The gut microbiome interacts with the host to maintain body homeostasis,with gut microbial dysbiosis implicated in many diseases.However,the underlying mechanisms of gut microbe regulation of host behavior and brain f...The gut microbiome interacts with the host to maintain body homeostasis,with gut microbial dysbiosis implicated in many diseases.However,the underlying mechanisms of gut microbe regulation of host behavior and brain functions remain unclear.This study aimed to elucidate the influence of gut microbiota on brain functions via post-translational modification mechanisms in the presence or absence of bacteria without any stimulation.We conducted succinylome analysis of hippocampal proteins in germ-free(GF)and specific pathogen-free(SPF)mice and metagenomic analysis of feces from SPF mice.These results were integrated with previously reported hippocampal acetylome and phosphorylome data from the same batch of mice.Subsequent bioinformatics analyses revealed 584 succinylation sites on 455 proteins,including 54 up-regulated succinylation sites on 91 proteins and 99 down-regulated sites on 51 proteins in the GF mice compared to the SPF mice.We constructed a panoramic map of gut microbiota-regulated succinylation,acetylation,and phosphorylation,and identified cross-talk and relative independence between the different types of post-translational modifications in modulating complicated intracellular pathways.Pearson correlation analysis indicated that 13 taxa,predominantly belonging to the Bacteroidetes phylum,were correlated with the biological functions of post-translational modifications.Positive correlations between these taxa and succinylation and negative correlations between these taxa and acetylation were identified in the modulation of intracellular pathways.This study highlights the hippocampal physiological changes induced by the absence of gut microbiota,and proteomic quantification of succinylation,phosphorylation,and acetylation,contributing to our understanding of the role of the gut microbiome in brain function and behavioral phenotypes.展开更多
基于巴斯德毕赤酵母表达系统探讨了屋尘螨过敏原Der p 1的重组表达与纯化。首先,采用毕赤酵母GS115表达密码子优化的全长编码基因PreProDer p 1,其产量可达100 mg/L,进一步共表达分子伴侣实现产量提高到140 mg/L,并实现3 L反应器发酵产...基于巴斯德毕赤酵母表达系统探讨了屋尘螨过敏原Der p 1的重组表达与纯化。首先,采用毕赤酵母GS115表达密码子优化的全长编码基因PreProDer p 1,其产量可达100 mg/L,进一步共表达分子伴侣实现产量提高到140 mg/L,并实现3 L反应器发酵产量提高到1 g/L。其次,对上述重组蛋白发酵液分别使用阳离子交换层析及亲和层析进行了纯化工艺优化,目的蛋白得率达到60.7%。本研究为后续PreProDre p 1诊断试剂盆的开发提供了参考。展开更多
基金supported by the Natural Science Foundation Project of China(81820108015,82201683)China Postdoctoral Science Foundation(2021M693926,2020TQ0393,2020M683634XB)+1 种基金Chongqing Science&Technology Commission(cstc2021jcyj-bshX0150,cstc2021jcyj-bshX0201)Special Funding for Chongqing Postdoctoral Research Projects(2021XMT001)。
文摘The gut microbiome interacts with the host to maintain body homeostasis,with gut microbial dysbiosis implicated in many diseases.However,the underlying mechanisms of gut microbe regulation of host behavior and brain functions remain unclear.This study aimed to elucidate the influence of gut microbiota on brain functions via post-translational modification mechanisms in the presence or absence of bacteria without any stimulation.We conducted succinylome analysis of hippocampal proteins in germ-free(GF)and specific pathogen-free(SPF)mice and metagenomic analysis of feces from SPF mice.These results were integrated with previously reported hippocampal acetylome and phosphorylome data from the same batch of mice.Subsequent bioinformatics analyses revealed 584 succinylation sites on 455 proteins,including 54 up-regulated succinylation sites on 91 proteins and 99 down-regulated sites on 51 proteins in the GF mice compared to the SPF mice.We constructed a panoramic map of gut microbiota-regulated succinylation,acetylation,and phosphorylation,and identified cross-talk and relative independence between the different types of post-translational modifications in modulating complicated intracellular pathways.Pearson correlation analysis indicated that 13 taxa,predominantly belonging to the Bacteroidetes phylum,were correlated with the biological functions of post-translational modifications.Positive correlations between these taxa and succinylation and negative correlations between these taxa and acetylation were identified in the modulation of intracellular pathways.This study highlights the hippocampal physiological changes induced by the absence of gut microbiota,and proteomic quantification of succinylation,phosphorylation,and acetylation,contributing to our understanding of the role of the gut microbiome in brain function and behavioral phenotypes.
文摘基于巴斯德毕赤酵母表达系统探讨了屋尘螨过敏原Der p 1的重组表达与纯化。首先,采用毕赤酵母GS115表达密码子优化的全长编码基因PreProDer p 1,其产量可达100 mg/L,进一步共表达分子伴侣实现产量提高到140 mg/L,并实现3 L反应器发酵产量提高到1 g/L。其次,对上述重组蛋白发酵液分别使用阳离子交换层析及亲和层析进行了纯化工艺优化,目的蛋白得率达到60.7%。本研究为后续PreProDre p 1诊断试剂盆的开发提供了参考。
