PXD032845-1

PXD032845 is an original dataset announced via ProteomeXchange.

Title	Proteases in Quercus ilex seeds
Description	Proteases and protease inhibitors have been analyzed in the non-orthodox Quercus ilex forest tree by using in silico and wet approaches. The in silico analysis showed that the species-specific transcriptome database included 2240 and 97 transcripts annotated as, respectively, proteases and protease inhibitors, with members of the different families according to the MEROPS protease database (http://www.merops.ac.uk) classification, mostly of serine- and metallo-type. Data for Q. ilex are compared with those previously published for other Quercus species, namely, Q. suber, Q. lobata, and Q. robur. A second approach was performed to assess the evolution of proteases and protease inhibitors along with seed germination in cotyledon and embryo tissues by determining changes at proteomics and activity levels, the last by mean of in vitro and in gel assays. Shotgun (LC-MSMS) analysis of acorn embryos and cotyledons of three developmental stages (NV, non-viable; T1, mature; and T3 germinated) allowed the identification of a total of 177 proteases and 12 protease inhibitors. In vitro protease activity was determined by using azocasein as substrate; the total activity was higher in cotyledons than embryos, showing the latter significant differences throughout germination. Gel protease activity assays showed common and differential bands between tissues and developmental stages. Shotgun analysis of 10 differential activity bands supported the results obtained from the whole proteome analysis, with some proteins highly represented in the same tissues and stages by both strategies. In overall, the combination of shotgun proteomics and protease activity approaches allowed the identification of tissue-specific (such as cysteine protease inhibitors), and stage-specific proteins (such as those related to storage proteins mobilization), with others being present in all the analyzed organs. Some of the proteases and protease inhibitors differentially identified between tissues and stages in this study could be used as indicators of seed quality and viability.
HostingRepository	PRIDE
AnnounceDate	2022-08-12
AnnouncementXML	Submission_2022-08-11_16:17:14.623.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Maria Angeles Castillejo
SpeciesList	scientific name: Quercus ilex; NCBI TaxID: 58334;
ModificationList	No PTMs are included in the dataset
Instrument	LTQ Orbitrap

Revision	Datetime	Status	ChangeLog Entry
0	2022-03-27 05:48:29	ID requested
⏵ 1	2022-08-11 16:17:15	announced

Escand, ó, n M, Bigatton ED, Guerrero-S, á, nchez VM, Hern, á, ndez-Lao T, Rey MD, Jorr, í, n-Novo JV, Castillejo MA, . Front Plant Sci, 13():907042(2022) [pubmed]

submitter keyword: Protease, protease inhibitors, non-orthodox seed, germination, Quercus ilex, proteomics, protease activity

María Angeles Castillejo Sanchez
contact affiliation	Agroforestry and Plant Biochemistry, Proteomics and Systems Biology, Department of Biochemistry and Molecular Biology, University of Cordoba, UCO-CeiA3, 14014 Córdoba, Spain
contact email	bb2casam@uco.es
lab head
Maria Angeles Castillejo
contact affiliation	University of Cordoba
contact email	bb2casam@uco.es
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD032845
     1. Label: PRIDE project
     2. Name: Proteases in Quercus ilex seeds