Structural basis of AimP signaling molecule recognition by AimR in Spbeta group of bacteriophages
Structural basis of AimP signaling molecule recognition by AimR in Spbeta group of bacteriophages
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Spbeta噬菌体中AimR识别AimP信号分子的结构基础
DOI:
10.1007/s13238-018-0588-6
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发表时间:
2018-11
期刊:
影响因子:
--
通讯作者:
Ouyang Songying
中科院分区:
文献类型:
--
作者:
Zhen Xiangkai;Zhou Huan;Ding Wei;Zhou Biao;Xu Xiaolong;Perčulija Vanja;Chen Chun-Jung;Chang Ming-Xian;Choudhary Muhammad Iqbal;Ouyang Songying
Quorum sensing (QS) is a widespread phenomenon in bacteria which enables them to participate in cell-to-cell communication by producing and responding to small signal molecules, thus synchronously altering their behavior depending on population density (Singh et al., 2000; Miller and Bassler, 2001). Through QS, bacteria coordinate processes such as expression of virulence factors (Slamti and Lereclus, 2002), biofilm formation (Parashar et al., 2011), sporulation (Perego et al., 1996), conjugation (Kozlowicz et al., 2006), antibiotic synthesis (Miller and Bassler, 2001; Whiteley et al., 2017) etc.In Gram-positive bacteria, QS is mainly controlled by a family of cytosolic peptide-sensing regulators known as RRNPP, which is named for its representative members, ie, Rap, Rgg, NprR, PlcR and PrgX. The reported structures of RRNPP members (Parashar et al., 2011; Gallego del Sol and Marina, 2013; Parashar et al., 2013) show a two-domain structure with an N-terminal helix-turn-helix (HTH) motif DNA-binding domain (DBD), a C-terminal tetratricopeptide repeat (TPR) domain containing the elements for signal peptide binding and oligomerization, and a short linker helix connecting the two domains. Despite the conserved tertiary structure of these regulators, structural analyses reveal unexpected diversity in the mechanism of activation and molecular strategies that couple the peptide-induced allostery to gene expression (Do and Kumaraswami, 2016). Remarkably, a recent report described the use of a QS system for regulation of entry into lytic or lysogenic cycle by the Bacillus-infecting temperate phages phi3T and SPbeta (Erez et al., 2017). This system, termed arbitrium, is reminiscent of RRNPP-mediated QS found in Gram-positive bacteria, and is the first known example of QS in bacteriophages. The arbitrium system comprises three phage genes:(1) AimP, encoding the peptide that is processed into a 6 aa signaling peptide extracellularly,(2) AimR, encoding the intracellular receptor of AimP that is predicted to be structurally similar to RRNPP regulators (Fig. 1 A), and (3) AimX, encoding a putative long non-coding DNA that functions as the negative regulator of lysogeny (Erez et al., 2017). During
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影响因子:
3.6
作者:
Kozlowicz, Briana K.;Shi, Ke;Dunny, Gary M.
通讯作者:
Dunny, Gary M.
影响因子:
11.4
作者:
Slamti, L;Lereclus, D
通讯作者:
Lereclus, D
影响因子:
64.8
作者:
Erez Z;Steinberger-Levy I;Shamir M;Doron S;Stokar-Avihail A;Peleg Y;Melamed S;Leavitt A;Savidor A;Albeck S;Amitai G;Sorek R
通讯作者:
Sorek R
影响因子:
9.8
作者:
Parashar V;Mirouze N;Dubnau DA;Neiditch MB
通讯作者:
Neiditch MB
影响因子:
9.8
作者:
Gallego del Sol F;Marina A
通讯作者:
Marina A