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Entry version 74 (07 Apr 2021)
Sequence version 2 (02 Mar 2010)
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Protein

Interleukin enhancer-binding factor 3-B

Gene

ilf3-b

Organism
Xenopus laevis (African clawed frog)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

RNA-binding protein that plays an essential role in the biogenesis of circular RNAs (circRNAs) which are produced by back-splicing circularization of pre-mRNAs. Within the nucleus, promotes circRNAs processing by stabilizing the regulatory elements residing in the flanking introns of the circularized exons. Plays thereby a role in the back-splicing of a subset of circRNAs. As a consequence, participates in a wide range of transcriptional and post-transcriptional processes. Binds to poly-U elements and AU-rich elements (AREs) in the 3'-UTR of target mRNAs (By similarity). Upon viral infection, ILF3 accumulates in the cytoplasm and participates in the innate antiviral response. Mechanistically, ILF3 becomes phosphorylated and activated by the double-stranded RNA-activated protein kinase/PKR which releases ILF3 from cellular mature circRNAs. In turn, unbound ILF3 molecules are able to interact with and thus inhibit viral mRNAs. Has a cytoplasmic role early in development as part of a ribonucleoprotein (mRNP) complex which may regulate mRNA transport and/or translation. Following nuclear localization at the mid-blastula transition, acts as a transcription factor and binds the 5'-CCAAT-3' promoter sequence to regulate transcription of the gata2 gene as a subunit of the CCAAT box transcription factor (CBTF). Its role as an mRNP component negatively regulates its activity as a transcription factor by precluding its nuclear localization.By similarity

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionDevelopmental protein, DNA-binding, RNA-binding
Biological processAntiviral defense, Transcription, Transcription regulation

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Interleukin enhancer-binding factor 3-B
Alternative name(s):
Double-stranded RNA-binding protein 4F.21 Publication
Short name:
DsRNA-binding protein 4F.2Imported
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:ilf3-b
Synonyms:ubp41 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiXenopus laevis (African clawed frog)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri8355 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaAnuraPipoideaPipidaeXenopodinaeXenopusXenopus

Organism-specific databases

Xenopus laevis and tropicalis biology and genomics resource

More...
Xenbasei
XB-GENE-6256032, ilf3.L

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Keywords - Cellular componenti

Cytoplasm, Nucleus

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00003916901 – 898Interleukin enhancer-binding factor 3-BAdd BLAST898

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Phosphorylated. Phosphorylation affects nuclear translocation (By similarity).By similarity
Methylated by protein arginine N-methyltransferase 1 (prmt1b) in the RGG-rich domain. Methylation decreases DNA-binding and thereby decreases transcription of the gata2 gene, but does not regulate dsRNA binding or subcellular localization.By similarity

Keywords - PTMi

Methylation, Phosphoprotein

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified 'at the protein level'.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Expressed maternally in the oocyte (at protein level).1 Publication

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

A component of a ybx2/frgy2-containing mRNA-ribonucleoprotein (mRNP) complex. Also a component of the CCAAT box transcription factor (CBTF) complex.

By similarity1 Publication

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q6DD04

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini5 – 379DZFPROSITE-ProRule annotationAdd BLAST375
Domaini399 – 468DRBM 1PROSITE-ProRule annotationAdd BLAST70
Domaini521 – 587DRBM 2PROSITE-ProRule annotationAdd BLAST67

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi372 – 390Bipartite nuclear localization signalSequence analysisAdd BLAST19

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi386 – 390Poly-LysSequence analysis5
Compositional biasi606 – 713Arg/Gly-richSequence analysisAdd BLAST108
Compositional biasi717 – 747Pro-richSequence analysisAdd BLAST31
Compositional biasi731 – 796Gln-richSequence analysisAdd BLAST66

Keywords - Domaini

Repeat

Phylogenomic databases

Identification of Orthologs from Complete Genome Data

More...
OMAi
YSHGQGN

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.30.460.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR014720, dsRBD_dom
IPR006561, DZF_dom
IPR033099, ILF3/NF90
IPR043519, NT_sf

The PANTHER Classification System

More...
PANTHERi
PTHR45762:SF4, PTHR45762:SF4, 3 hits

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00035, dsrm, 2 hits
PF07528, DZF, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00358, DSRM, 2 hits
SM00572, DZF, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50137, DS_RBD, 2 hits
PS51703, DZF, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequences (2)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry describes 2 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform. This section is only present in reviewed entries, i.e. in UniProtKB/Swiss-Prot.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket
Isoform 11 Publication (identifier: Q6DD04-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MRPMRIFLND DRHVMAKHSV VYPTQEELEA VQNMVSHTER ALKAVSDWID
60 70 80 90 100
QQEKDSGIEQ ENPEPEETET TEEGKDSEAK TGENPTRTLR GVMRVGLVAK
110 120 130 140 150
GLLLKGDLDL ELVLLCRDKP TISLLKRVAD NLVLQFETVS EDKYEVVQNI
160 170 180 190 200
REASIVIKNT KEPPLTLHIR LTSPLVREEV EKLSAGETLT VSDPPDVLDR
210 220 230 240 250
HKCLAALASL RHAKWFQARA NGLKSCVIVI RVLRDLCTRV PTWEPLRGWP
260 270 280 290 300
LELLCEKAIG TANRPMGAGE ALRRVLECLS SGILMPDGPG LYDPCEKDAS
310 320 330 340 350
DALEHLERQQ REDITQSAQH ALRLAAFGQL HKVLGMDPLP TKMPKKTKIE
360 370 380 390 400
IPIIDYTVQI PPSTTYAMPA LKRPIEEDGE DKSPSKKKKK IQKKDEKSEP
410 420 430 440 450
PQAMNALMRL NQLKPGLQYK LISQTGPVHA PIFTMSVEVD DKTFEASGPS
460 470 480 490 500
KKTAKLHVAV KVLQDMGLPT GIDEKEESVD ESEEKPVLQT PSQTADSEQA
510 520 530 540 550
DSSAGDQSES GKQQGPILTR HGKNPVMELN EKRRGLKYEL ISETGGSHDK
560 570 580 590 600
RFIMEVEVDG VKFQGNGSNK KVAKAYAALS ALEKLFPDYT TYTEAPKKKR
610 620 630 640 650
PPMMPRGGPK FAGKHNQGFG MMYNEVPPPQ VMRGRGRGGM NRGRGRGRGG
660 670 680 690 700
FGGGNYGGYM NSGGYGGGYG GNNYQTSATA GYSQFYSNGG ASGNAGGGGA
710 720 730 740 750
GSGGYSSYYQ GEGYNAPTPP KPFVKKPPPP QQQQQPPPQH ASNPPKPSYN
760 770 780 790 800
QGYQGHQGGQ QQQQPQQQQQ QTYNQNQYSN YGPPQKQKGG YNQGTQGAAS
810 820 830 840 850
AGSYNYSNSY TGGTACRVRQ WRGCRRARRP ALTQRQALVT TQGRTPAMVQ
860 870 880 890
PAVPHRTKVT HSRTTIKVPP DRTTAALQII TSPLREEQEV MAGIQITT
Length:898
Mass (Da):98,702
Last modified:March 2, 2010 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iA4F256881111EFDC
GO
Isoform 2 (identifier: Q6DD04-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     684-698: QFYSNGGASGNAGGG → DFFTDCYGYHDFASA
     699-898: Missing.

Show »
Length:698
Mass (Da):77,175
Checksum:iC0A778CCCE789AFF
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti137E → K in AAA19961 (PubMed:7922339).Curated1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_053196684 – 698QFYSN…NAGGG → DFFTDCYGYHDFASA in isoform 2. 1 PublicationAdd BLAST15
Alternative sequenceiVSP_053197699 – 898Missing in isoform 2. 1 PublicationAdd BLAST200

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
BC077828 mRNA Translation: AAH77828.1
U07156 mRNA Translation: AAA19961.1

Protein sequence database of the Protein Information Resource

More...
PIRi
I51653

NCBI Reference Sequences

More...
RefSeqi
NP_001180330.1, NM_001193401.1 [Q6DD04-2]

Genome annotation databases

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
398578

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
xla:398578

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC077828 mRNA Translation: AAH77828.1
U07156 mRNA Translation: AAA19961.1
PIRiI51653
RefSeqiNP_001180330.1, NM_001193401.1 [Q6DD04-2]

3D structure databases

SMRiQ6DD04
ModBaseiSearch...

Genome annotation databases

GeneIDi398578
KEGGixla:398578

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
398578
XenbaseiXB-GENE-6256032, ilf3.L

Phylogenomic databases

OMAiYSHGQGN

Family and domain databases

Gene3Di3.30.460.10, 1 hit
InterProiView protein in InterPro
IPR014720, dsRBD_dom
IPR006561, DZF_dom
IPR033099, ILF3/NF90
IPR043519, NT_sf
PANTHERiPTHR45762:SF4, PTHR45762:SF4, 3 hits
PfamiView protein in Pfam
PF00035, dsrm, 2 hits
PF07528, DZF, 1 hit
SMARTiView protein in SMART
SM00358, DSRM, 2 hits
SM00572, DZF, 1 hit
PROSITEiView protein in PROSITE
PS50137, DS_RBD, 2 hits
PS51703, DZF, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiILF3B_XENLA
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q6DD04
Secondary accession number(s): Q91551
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: March 2, 2010
Last sequence update: March 2, 2010
Last modified: April 7, 2021
This is version 74 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

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