CetB), an acyltransferase (CetD), an FAD-dependent dehydrogenase (CetF2), two oxidoreductases (CetF1 and CetG), two aminotransferases (CetH and CetM), and a pyranose oxidase (CetL). CetA has previously been demonstrated to catalyze the cyclization of sedoheptulose 7-phosphate to the cyclic intermediate, 2-epi-5-epi-valiolone. In this report, the glyoxalase/bleomycin resistance protein homolog CetB was identified as a 2-epi-5-epi-valiolone epimerase (EVE), a new member of the Vicinal Oxygen Chelate (VOC) superfamily. The 24 kDa recombinant histidine-tagged CetB was found to form a homodimer; each monomer contains two βαβββ scaffolds that form a metal binding site with two histidine and two glutamic acid residues. BLAST search using the newly isolated cet biosynthetic genes revealed an analogous suite of genes in the genome of Frankia alni ACN14a, suggesting that this plant symbiotic nitrogen-fixing bacterium is capable of producing a secondary metabolite related to the cetoniacytones.
DOI: 10.1021/ja003643n
发表时间: 2001-03-28
影响因子: 15
作者:
Dong, HJ;Mahmud, T;Floss, HG
通讯作者: Floss, HG
DOI: 10.1107/s1744309104030659
发表时间: 2005-01-01
影响因子: 0.9
作者:
Holton, SJ;Dairou, J;Sim, E
通讯作者: Sim, E
DOI: 10.7164/antibiotics.51.570
发表时间: 1998-06-01
影响因子: 3.3
作者:
Cone, MC;Petrich, AK;Zabriskie, TM
通讯作者: Zabriskie, TM
DOI: 10.1021/bi700625p
发表时间: 2007-07-10
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Fillgrove, Kerry L.;Pakhomova, Svetlana;Armstrong, Richard N.
通讯作者: Armstrong, Richard N.
DOI: 10.1002/pro.5560070801
发表时间: 1998-08-01
期刊: PROTEIN SCIENCE
影响因子: 8
作者:
Bergdoll, M;Eltis, LD;Bolin, JT
通讯作者: Bolin, JT