Project description:Ovarian follicle selection plays an important role in the reproduction of sexually mature hens, and this process can directly affect the growth and development of follicles until the final ovulation, thus affecting laying performance and fecundity of hens. In the laying hen ovary, one follicle from a cohort of 8-13 follicles of 6-8 mm in diameter is selected daily to enter the preovulatory hierarchy. In this study, we globally compared the proteomes of chicken ovarian follicles before and after follicle selection. A total of 5883 proteins were identified in the proteomes of chicken 6-8 mm prehierarchical follicles and 12-15 mm hierarchical follicles. 259 proteins are differentially expressed in 12-15 mm hierarchical follicle compared with prehierarchical follicle, of which 175 proteins are up-regulated and 84 proteins are down-regulated. The Gene Ontology enrichment of differentially expressed proteins revealed enriched GO terms for peptidase activity, acrosin binding for their molecular function and in the process of negative regulation of peptidase activity, and regulation of fertilization. The KEGG pathway analysis indicated that differentially expressed proteins were enriched for ribosome, lysine degradation, and endocytosis pathways. Nine differentially expressed proteins including vitellogenin-1 were validated with Parallel Reaction Monitoring (PRM) analysis, and their functions were discussed. This study provided a global proteomic view of the development of chicken ovarian follicles, which will serve as a foundation for understanding the molecular signatures and pathways of follicle selection in hens.
Project description:In this study, resistance of Klebsiella pneumoniae (K. pneumoniae) to PB was induced by passaging in serial concentrations of PB. This study employed TMT-labeled quantitative proteomics and LC-MS/MS metabolomics analysis to investigate the key biological processes associated with PB resistance in K. pneumoniae. A total of 315 differentially expressed proteins (DEPs) were identified, of which 133 were upregulated, and 182 were downregulated in the PB resistant K. pneumoniae. Metabolomics data demonstrated that 23 metabolites were significantly upregulated in PB resistant K. pneumoniae, 5 were downregulated.
Project description:We employed Non-standard quantitative techniques and quantitative proteomics techniques based on mass spectrometry to perform proteomics analyses for the petal abscission zone of rose petal at stage 3 stage 5. In total, 6595 proteins were detected, we compared differentially expressed proteins (DEPs) between stage 3 and stage 5 (FC>1.5, P-value<0.05). We found that 271 proteins were significantly up-regulated, while 444 proteins were significantly down-regulated.
Project description:Enterovirus 71 (EV71), a member of the Enterovirus genus in the Picornaviridae family, was first recognized as a dermotrophic virus that usually cause mild, self-limiting hand-foot-and-mouth disease (HFMD). However, EV71 infection can sometimes induce a variety of severe neurological complications, pulmonary edema and even death. Here, we aimed to provide an overview of proteomics characterization of EV71-infected brain and lung tissues.
Project description:Small peptides (sPeptides), a class of biological molecules of less than 100 amio acids encoded by small open reading frames (sORFs), play important roles in multiple biological process. Here, we conducted a comprehensive study using mRNA-seq, Ribo-seq, and Mass Spectrometry (MS) on six tissues (each with at least two replicates) of maize, set up a bioinformatic pipeline, and performed a genome-wide scan of sORFs and sPeptides in maize. Our study sets up a guildline for the genome-wide scan of sORFs and sPeptides in plants by integrating Ribo-seq, and MS data, provides a more comprehensive resource of functional sPeptides in maize, and sheds light on the complex biological system of plants in a new perspective.
Project description:In order to further explore the expression of proteins in RSV-infected macrophages, RSV type-L19 was used to stimulate RAW264.7 cells, and then mass spectrometry was conducted to detect the expression of different proteins after RSV infection. The results showed that there were different expression of proteins in RSV activated and inactive RAW264.7 cells.
Project description:Ionizing irradiation kills pathogens by destroying nucleic acids while retaining the immunogenicity of pathogen proteins. However, the overall proteome of bacteria exposed to X-ray irradiation still remain unclear. This experiment was aimed to investigate the proteome changes of the laboratory Pseudomonas aeruginosa PAO1 strain after exposure to X-ray irradiation. A total of 2963 proteins were identified in this study, of which 2599 proteins contained quantitative information. If the differential expression change threshold is 2 times, and the statistical test t-test p-value <0.05 is the significance threshold, then among the quantified proteins, the expression of 48 proteins was up-regulated and 8 protein expression was down-regulated. Based on the above data, we performed a systematic bioinformatics analysis of all identified proteins, and performed functional classification, functional enrichment, and clustering analysis based on functional enrichment for all differentially expressed proteins. Combined with the above information, it provides a reference direction for further investigation in the biological effect on P. aeruginosa PAO1 and its MV formation under X-ray irradiation.
Project description:Soil salinity is one of the major factors that limits area of cultivable land and yield potential of crops. Considered as a moderately salt sensitive economically-important crop, biological processes involved in salt stress response in peanut remain elusive. Publishing of the genomic sequence of cultivar peanut represent a new opportunity for further research. ABA INSENSITIVE 4 (ABI4) is an evolutionary conserved transcription factor. Mutation of ABI4 in Arabidopsis enhanced salt tolerance of seedlings significantly by targeting and down-regulating of HKT1;1. However, few achievements were reported in other aspects. In this study, AhABI4s in peanut were first cloned and silenced via virus-induced gene silencing method. Phenotype analysis showed that down-regulation of AhABI4s enhanced salt tolerance of peanut significantly. According to proteome and phosphoproteome analysis, expression of 1,900 proteins and 2,620 phosphorylation sites were predicted to be affected by silencing of AhABI4s under salt stress. Proteins with ion transporting activity were enriched by GO analysis. Further analysis showed that, 31 proteins may participate in homeostasis maintain of Na+, K+, Ca2+, H+ and Cl- in plant cells. Combined transcriptome and proteome analysis indicated that 63 genes may regulated by AhABI4s directly and 7 of them, ABI5-like5, RABA1f, SCAMP3, PK, RP-S26e, HSP70, cysteine proteinase inhibitor, were able to interact with the predicted ion transporters. Silencing of AhABI4s altered down-stream protein-protein interaction network to regulate expression/phosphorylation level of ion transporters, and finally influence homeostasis under salt stress. This work provides novel insights for salt response mechanism research and offer important evidence for protein function study.
Project description:Thermophilic fungi are eukaryotic species that grow at high temperatures, but little is known about the thermophily of thermophilic fungi. Here the proteome and N-glycoproteome of Chaetomium thermophilum at varying culture temperatures (30℃, 50℃, and 55℃) were studied using hydrophilic interaction liquid chromatography enrichment and high-resolution liquid chromatography–tandem mass spectroscopy analysis. In proteome, the numbers of differentially expressed proteins were 1274, 1374, and 1063 in T50/T30, T55/T30, and T55/T50, respectively. The up-regulated proteins were involved in biological processes, such as protein folding and carbohydrate metabolism. Most down-regulated proteins were involved in molecular functions, such as structural constituent of the ribosome and structural activity. For N-glycoproteome, the numbers of differentially expressed N-glycoproteins were 160, 176, and 128 in T50/T30, T55/T30, and T55/T50, respectively. The differential glycoproteins were mainly involved in various types of N-glycan biosynthesis, mRNA surveillance pathway, and protein processing in the endoplasmic reticulum. These results indicated that an efficient protein homeostasis pathway plays an essential role in the thermophily of C. thermophilum, and N-glycosylation is involved by affecting related proteins. This is the first study to reveal thermophilic fungi's physiological response to high-temperature adaptation using omics analysis, facilitating the exploration of the thermophily mechanism of thermophilic fungi.
Project description:The prognosis of liver cancer was inferior among tumors. New medicine treatments are urgently needed. In this study, a novel exopolysaccharide EPS364 was purified from Vibrio alginolyticus 364 which was isolated from South China Sea cold seep. Further research suggested that EPS364 consisted of mannose, glucosamine, gluconic acid, galactosamine, arabinose with a molar ratio of 5:9:3.4:0.8:1.5. The molecular weight of EPS364 was 14.8 kDa. Our results further indicated that EPS364 was β-linked and phosphorylated polysaccharide. Notably, EPS364 exhibited significant anti-tumor activity. Besides, EPS364 induced Huh7.5 cells apoptosis, collapse of mitochondrial membrane potential (MMP) and generation of reactive oxygen species (ROS). Proteomic and quantitative real-time PCR analyses indicated that EPS364 blocked cancer cell adhesion and induced apoptosis via targeting FGF19–FGFR4 signaling pathway. These findings suggested that EPS364 was a promising anti-tumor agent for pharmacotherapy.