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Chroococcidiopsis thermalis

ABSTRACT: A model for dessication tolerance

PROVIDER: PRJNA38135 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR3926540.fastq.gz	Fastqsanger.gz
	SRR3926541.fastq.gz	Fastqsanger.gz
	SRR3926539.fastq.gz	Fastqsanger.gz

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NanoLC-MS/MS DDA Chroococcidiopsis thermalis PCC 7203 thylkoids WL vs. FRL

Project description:Chroococcidiopsis thermalis is an extremophilic cyanobacterium that is adaptable to a widerange of environments including deserts, where it can maintain viability after desiccation. This species is also capable of photoautotrophic growth under far-red light (FRL, 750 nm) The proteomic comparison in this study, in conjunction with topographical imaging of thylakoid membranes by atomic force microscopy, supports earlier findings that FRL growth is accompanied by the synthesis of alternative photosynthesis-related proteins. Under white light (WL), a number of phycobilisome (PBS) and photosystem (PS) subunits were predominant at levels 2 - 14-fold greater compared to FRL growth. Two antenna family proteins were markedly more abundant under WL, with a fold-difference of approximately 80. While WL-associated proteins persisted at relatively low abundance under FRL, an exclusive set of PBS and PS subunit isoforms was expressed under FRL. These proteins were undetectable under WL, in many cases encoded in a discrete FRL-associated gene cluster. In line with the expected higher energy capture rate under WL, complexes associated with electron transport (eg. cytochrome b6f) and the ATP synthase were 1.2 – 3.4 times more abundant than under FRL.

2022-03-01 | PXD018129 | Pride

RNAseq on 1mm and 5 mm germinating seeds with/without PEG treatment from dissected radicles and cotyledons

Project description:RNAseq from Medicago truncatula early post germination (1 and 5mm radicle seeds) from dissected radicles and cotyledons with and without PEG treatment to identify genes induced during the reinduction of the desiccation tolerance at early germination. Dessication tolerant tissues were radicles from 1mm radicle seeds treated with PEG: R1P, and cotyledons from 1- and 5-mm radicle seeds treated or not with PEG: C1, C5, C1P, C5P and desiccation sensitive tissues were radicles from 1mm radicle seeds (R1) and 5mm radicle seeds (R5).

2022-10-03 | GSE214468 | GEO

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Integrative proteomic and physiological analyses of the molecular response to dessication-stress in Auricularia fibrillifera

Project description:Drought stress is one of the main factors influencing the growth and development of an organism. Auricularia fibrillifera has strong dessication resistance. In A. fibrillifera under dessication-stress, the melanin content of fruiting bodies elevated significantly by >10-fold compared with the control. Folate content also increased sharply but decreased significantly after rehydration, and amino acid and biotin levels increased by 40.11% and 22.14%, respectively. In proteomic analysis, 1,572 and 21 differentially abundant proteins (DAPs) were identified under dessication-stress and rehydration, respectively. A large number of DAPs were annotated in “amino acid metabolism,” “carbohydrate metabolism,” and “translation” pathways, and the DAPs related to osmotic regulation and antioxidant enzymes were significantly increased in abundance. Transcriptome-proteome association analysis showed that most DAPs (30) were annotated in the “biosynthesis of antibiotics” pathway. DAPs and corresponding differentially expressed genes were all up-regulated in the “biotin biosynthesis” pathway and associated with “folate biosynthesis” and “phenylalanine, tyrosine, and tryptophan biosynthesis.” In the analysis of protein–protein interactions, the DAPs annotated in the “phenylalanine, tyrosine, and tryptophan biosynthesis” pathway had the strongest interactions with other DAPs. These enriched pathways could enhance amino acid, folate, biotin, and melanin levels during desiccation stress, which is consistent with the physiological data (amino acid, folate, biotin, and melanin contents). In addition, many DAPs related to the cytoskeleton were significantly increased in abundance under dessication-stress. Physiological and transcriptome data were in agreement with proteomic results. This work provides valuable insight into the dessication-tolerant mechanisms of A. fibrillifera.

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