Phosphotransferase system of Streptococcus salivarius: characterization of the ptsH gene and its product.

Phosphotransferase system of Streptococcus salivarius: characterization of the ptsH gene and its product.
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唾液链球菌磷酸转移酶系统:ptsH 基因及其产物的表征。

DOI:
10.1016/0378-1119(93)90443-7
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发表时间:
1993
期刊:
影响因子:
3.5
通讯作者:
M. Frenette
M. Frenette
中科院分区:
生物学3区
文献类型:
--
作者:
G. Gagnon;C. Vadeboncoeur;M. Frenette

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唾液链球菌编码磷酸转移酶系统(PTS)含组氨酸磷酸载体蛋白(HPR)的HPR基因已被克隆和测序,并被发现是aptsH,ptsIoperon的一部分。在ptsH的上游,发现了可能的−35和−10盒,以及与大肠杆菌调控元件高度相似的Shine-Dalgarno序列。还观察到位于ptsH编码序列中的第二个启动子,该启动子足以表达该基因。唾液酸菌ptsI基因,编码PTSine的酶I。Coli[Gagnon等人,基因121(1992)71-78]。氨基酸序列OFS。从ptsH序列推断的唾液HPr与其他细菌的已知HPr的同源性在37%到76%之间。此外,这些。唾液中的HPr与烟曲霉的HPR样蛋白有78%的同源性,后者是一种不具有功能PTS的真核霉菌。表情分析OFS。唾液HPr。结果表明:(1)唾液链霉菌ptsHis表达。在自身启动子的控制下,(Ii)唾液链霉菌HPr合成了BYE。大肠埃希菌完全被蛋氨酸氨基肽酶处理,(Iii)唾液链球菌HPr在体内被磷酸化。此外,还观察到。Coli,pUC18轴承的拷贝数。与没有插入的pUC18相比,唾液ptsH减少了25倍以上。
TheStreptococcus salivariusptsHgene encoding histidine-containing phosphocarrier protein (HPr) of the phosphotransferase system (PTS) has been cloned, sequenced, and found to be part of aptsH,ptsIoperon. Upstream fromptsH, putative −35 and −10 boxes and a Shine-Dalgarno sequence highly similar to theEscherichia coliconsensus regulatory elements were identified. A second promoter, located in theptsHcoding sequence was also observed and is sufficient for the expression of theS. salivarius ptsIgene, encoding enzyme I of the PTS inE. coli[Gagnon et al., Gene 121 (1992) 71–78]. The amino acid sequence ofS. salivariusHPr, inferred from theptsHsequence, shared identity varying between 37 and 76% with known HPr from other bacteria. Moreover, theS. salivariusHPr shared 78% identity with an HPr-like protein ofAspergillus fumigatus, a eukaryotic mold that does not possess a functional PTS. Expression analysis ofS. salivariusHPr inE. colidemonstrated that (i)S. salivarius ptsHis expressed inE. coliunder the control of its own promoter, (ii)S. salivariusHPr synthesized byE. coliis completely processed by methionine aminopeptidase, and (iii)S. salivariusHPr is phosphorylated in vivo byE. colienzyme I. It was also observed that, inE. coli, the copy number of pUC18 bearingS. salivarius ptsHwas reduced more than 25-fold, as compared to pUC18 without an insertion.
pts 操纵子上游两个启动子的证据:cAMP 受体蛋白调节复合物的调节。
DOI: 10.1073/pnas.89.15.7056
发表时间: 1992
影响因子: 11.1
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HPr(革兰氏阳性菌中磷酸转移酶系统的磷酸载体蛋白)的代谢敏感、ATP 依赖性、蛋白激酶催化的磷酸化。
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发表时间: 1990
影响因子: 16.6
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定量测定口腔链球菌生长细胞中各种形式 HPr 的细胞内浓度,HPr 是磷酸烯醇丙酮酸的磷酸载体蛋白:糖磷酸转移酶系统。
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发表时间: 1991
影响因子: 2.9
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DOI: --
发表时间: 1987
期刊: The Journal of biological chemistry
影响因子: --
作者:
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