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Entry version 94 (02 Dec 2020)
Sequence version 1 (24 May 2005)
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Protein

Flap endonuclease 1

Gene

repG

Organism
Dictyostelium discoideum (Slime mold)
Status
Reviewed-Annotation score:

Annotation score:4 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>
-Protein inferred from homologyi <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

Structure-specific nuclease with 5'-flap endonuclease and 5'-3' exonuclease activities involved in DNA replication and repair. During DNA replication, cleaves the 5'-overhanging flap structure that is generated by displacement synthesis when DNA polymerase encounters the 5'-end of a downstream Okazaki fragment. It enters the flap from the 5'-end and then tracks to cleave the flap base, leaving a nick for ligation. Also involved in the long patch base excision repair (LP-BER) pathway, by cleaving within the apurinic/apyrimidinic (AP) site-terminated flap. Acts as a genome stabilization factor that prevents flaps from equilibrating into structurs that lead to duplications and deletions. Also possesses 5'-3' exonuclease activity on nicked or gapped double-stranded DNA, and exhibits RNase H activity. Also involved in replication and repair of rDNA and in repairing mitochondrial DNA.UniRule annotation

<p>This subsection of the 'Function' section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

Mg2+UniRule annotationNote: Binds 2 magnesium ions per subunit. They probably participate in the reaction catalyzed by the enzyme. May bind an additional third magnesium ion after substrate binding.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi34Magnesium 1UniRule annotation1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei71DNA substrateUniRule annotation1
Metal bindingi87Magnesium 1UniRule annotation1
Metal bindingi159Magnesium 1UniRule annotation1
Binding sitei159DNA substrateUniRule annotation1
Metal bindingi161Magnesium 1UniRule annotation1
Metal bindingi180Magnesium 2UniRule annotation1
Metal bindingi182Magnesium 2UniRule annotation1
Binding sitei232DNA substrateUniRule annotation1
Metal bindingi234Magnesium 2UniRule annotation1
Binding sitei234DNA substrateUniRule annotation1

<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 functionEndonuclease, Exonuclease, Hydrolase, Nuclease
Biological processDNA damage, DNA repair, DNA replication
LigandMagnesium, Metal-binding

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-DDI-110362, POLB-Dependent Long Patch Base Excision Repair
R-DDI-5685939, HDR through MMEJ (alt-NHEJ)
R-DDI-69166, Removal of the Flap Intermediate

<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:
Flap endonuclease 1UniRule annotation (EC:3.1.-.-UniRule annotation)
Short name:
FEN-1UniRule annotation
Alternative name(s):
Flap structure-specific endonuclease 1UniRule annotation
<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:repGUniRule annotation
ORF Names:DDB_G0284987
<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>OrganismiDictyostelium discoideum (Slime mold)
<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 identifieri44689 [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 lineageiEukaryotaAmoebozoaEvoseaEumycetozoaDictyosteliaDictyostelialesDictyosteliaceaeDictyostelium
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000002195 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componentsi: Chromosome 4, Unassembled WGS sequence

Organism-specific databases

Dictyostelium discoideum online informatics resource

More...
dictyBasei
DDB_G0284987, repG

<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

Mitochondrion, 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_00004035141 – 384Flap endonuclease 1Add BLAST384

<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 upon DNA damage induces relocalization to the nuclear plasma.UniRule annotation

Keywords - PTMi

Phosphoprotein

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q54NU0

PRoteomics IDEntifications database

More...
PRIDEi
Q54NU0

<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

Interacts with PCNA. Three molecules of repg bind to one PCNA trimer with each molecule binding to one PCNA monomer. PCNA stimulates the nuclease activity without altering cleavage specificity.

UniRule annotation

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
44689.DDB0231109

<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
Q54NU0

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

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni1 – 105N-domainAdd BLAST105
Regioni123 – 254I-domainAdd BLAST132
Regioni338 – 346Interaction with PCNAUniRule annotation9

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the XPG/RAD2 endonuclease family. FEN1 subfamily.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG2519, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_032444_2_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q54NU0

Identification of Orthologs from Complete Genome Data

More...
OMAi
CDYLDPI

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q54NU0

Family and domain databases

HAMAP database of protein families

More...
HAMAPi
MF_00614, Fen, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR036279, 5-3_exonuclease_C_sf
IPR023426, Flap_endonuc
IPR008918, HhH2
IPR029060, PIN-like_dom_sf
IPR006086, XPG-I_dom
IPR006084, XPG/Rad2
IPR019974, XPG_CS
IPR006085, XPG_DNA_repair_N

The PANTHER Classification System

More...
PANTHERi
PTHR11081, PTHR11081, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00867, XPG_I, 1 hit
PF00752, XPG_N, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00853, XPGRADSUPER

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00279, HhH2, 1 hit
SM00484, XPGI, 1 hit
SM00485, XPGN, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF47807, SSF47807, 1 hit
SSF88723, SSF88723, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00841, XPG_1, 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>Sequencei

<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.

Q54NU0-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MGIKKLTDLI EDNAPTSIKT NILKNYFGRI IAIDASTSLY QFLIAMNADV
60 70 80 90 100
SSALTNQLGE TTSHLQGMFY RTIKLISRGI KPIYVFDGSA PVLKSGELAK
110 120 130 140 150
RQARRKEAKE NLKEATEVGT NEEVQKFAKR VITVTRKQNE DCIKLLTLMG
160 170 180 190 200
VPIVKAPCEA EAQCAEIVKK GKAWATGSED MDSLTLGSTV LLRRLFFSEA
210 220 230 240 250
KKMPILEFEL QSVLEGLGLT QDEFIDLSIL LGCDYCDSIK GIGPKRAIEL
260 270 280 290 300
IQKHKSLEEV IKHLDKSKYP LPEFFPYPEV RELFKNPNVI PADQLPPFQW
310 320 330 340 350
KDPDVEGLNK FLVEEMGFSD VRVAQGIEKL KKFKNTSVQS RMDSFITVIK
360 370 380
KPEDPNDKKK KVTKTPSKPS AKTSKKSSST FKRK
Length:384
Mass (Da):43,124
Last modified:May 24, 2005 - v1
<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:i007FB942B5DAACB9
GO

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
AAFI02000073 Genomic DNA Translation: EAL64957.1

NCBI Reference Sequences

More...
RefSeqi
XP_639977.1, XM_634885.1

Genome annotation databases

Ensembl protists genome annotation project

More...
EnsemblProtistsi
EAL64957; EAL64957; DDB_G0284987

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
8624889

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ddi:DDB_G0284987

<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
AAFI02000073 Genomic DNA Translation: EAL64957.1
RefSeqiXP_639977.1, XM_634885.1

3D structure databases

SMRiQ54NU0
ModBaseiSearch...

Protein-protein interaction databases

STRINGi44689.DDB0231109

Proteomic databases

PaxDbiQ54NU0
PRIDEiQ54NU0

Genome annotation databases

EnsemblProtistsiEAL64957; EAL64957; DDB_G0284987
GeneIDi8624889
KEGGiddi:DDB_G0284987

Organism-specific databases

dictyBaseiDDB_G0284987, repG

Phylogenomic databases

eggNOGiKOG2519, Eukaryota
HOGENOMiCLU_032444_2_0_1
InParanoidiQ54NU0
OMAiCDYLDPI
PhylomeDBiQ54NU0

Enzyme and pathway databases

ReactomeiR-DDI-110362, POLB-Dependent Long Patch Base Excision Repair
R-DDI-5685939, HDR through MMEJ (alt-NHEJ)
R-DDI-69166, Removal of the Flap Intermediate

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q54NU0

Family and domain databases

HAMAPiMF_00614, Fen, 1 hit
InterProiView protein in InterPro
IPR036279, 5-3_exonuclease_C_sf
IPR023426, Flap_endonuc
IPR008918, HhH2
IPR029060, PIN-like_dom_sf
IPR006086, XPG-I_dom
IPR006084, XPG/Rad2
IPR019974, XPG_CS
IPR006085, XPG_DNA_repair_N
PANTHERiPTHR11081, PTHR11081, 1 hit
PfamiView protein in Pfam
PF00867, XPG_I, 1 hit
PF00752, XPG_N, 1 hit
PRINTSiPR00853, XPGRADSUPER
SMARTiView protein in SMART
SM00279, HhH2, 1 hit
SM00484, XPGI, 1 hit
SM00485, XPGN, 1 hit
SUPFAMiSSF47807, SSF47807, 1 hit
SSF88723, SSF88723, 1 hit
PROSITEiView protein in PROSITE
PS00841, XPG_1, 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 nameiFEN1_DICDI
<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: Q54NU0
<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: January 11, 2011
Last sequence update: May 24, 2005
Last modified: December 2, 2020
This is version 94 of the entry and version 1 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)

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Reference proteome

Documents

  1. Dictyostelium discoideum
    Dictyostelium discoideum: entries, gene names and cross-references to dictyBase
  2. SIMILARITY comments
    Index of protein domains and families
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