PXD011023-2

PXD011023 is an original dataset announced via ProteomeXchange.

Title	Heat and pressure resistance relates to protein folding and aggregation
Description	The locus of heat resistance (LHR) confers extreme heat resistance in E. coli. This study explored the role of the LHR in pressure resistance of E. coli, as well as its relationship with protein folding and aggregation in vivo. The role of LHR was investigated in E. coli MG1655 expressing a ibpA-yfp fusion. The expression of proteins by the LHR was determined by mass spectrometry based proteomics; inclusion bodies of untreated and treated cells were also analysed by proteomics, and by observation with fluorescence microscope. In total, 11 proteins of LHR were expressed, including sHSP20, ClpKGI, sHSP, YdfX1 and YdfX2, HdeD, KefB, Trx, PsiE, DegP, and a hypothetical proteins. The proteomic analysis of inclusion bodies revealed a differential abundance of proteins related to oxidative stress in strains carrying the LHR. The LHR reduced the presence of inclusion bodies after heat or pressure treatment, indicating that proteins expressed by the LHR prevent or reverse protein aggregation. The phenotype of the LHR was also mediated by the expression of a fragment containing only sHSP20, ClpKGI, sHSP. The LHR and the fragment encoding only for sHSP20, ClpKGI, sHSP also enhanced pressure resistance in E. coli MG1655 but had no effect on pressure resistance of E. coli LMM1010. In conclusion, the LHR confers pressure resistance to some strains of E. coli, and reduces protein aggregation. Pressure and heat resistance, however, are also dependent on additional LHR-encoded functions.
HostingRepository	PRIDE
AnnounceDate	2024-10-22
AnnouncementXML	Submission_2024-10-22_04:48:37.709.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Stephanie Wilhelm
SpeciesList	scientific name: Escherichia coli; NCBI TaxID: 562;
ModificationList	iodoacetamide derivatized residue
Instrument	LTQ Orbitrap Velos

Revision	Datetime	Status	ChangeLog Entry
0	2018-09-06 05:58:41	ID requested
1	2020-01-27 07:40:55	announced
⏵ 2	2024-10-22 04:48:38	announced	2024-10-22: Updated project metadata.

Dataset with its publication pending

curator keyword: Biological

submitter keyword: food preservation,Escherichia coli, pressure resistance, inclusion bodies

BayBioMS Bavarian Center for Biomolecular Mass Spectrometry
contact affiliation	Technical University of Munich TUM School of Life Scienes Weihenstephan Freising, Germany
contact email	stephanie.heinzlmeir@tum.de
lab head
Stephanie Wilhelm
contact affiliation	Chair of Proteomics and Bioanalytics, Technische Universität München, Germany
contact email	stephanie.heinzlmeir@tum.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD011023
     1. Label: PRIDE project
     2. Name: Heat and pressure resistance relates to protein folding and aggregation