{"database":"Pride","file_versions":[{"headers":{"Content-Type":["application/json"]},"body":{"files":{"Txt":["ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD073484/checksum.txt"],"Csv":["ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD073484/F300635-minusRNA.csv","ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD073484/F300634-plusRNA.csv"],"Raw":["ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD073484/20250821_DSquair_SV_119966_04_plusRNA.raw","ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD073484/20250821_DSquair_SV_119966_03_minusRNA.raw"]},"type":"primary"},"statusCode":"OK","statusCodeValue":200}],"scores":null,"additional":{"labhead_mail":["s.s.virdee@dundee.ac.uk"],"submitter":["Satpal Virdee"],"technology_type":["Data-dependent acquisition","Mass Spectrometry"],"software":[""],"submitter_keywords":["Znfx1 ubiquitin chains"],"full_dataset_link":["https://www.ebi.ac.uk/pride/archive/projects/PXD073484"],"sample_protocol":["or 1 h at room temperature with gentle mixing. Beads were washed sequentially with PBS, 0.2% (w/v) SDS in PBS, 6 M urea, and 1.5 M urea in 100 mM triethylammonium bicarbonate (TEAB, pH 8.0). Bound proteins were reduced with 10 mM dithiothreitol for 30 min at 37 °C, alkylated with 10 mM iodoacetamide in the dark, and quenched with 10 mM dithiothreitol prior to dilution in TEAB.  Proteins were digested overnight at 37 °C using sequencing-grade trypsin. Peptides were acidified to 1% trifluoroacetic acid and desalted using C18 MiniSpin cartridges. After washing with 0.1% TFA, peptides were eluted in 100% acetonitrile containing 0.1% TFA, dried under vacuum, and resuspended in 5% formic acid for LC–MS/MS analysis. Peptides were analysed using a Dionex Ultimate 3000 RSLC Nano system coupled to an Orbitrap Lumos mass spectrometer. Samples were loaded onto C18 trap columns and separated on an EASY-Spray C18 analytical column using a segmented acetonitrile gradient. Data were acquired using data-dependent acquisition."],"repository":["Pride"],"modification":[""],"quantification_method":[""],"data_protocol":["LC–MS/MS data were searched using Mascot to identify GlyGly-modified lysine residues resulting from tryptic digestion of ubiquitinated proteins. Only rank-1 GlyGly-modified peptide identifications were considered. Spectral counts corresponding to individual GlyGly-modified lysines were used as a qualitative proxy for ubiquitin chain linkage abundance.  No quantitative normalisation or statistical hypothesis testing was performed. Linkage preferences are presented as qualitative trends only. Analyses were performed from a single mass spectrometry acquisition."],"omics_type":["Proteomics"],"labhead":["Satpal Virdee"],"instrument_platform":[""],"labhead_affiliation":["MRC Protein phosphorylation unit, University of Dundee"],"submission_type":["PARTIAL"],"species":["Homo Sapiens (human)"],"publication":["41861786 Squair DR, Rivers E, Sowar H, Balci A, Harmo R, Wright DJ, Beniwal G, Soetens M, Mathur S, Tollervey A, Wood NT, Pao KC, Stanton C, Fletcher AJ, Virdee S. ZNFX1 uses two-component ubiquitin circuitry to quarantine viral RNA. Mol Cell. 2026 86(6):1164-1181.e12 10.1016/j.molcel.2026.02.015"],"submitter_mail":["s.s.virdee@dundee.ac.uk"],"submitter_affiliation":["University of Dundee"],"submitter_country":["United Kingdom"],"pubmed_abstract":["The detection of viral RNA inside cells triggers a diverse range of antiviral responses, including global translation inhibition, interferon secretion, and RNA sequestration. Mutations in the gene zinc-finger NFX1-type containing 1 (ZNFX1) cause severe pediatric immunodeficiencies, including chronic viral infection and autoinflammation. Here, we show that ZNFX1 is an RNA helicase with cryptic and unusual bifurcating E3 ubiquitin ligase activity. Nucleotide-dependent RNA binding stimulates ZNFX1 to generate complex ubiquitin chains via a two-component ubiquitin circuit wired in parallel, with ubiquitin flux occurring via two competing paths. One route produces K63-linked polyubiquitin that drives RNA entrapment within self-propagating ZNFX1 aggregates, and the other route produces K48-linked polyubiquitin that drives ZNFX1 turnover. RNA entrapment restricts RNA virus replication and is reversible by deubiquitination. Pathogenic ZNFX1 variants are defective for viral restriction, linking RNA entrapment to antiviral immunity in vivo."],"pubmed_title":["ZNFX1 uses two-component ubiquitin circuitry to quarantine viral RNA."],"pubmed_authors":["Squair Daniel R DR, Rivers Eilidh E, Sowar Hanna H, Balci Arda A, Harmo Roosa R, Wright David J DJ, Beniwal Gaurav G, Soetens Mathieu M, Mathur Sunil S, Tollervey Aidan A, Wood Nicola T NT, Pao Kuan-Chuan KC, Stanton Callum C, Fletcher Adam J AJ, Virdee Satpal S"],"additional_accession":[]},"is_claimable":false,"name":"Ubiquitin diGly site ampping on ZNFX1 autoubiquitination reactions","description":"This experiment aimed to characterise ubiquitin chain linkage preferences generated and autoubiquitination sistes during ZNFX1 E3 reactions using diGly remnant mass spectrometry. GlyGly-modified lysine residues were identified as a qualitative proxy for ubiquitin linkage types. Spectral counts of rank-1 GlyGly-modified peptides were used to infer relative linkage abundance. Data interpretation was qualitative in nature, with no quantitative normalisation or statistical comparison applied.","dates":{"publication":"2026-05-22","submission":"2026-01-23"},"accession":"PXD073484","cross_references":{"TAXONOMY":["NEWT:6945","NEWT:184922","NEWT:3555","NEWT:2","NEWT:157546","NEWT:35554","NEWT:38942","NEWT:307972","NEWT:32046","NEWT:544496","NEWT:2042546","NEWT:45351","NEWT:43179","NEWT:4513","NEWT:5722","NEWT:55153","NCBITaxon:10407","NEWT:1736309","NEWT:309800","NEWT:1211601","NEWT:876138","NEWT:3654","NEWT:237561","NEWT:5833","NEWT:6928","NEWT:10036","NEWT:36745","NEWT:1351","NEWT:1438992","NEWT:2649997","NEWT:272563","NEWT:224326","NCBITaxon:79857","NEWT:1096976","NEWT:95648","NEWT:3885","NEWT:3888","NEWT:1589","NEWT:135622","NCBITaxon:4896","NEWT:6915","NEWT:3649","NEWT:101510","NEWT:3880","NEWT:272559","NEWT:3641","NEWT:383379","NEWT:466585","NEWT:10029","NEWT:913645","NEWT:1000589","NEWT:85963","NEWT:85962","NEWT:317447","NEWT:7955","NEWT:7959","NEWT:2261","NEWT:31156","NEWT:398580","NEWT:4565","NEWT:1264690","NEWT:515619","NEWT:192875","NEWT:34305","NEWT:59729","NCBITaxon:183674","NEWT:224308","NEWT:84645","NEWT:626528","NEWT:139927","NEWT:4558","NEWT:209285","NEWT:5888","NEWT:1283","NEWT:931281","NEWT:4550","NEWT:1000561","NEWT:197","NEWT:1390363","NEWT:288705","NCBITaxon:79824","NEWT:4787","NCBITaxon:4563","NEWT:5755","NEWT:44689","NEWT:3218","NEWT:5759","NEWT:1736231","NEWT:1270","NEWT:374990","NEWT:2242","NEWT:4784","NEWT:11320","NEWT:360106","NEWT:286","NEWT:287","NEWT:10117","NEWT:10239","NEWT:10116","NEWT:1280","NEWT:1735272","NEWT:83334","NEWT:83332","NEWT:44685","NEWT:317513","NEWT:1148","NEWT:580240","NEWT:294128","NEWT:11676","NEWT:55571","NEWT:100226","NEWT:4530","NEWT:4896","NEWT:75058","NEWT:13616","NEWT:1390","NEWT:1094343","NEWT:296543","NEWT:1773","NEWT:1895","NEWT:1182590","NEWT:3712","NEWT:105023","NEWT:935293","NEWT:64152","NEWT:4924","NEWT:749200","NEWT:375146","NEWT:990346","NEWT:145953","NEWT:257309","NEWT:100816","NEWT:263","NEWT:230741","NEWT:52283","NEWT:284812","NCBITaxon:1313","NEWT:43330","NEWT:1603293","NEWT:408169","NEWT:44544","NEWT:4911","NEWT:645463","NEWT:3702","NEWT:129249","NEWT:243277","NEWT:990119","NEWT:408172","NEWT:408170","NEWT:493760","NEWT:260710","NEWT:257313","NEWT:400772","NEWT:3708","NEWT:128161","NEWT:332648","NEWT:106592","NEWT:536231","NEWT:460519","NEWT:1187947","NEWT:1432138","NEWT:10312","NEWT:1424507","NCBITaxon:1773","NEWT:9598","NEWT:8030","NEWT:1639","NEWT:188229","NEWT:3818","NEWT:480","NEWT:4909","NEWT:67767","NEWT:432359","NEWT:46835","NEWT:1182263","NEWT:2711","NEWT:376686","NEWT:95486","NEWT:9103","NEWT:29159","NEWT:253","NEWT:10306","NCBITaxon:2759","NEWT:1233435","NEWT:93061","NEWT:8022","NEWT:145943","NCBITaxon:4932","NEWT:595536","NEWT:240906","NEWT:593117","NEWT:3635","NEWT:5811","NEWT:235443","NEWT:272623","NEWT:272624","NEWT:411483","NEWT:884019","NEWT:198215","NEWT:411490","NEWT:983964","NEWT:169963","NEWT:32644","NEWT:225117","NEWT:499175","NEWT:109779","NEWT:476272","NEWT:3747","NEWT:195051","NEWT:367830","NEWT:1255228","NEWT:178616","NEWT:410289","NEWT:373153","NEWT:352472","NEWT:357","NEWT:360094","NEWT:470","NEWT:1313","NEWT:411469","NEWT:84023","NEWT:559292","NEWT:39491","NCBITaxon:5811","NEWT:411464","NEWT:411460","NEWT:2014887","NEWT:2762","NEWT:1174673","NEWT:562","NEWT:411470","NEWT:33952","NEWT:2094720","NCBITaxon:2697049","NEWT:571256","NEWT:28038","NEWT:1663","NEWT:1423","NEWT:4932","NEWT:3603","NEWT:2759","NEWT:3847","NEWT:327159","NEWT:178876","NEWT:327160","NEWT:573","NEWT:9031","NEWT:7091","NEWT:108931","NEWT:241368","NEWT:42528","NEWT:190802","NEWT:9778","NEWT:150475","NEWT:303","NEWT:9417","NEWT:7111","NEWT:347515","NEWT:1216979","NEWT:5180","NEWT:256737","NEWT:9541","NEWT:115104","NEWT:1121114","NEWT:663","NEWT:1081927","NEWT:1238993","NEWT:67825","NEWT:185579","NEWT:941442","NEWT:220668","NEWT:13076","NEWT:1249668","NEWT:7108","NEWT:317","NEWT:7227","NEWT:7469","NEWT:885318","NEWT:9402","NEWT:415540","NEWT:550","NEWT:675060","NEWT:4081","NEWT:334542","NEWT:554","NEWT:98334","NEWT:426428","NEWT:7574","NEWT:1715256","NEWT:7215","NEWT:575412","NEWT:29204","NEWT:2172103","NEWT:507601","NEWT:643680","NCBITaxon:6157","NEWT:746360","NEWT:6239","NEWT:470150","NEWT:216257","NEWT:102169","NEWT:9986","NEWT:4054","NEWT:73239","NEWT:226186","NEWT:1268063","NEWT:8782","NEWT:1263854","NEWT:435590","NEWT:1902","NEWT:160488","NEWT:28104","NEWT:1908","NEWT:13164","NEWT:216129","NCBITaxon:2","NEWT:985076","NEWT:1215323","NEWT:52641","NEWT:7038","NEWT:6192","NEWT:28532","NCBITaxon:38727","NEWT:353152","NEWT:2829","NEWT:366581","NEWT:216599","NEWT:216595","NEWT:1194669","NEWT:243230","NEWT:8355","NEWT:9685","NEWT:7029","NEWT:1080772","NEWT:8479","NEWT:1283300","NEWT:6183","NEWT:6063","NEWT:630","NEWT:334747","NEWT:61235","NEWT:15368","NEWT:6289","NEWT:436486","NEWT:6287","NEWT:300641","NEWT:727","NEWT:9796","NEWT:725","NEWT:170187","NEWT:469008","NEWT:260707","NEWT:256318","NCBITaxon:6191","NEWT:1836","NEWT:185431","NEWT:29760","NEWT:260704","NEWT:703612","NEWT:260705","NEWT:80863","NEWT:2697049","NEWT:105231","N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