Aging proteomics repository / PXD014274

Proteomic and unbiased post-translational modification profiling of amyloid plaques and surrounding tissue in a transgenic mouse model of Alzheimer’s disease

PXD014274 · PRIDE record

Generated summary PXD014274 is a DDA label-free dataset (Mus musculus) with 38 runs, 38 samples and no enrichment step (whole proteome). It was reanalysed with MetaMorpheus 1.1.12. At 1% FDR the search reports 116,639 PSMs, 6,415 peptidoforms and 1,318 protein groups, and the repository holds 7,280 PTM sites for it. 8 open warnings about it are recorded.
Written from catalog fields only (D17), with no model involved. It says nothing the tables below do not.

Open findings

Recorded against this dataset: 0 errors, 8 warnings and 5 for information

count_mismatch warning
The bundle holds 6416 where the producer reported 6415 (results.txt: All target peptides with q-value <= 0.01). Both numbers are kept; treat the producer's as canonical until the difference is explained.
count_mismatch warning
The bundle holds 116639 where the producer reported 116638 (results.txt: All target PSMs with q-value <= 0.01 (pxreprise:DEF-PSM-1PCT v1)). Both numbers are kept; treat the producer's as canonical until the difference is explained.
high_contamination warning
61.81% of protein intensity in the worst file, 22.57% median across 38 files (DEF-QC-9 v3.5)
low_core_use warning
14.41 avg cores of 32 allowed (S5)
occupancy_not_stored warning
Of 40330 occupancy entries MetaMorpheus wrote, some are not in ptm_stoichiometry: 72 duplicate entry for one site and run (identical values; same protein group); 1709 site not in ptm_sites. 'site not in ptm_sites' means the entry's site has no ptm_sites row to key on; 'not determinable' means a cell's segments could not be assigned to its accessions from the sequences (QuantProject DEF-OCC-ACCESSION), which is never guessed. Absence of a row for these sites is therefore not NA. A 'duplicate' is a second entry for a (site, run) that already has a row: one with identical values loses nothing; one with DIFFERENT values means MetaMorpheus wrote two answers and the first in file order was stored (examples in bundle.json occupancy.differing_duplicates; which one should be stored is QuantProject's to define).
sdrf_partial warning
The SDRF was used only for the runs it names that were searched: it names no row for 6 searched run(s), each given a synthetic sample with no annotation: Lib1, Lib1_2, Lib2, Lib2_2, Lib3, Lib3_2. sdrf_status is `partial`.
sdrf_uncoded warning
The deposited SDRF describes its samples only as text with no ontology term, so the curated organism part, cell type, disease and individual columns are empty. The text is in sample_characteristics: disease: Alzheimer disease, normal; organism part: hippocampal formation. Match on it as text; it has not been mapped to a term.
unplaced_ptm_sites warning
Some modifications on peptides shared between proteins were not written to ptm_sites for one or more of those proteins, because the peptide could not be located in that protein's sequence and the producer's residue spans cannot be paired with its accessions. Of the (PSM, protein) pairs affected: 1069 named a protein that does not contain the stored peptide -- typically a PSM ambiguous between peptide sequences (level 4 or 5), where this protein carries a different candidate than the first, which is the one stored. Sites on the other proteins of the same PSMs are written. Counts are in bundle.json under protein_databases.
collapsed_duplicate_rows info
The producer wrote some rows more than once, identical in every column, and the copies were dropped so each identifier appears once. Nothing was lost: the kept row is byte-for-byte what the duplicates said. Rows that share an identifier and disagree anywhere are still refused rather than collapsed. protein_groups: 1 identifier(s), 3 row(s) dropped, e.g. PXD014274:D3Z748;F6WRP6;K9J7B2;P70691;Q62452;Q63886;Q64435;Q6ZQM8 written 4 times; quant_values: 38 identifier(s), 114 row(s) dropped, e.g. PXD014274:Lib1:label_free:protein_group:PXD014274:D3Z748;F6WRP6;K9J7B2;P70691;Q62452;Q63886;Q64435;Q6ZQM8:QuantProject:DEF-PROT-SPC written 4 times. The full list is in bundle.json under collapsed_duplicates.
excluded_from_search info
The deposited file Tg1_L_Ctr.raw was left out of the search, so it has no run row, no PSMs and no quantities here. Producer's reason: D52: failed qc_spectra on too_few_ms2 (a blank or failed injection); excluded with a record instead of dropping the deposit. Deposited sha256: 9aee7c1c25203eea5183b484ac6a34ed598d4c17297061e547bdc6f5c8baeaeb.
excluded_from_search info
The deposited file Tg1_R_Ctr.raw was left out of the search, so it has no run row, no PSMs and no quantities here. Producer's reason: D52: failed qc_spectra on too_few_ms2 (a blank or failed injection); excluded with a record instead of dropping the deposit. Deposited sha256: 799b6a4a8c8a51996b20a4818a3d255751ab52843b75a9122462390cd99ab0db.
excluded_from_search info
The deposited file Tg2_L.raw was left out of the search, so it has no run row, no PSMs and no quantities here. Producer's reason: D52: failed qc_spectra on too_few_ms2 (a blank or failed injection); excluded with a record instead of dropping the deposit. Deposited sha256: 6fae6fb43a7a8b199abdabb24fb944077fb5d893b05d5b15b3381f808020b2eb.
occupancy_decoy_groups info
99 occupancy entries on decoy protein groups were not stored: MetaMorpheus computes them, and they are FDR machinery, not biology.

What was found

PSMs at 1% FDR116,639
Peptidoforms at 1% FDR6,415
Protein groups at 1% FDR1,318
PTM sites7,280
Quantitative values261,672
PSMs, all (including decoys and sub-threshold)239,892
MS2 identification rate (pxreprise:DEF-ID-RATE)29.1%
Contaminant share of PSMs (pxreprise:DEF-CONTAM-PSM)42.6%

How it was measured

Organism searched
Mus musculus (the protein database's organism, not a statement about the samples)
Acquisition
DDA
Quantification
label_free
Labelling
none
Enrichment
none
Instrument vendor
Thermo
Runs / samples
38 / 38
Sample metadata
partial
Search engine
MetaMorpheus 1.1.12
Protein database
UP000000589_all_genecentric_2026_03_agingPTM-v3.xml
Pipeline commit
a086cd029e63

Modifications

Search engine's nameUNIMODSites
Carbamidomethyl on CUNIMOD:41,053
Oxidation on MUNIMOD:35971
Deamidation on QUNIMOD:7883
Deamidation on NUNIMOD:7799
Citrullination on RUNIMOD:7259
Hydroxylation on PUNIMOD:35215
Ammonia loss on NUNIMOD:385155
Sodium on EUNIMOD:30135
Hydroxylation on NUNIMOD:35131
Magnesium on EUNIMOD:956126
Sodium on DUNIMOD:30113
Hydroxylation on KUNIMOD:3586
Magnesium on DUNIMOD:95686
Calcium on DUNIMOD:95174
Calcium on EUNIMOD:95173
Methylation on KUNIMOD:3469
Carbamyl on XUNIMOD:567
Phosphoserine on SUNIMOD:2157
Carbamyl on MUNIMOD:555
Hydroxybutyrylation on K—52
Acetylation on KUNIMOD:147
Methylation on RUNIMOD:3446
Carboxylation on EUNIMOD:29942
Dimethylation on KUNIMOD:3642
N-acetylalanine on AUNIMOD:141
Carboxylation on DUNIMOD:29938
Nitrosylation on YUNIMOD:35438
Potassium on DUNIMOD:53031
Carboxylation on KUNIMOD:29930
Trimethylation on KUNIMOD:3730
GG (Ubiquitination Site) on KUNIMOD:12128
Carbamyl on RUNIMOD:527
Butyrylation on KUNIMOD:128926
Acetylation on XUNIMOD:125
Dimethylation on RUNIMOD:3624
Malonylation on KUNIMOD:74724
Formylation on KUNIMOD:12222
Carbamyl on KUNIMOD:521
Phosphorylation on SUNIMOD:2121
Potassium on EUNIMOD:53021
N6-acetyllysine on KUNIMOD:118
Ammonia loss on CUNIMOD:38517
Crotonylation on KUNIMOD:136317
Glutarylation on KUNIMOD:184815
HexNAc on TUNIMOD:4315
N-acetylserine on SUNIMOD:115
Succinylation on KUNIMOD:6415
Fe[II] on EUNIMOD:95211
Phosphorylation on TUNIMOD:2111
Phosphothreonine on TUNIMOD:2110
HexNAc on SUNIMOD:439
N6-methyllysine on KUNIMOD:348
Water Loss on EUNIMOD:278
Fe[III] on DUNIMOD:18707
Fe[II] on DUNIMOD:9527
Carbamyl on CUNIMOD:56
N6,N6,N6-trimethyllysine on KUNIMOD:375
Phosphotyrosine on YUNIMOD:215
Deamidated asparagine on NUNIMOD:74
N-acetylmethionine on MUNIMOD:14
N6-succinyllysine on K—4
Nitrosylation on CUNIMOD:2754
Omega-N-methylarginine on RUNIMOD:344
Phosphorylation on YUNIMOD:214
Sulfonation on YUNIMOD:404
Fe[III] on EUNIMOD:18703
N-acetylthreonine on TUNIMOD:13
N6-(2-hydroxyisobutyryl)lysine on KUNIMOD:18493
3'-nitrotyrosine on Y—2
4-hydroxyproline on PUNIMOD:352
5-glutamyl glycerylphosphorylethanolamine on EUNIMOD:3962
N-acetylglycine on GUNIMOD:12
N-acetylvaline on VUNIMOD:12
N-myristoyl glycine on GUNIMOD:452
N6,N6-dimethyllysine on KUNIMOD:362
Tele-methylhistidine on HUNIMOD:342
Citrulline on RUNIMOD:71
N-acetylaspartate on DUNIMOD:11
N-acetylglutamate on EUNIMOD:11
N6-malonyllysine on K—1
S-palmitoyl cysteine on CUNIMOD:471

Every modification with a site on a target protein, most frequent first. A dash in the UNIMOD column means the modification has no UNIMOD term in the registry that searched it, not that it is unknown. One chemistry can appear under two names (UniProt's and MetaMorpheus's); the catalog's ptm_sites_by_chemistry view merges them.

Data

The Parquet files for this dataset are not published yet.

Bundle
554d3bb13e935f75, written 2026-10-29T09:24:00+00:00 by ingester 1.4.0
Reconciliation
failed: psms_target_1pct, peptidoforms_target_1pct (the bundle disagrees with the producer's own count here)
Licence
CC-BY-4.0
Credit
NCEMS Aging Proteome Working Group