PXD000401

PXD000401 is an original dataset announced via ProteomeXchange.

Title	Human CSF LC-MS
Description	For the blood contamination studies a CSF pool was made with 1mL CSF free of blood from n=4 patients. The pool was divided into four aliquots. One aliquot was kept as reference CSF without added blood (named “neat” in the raw files), one was spiked with 20 µL blood/mL CSF (2%) (“20S”) and two were spiked with 5 µL blood/mL CSF (0.5%) (named “5S” and “5U”, S=centrifuged, U=not centrifuged). The sample spiked with 2% blood and one of the samples spiked with 0.5% blood were centrifuged at 4C at 400 x g for 10 minutes. In one experiment (BloodContamination_GeLC-MS_comb1-10) the reference CSF (neat), and 0.5% centrifuged (5S) and 2% centrifuged (20S) were protein depleted using the MARS Hu-14 column, separated by SDS-PAGE into ten fractions and in-gel digested. The samples (30 in total) were analysed by LC-MS on an OrbiTrap Velos Pro online coupled to a Dionex Ultimate 3000 nano RSLC system. The data was analysed by the Progenesis LC MS software 2.7 (Nonlinear Dynamics), and the MS/MS spectra were searched against UniProt/SwissProt using the open-source graphical user interface SearchGUI (version 1.7.3), with search engines OMSSA and X!Tandem. PeptideShaker (version 0.14.7) was used to assemble the peptides into proteins. The raw files were named according to sample and fraction, e.g. the first fraction of the reference CSF was called “BK_GeLC_neat_F1”, and the second fraction was called “BK_GeLC_neat_F2”. In the second blood contamination study the reference CSF (neat), and the 0.5% blood spiked samples centrifuged (5S) and not centrifuged (5U) were trypsin digested by in solution protocol and analysed using the same instruments as in the first study. (In the search output file are also the results for 2% blood spiked with and without centrifugation, 20S and 20U, but since the data was not used, the raw files are not distributed). The raw files were named “BK_Insol_FD_X” (X = neat, 5S or 5U). In the third experiment we examined the rostro-caudal gradient (RCG) on CSF in the spinal cord by sampling the 1st, 10th, 16th, 24th, 31st, 38th and 44th mL CSF in volumes of approximately 1 mL of a PSP patient during lumbar puncture. The CSF was centrifuged at 2000 x g for 10 min. We did an iTRAQ discovery study, and to be able to compare all seven RCG points, three related iTRAQ experiments (RCG exp 1, 2 and 3) were done. In each related experiment we included an identical reference which we labeled with the iTRAQ 114 reagent. The reference sample contained equal volumes of the seven RCG points, and was used as the reference in the data analysis. In the experiment we had twelve samples (equal volume) that were digested and labeled with iTRAQ reagents according to the vendor’s manual. The samples were combined into three related experiments as follows: Exp. 1 (common reference, 44th mL, 24th mL and 1st mL), Exp. 2 (common reference, 1st mL, 38th mL and 16th mL), and Exp. 3 (common reference, 10th mL, 44th mL and the 31st mL). The 1st and 44th mL were included twice, since they were expected to be the most different samples. The three combined samples (RCG exp 1, 2 and 3) were fractionated into 21 fractions using mixed mode reversed phase-anion chromatography (MM (RP-AX)). Fractions 1-4 were excluded from LC-MS analysis and the two latest fractions were combined before analysis on an Orbitrap Velos Pro, resulting in 16 fractions per combined sample. The raw files were named according to experiment (RCG 1, 2 or 3) and number of fraction (F4-F19), e.g. the raw file by the name EA_RCG3_F15 is fraction 15 from RCG experiment 3.
HostingRepository	PRIDE
AnnounceDate	2014-07-25
AnnouncementXML	Submission_2014-07-25_01:31:08.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Elise Aasebo
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	monohydroxylated residue; iodoacetamide derivatized residue; iTRAQ4plex-116 reporter+balance reagent acylated residue
Instrument	LTQ Orbitrap Velos

Revision	Datetime	Status	ChangeLog Entry
0	2013-08-06 01:25:31	ID requested
1	2014-02-13 07:41:25	announced
⏵ 2	2014-07-25 01:31:08	announced	Updated project metadata.

Dataset with its publication pending

submitter keyword: Human, CSF, blood contamination, RCG, OrbiTrap Velos Pro, GeLC-MS, label free, iTRAQ

Elise Aasebo
contact affiliation	PROBE
contact email	elise.aasebo@biomed.uib.no
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2014/02/PXD000401

PRIDE project URI

• PRIDE
  1. PXD000401
     1. Label: PRIDE project
     2. Name: Human CSF LC-MS