Detailed entry information

Protein Information (annotations from UniProt)

Database IDHIV0003201
UniProt IDQ8WU68
Primary gene name(s)U2AF1L4
Synonym gene name(s)U2AF1-RS3, U2AF1L3
Protein nameSplicing factor U2AF 26 kDa subunit
Protein functionRNA-binding protein that function as a pre-mRNA splicing factor. Plays a critical role in both constitutive and enhancer-dependent splicing by mediating protein-protein interactions and protein-RNA interactions required for accurate 3'-splice site selection. Acts by enhancing the binding of U2AF2 to weak pyrimidine tracts. Also participates in the regulation of alternative pre-mRNA splicing. Activates exon 5 skipping of PTPRC during T-cell activation; an event reversed by GFI1. Binds to RNA at the AG dinucleotide at the 3'-splice site, By similarity. Shows a preference for AGC or AGA, By similarity. {ECO:0000250|UniProtKB:Q8BGJ9}.
Subcellular locationNucleus {ECO:0000250|UniProtKB:Q8BGJ9}. Nucleus speckle {ECO:0000250|UniProtKB:Q8BGJ9}. Cytoplasm {ECO:0000250|UniProtKB:Q8BGJ9}. Note=Interaction with C1QBP is required for the nuclear translocation. Displays active nucleo-cytoplasmic shuttling. {ECO:0000250|UniProtKB:Q8BGJ9}.
ECO codeClick here for more information.
Amino acid sequence
FASTA format: Q8WU68
Gene Ontology
(Biological Process)
Complete annatation
mRNA splicing, via spliceosome [GO:0000398]
Gene Ontology
(Molecular Function)
Complete annatation
metal ion binding [GO:0046872];
nucleotide binding [GO:0000166];
RNA binding [GO:0003723]
Gene Ontology
(Cellular Component)
Complete annatation
cytoplasm [GO:0005737];
nuclear speck [GO:0016607];
spliceosomal complex [GO:0005681];
U2AF [GO:0089701]
Protein-protein interaction128270
Phylogenetic treeQ8WU68
HIV replication factor status Zhou et al., Cell. Host. Microbe., 2008
      unknown
Brass et al., Science, 2008
      unknown
Smith et al., J. Immunol, 2010
      unknown
Interferon-stimulated
gene status
Lu et al., J. Virol., 2011
      Folds changes 8h: unknown; Folds changes 16h: unknown; Tested: unknown;
Schoggins JW and Rice CM, Curr. Opin. Virol., 2011
      Targeted viruses: unknown
      Viral life cycle: unknown
      Mechanism related to antiviral activity: unknown
Anti-viral restriction factor Liu et al., Retrovirology, 2011
      unknown (Triplicates)

Gene Expression Profile       top

            Up-regulated;            Down-regulated

For brief introduction to each study, please go to the help page.

Gene expression during HIV latency

(1). Mohammadi et al., PLoS Pathog., 2014

Differentially expressed transcripts (Pairwise) during latency and subsequent viral reactivation using several agents - Primary CD4+ T-cell based model


DMSO: Dimethyl suloxyde (negative control) - 0.0033% final
SAHA: Vorinostat (Histone deacetylase inhibitor) - 0.5 μM
CD3: TCR Stimulation by IL-2+ antiCD3/anti-CD28 antibodies
IL7: Interleukin-7 based stimulation
DISU: Disulfiram (alcohol dehydrogenase inhibitor) - 0.5 μM
AZA: 5-azacytidine (AZA; DNA methylation inhibitor) - 1 μM
Experimental Condition Log2 Fold Change P value Adjusted P value
AZA vs. CD3-0.7106526632061720.03246770337073850.0696092781228691
AZA vs. DISU0.05649605945765920.8250867738295940.985177903861482
AZA vs. IL7-0.4060046401727880.03963877580415590.609164800549145
AZA vs. SAHA0.181138203005690.4636024551301150.801836834635548
DISU vs. CD30.7544588882011010.03982515644803510.0898823788437911
DISU vs. IL7-0.4726597657145620.06422461235186640.335395507111631
DISU vs. SAHA0.1272757924916190.6645202614182610.897882809739521
DMSO vs. AZA0.02314980937640450.8931653801584841
DMSO vs. CD30.7207203926240390.02633317906986290.0563187596092397
DMSO vs. DISU-0.03573894976271460.8847099608762080.987802141379617
DMSO vs. IL7-0.4214927656606240.02249155056188860.305562439608669
DMSO vs. SAHA0.1533099439193540.5206248862709870.824343999714632
HIV vs. Mock in Activation0.2421128094715580.6999017037487810.999983755607037
HIV vs. Mock in Latency-0.02718319535410360.8720860997294040.999834320637052
IL7 vs. CD30.3092625751760330.3421375378272710.479278727478667
SAHA vs. CD30.8687897101032670.01525003092340220.0366243770542901
SAHA vs. IL70.5847247143774140.01830756124695170.0948344255108417
(2). Iglesias-Ussel et al., J. Virol., 2013

Up and Downregulated transcripts during Latency (Latently infected CD4+ T cells vs Uninfected)- Primary CD4+Tcell based model
Log2 Fold Change P Value
unknown unknown

Gene expression during HIV infection and replication

(1). Imbeault et al., PloS Pathog., 2012

Transcriptomic profiling of HIV-1 infected CD4+ T cells - Primary CD4+ T cells
Experiment type Log2 Fold Change P Value Adjusted P Value
Infected vs. Mock unknown unknown unknown
Infected vs. Bystander unknown unknown unknown
(2). Lefebvre et al., J. Virol., 2011

Transcriptome analysis of T-cell line (Sup T1)
Log2 Fold Change unknown
(3). Li et al., J. Immunol., 2013

Lymphatic tissue
Acute Fold Change Acute P Value Asymt Fold Change Asypt P Value AIDS Fold Change AIDS P Value
unknown unknown unknown unknown unknown unknown
(4). Chang et al., MBio., 2011

Transcriptome analysis of T-cell line (Sup T1)

Derived from Sherrill-Mix et al., BMC Retrovirol., 2015 cross validation
Up-regulated (True) TRUE
(5). Sherrill-Mix et al., BMC Retrovirol., 2015

Deep RNA-seq analysis of primary human T cell infected with low passage HIV isolate HIV89.6 - Primary CD4+ T cell based
Test Status Log2 Fold Change P Value
OK -0.597688 0.000305467
(6). Rotger et al., PLoS Pathog., 2010

Genome-wide mRNA expression of CD4+ T cells from HIV-infected patient
(Genes differentially expressed (at adjusted p<0.01) according to the empirical Bayes approach)
Log2 Fold Change P Value
unknown unknown

Proteomic/Transcriptomics studies indicating differentially expressed genes mediated by HIV

(1). Greenwood et al., Elife, 2016

Activated (CD3/CD28) Primary human CD4+ T cells infected with pNL4-3-dE-EGFP. The table shows the complete (unfiltered) TMT (tandem mass tag)-based proteomic time course dataset
6 h 24 h 48 h 72 h RTi
unknown unknown unknown unknown unknown
(2). Navare et al., Virology, 2012

SUP-T1 cell line
FC-4hpi P-value FC-8hpi P-value FC-20hpi P-value Category
unknown unknown unknown unknown unknown unknown unknown
(3). Hyrcza et al., J. Virolo., 2007

Primary human CD4+ and CD8+ T Cells
Affymetrix Prob ID Fold Change In CD8? Category
unknown unknown unknown unknown

Protein Overview       top

Drug-protein Interaction       (annotations from DrugBank)      top

not found

Protein Secondary Structure       (annotations from PDB)      top

not found

HIV-1 Interaction       (annotations from NCBI HIV-1 Interaction Database)      top

not found

Metabolic/Signalling Pathway       (annotations from KEGG database)      top

Pathway Accession Number Description
hsa03040 Spliceosome - Homo sapiens (human)
hsa05131 Shigellosis - Homo sapiens (human)
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