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Protein

Flap endonuclease 1

Gene

fen

Organism
Sulfolobus tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

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. Binds the unpaired 3'-DNA end and kinks the DNA to facilitate 5' cleavage specificity. Cleaves one nucleotide into the double-stranded DNA from the junction in flap DNA, leaving a nick for ligation. Also involved in the base excision repair (BER) pathway. Acts as a genome stabilization factor that prevents flaps from equilibrating into structures that lead to duplications and deletions. Also possesses 5'-3' exonuclease activity on nicked or gapped double-stranded DNA (By similarity).By similarity

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)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi27 – 271Magnesium 1UniRule annotation
Metal bindingi80 – 801Magnesium 1UniRule annotation
Metal bindingi154 – 1541Magnesium 1UniRule annotation
Metal bindingi156 – 1561Magnesium 1UniRule annotation
Metal bindingi175 – 1751Magnesium 2UniRule annotation
Metal bindingi177 – 1771Magnesium 2UniRule annotation
Metal bindingi238 – 2381Magnesium 2UniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Endonuclease, Exonuclease, Hydrolase, Nuclease

Keywords - Biological processi

DNA damage, DNA repair, DNA replication

Keywords - Ligandi

Magnesium, Metal-binding

Enzyme and pathway databases

BRENDAi3.1.99.B1. 6166.

Names & Taxonomyi

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
Gene namesi
Name:fenUniRule annotation
Ordered Locus Names:STK_02100
OrganismiSulfolobus tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7)
Taxonomic identifieri273063 [NCBI]
Taxonomic lineageiArchaeaCrenarchaeotaThermoproteiSulfolobalesSulfolobaceaeSulfolobus
Proteomesi
  • UP000001015 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 351351Flap endonuclease 1PRO_0000154066Add
BLAST

Interactioni

Subunit structurei

Interacts with PCNA. PCNA stimulates the nuclease activity without altering cleavage specificity.UniRule annotation

Protein-protein interaction databases

STRINGi273063.ST0210.

Structurei

3D structure databases

ProteinModelPortaliQ976H6.
SMRiQ976H6. Positions 5-351.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni1 – 9898N-domainAdd
BLAST
Regioni118 – 260143I-domainAdd
BLAST
Regioni343 – 3519Interaction with PCNAUniRule annotation

Sequence similaritiesi

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

Phylogenomic databases

eggNOGiarCOG04050. Archaea.
COG0258. LUCA.
HOGENOMiHOG000193852.
KOiK04799.
OMAiGSQDYDS.

Family and domain databases

CDDicd09867. PIN_FEN1. 1 hit.
Gene3Di3.40.50.1010. 1 hit.
HAMAPiMF_00614. Fen. 1 hit.
InterProiIPR020045. 5-3_exonuclease_C.
IPR023426. Flap_endonuc.
IPR019973. Flap_structure-sp_endonuc_arc.
IPR008918. HhH2.
IPR029060. PIN_domain-like.
IPR006086. XPG-I_dom.
IPR006084. XPG/Rad2.
IPR019974. XPG_CS.
IPR006085. XPG_DNA_repair_N.
[Graphical view]
PANTHERiPTHR11081. PTHR11081. 1 hit.
PfamiPF00867. XPG_I. 1 hit.
PF00752. XPG_N. 1 hit.
[Graphical view]
PRINTSiPR00853. XPGRADSUPER.
SMARTiSM00279. HhH2. 1 hit.
SM00484. XPGI. 1 hit.
SM00485. XPGN. 1 hit.
[Graphical view]
SUPFAMiSSF47807. SSF47807. 1 hit.
SSF88723. SSF88723. 1 hit.
TIGRFAMsiTIGR03674. fen_arch. 1 hit.
PROSITEiPS00841. XPG_1. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q976H6-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDLAELVEEI KKELSFAELK GKKISIDAYN ALYQFLAAIR QPDGTPLMDS
60 70 80 90 100
QGRVTSHLNG LFYRTISILE EGIIPIYVFD GKPPEQKAQE LERRKKVKEE
110 120 130 140 150
AEKKLEQAKT EGSIKTSELK KYAQMSIRLT NEMAEESKEL LKAMGIPVVQ
160 170 180 190 200
APSEGEAEAA YINILGLSWA TASQDYDSLL FGAKRLIRNL TLSGKRKLPG
210 220 230 240 250
KDVYVEIKPE LIELDTLLKK LGLTREQLID IGIIVGTDYN PDGIKGYGVK
260 270 280 290 300
TAYRIIKKYG SLEKAIEKGE IPKIKVNFNV EEIRSLFLKP QVVEPKENLE
310 320 330 340 350
LVDCDSNKIL DILVKTHDFN EERVKNGIER LEKAKREAKG ASRQTGLDQW

F
Length:351
Mass (Da):39,657
Last modified:February 12, 2003 - v2
Checksum:iDC48398E1CA06CE4
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000023 Genomic DNA. Translation: BAK54195.1.

Genome annotation databases

EnsemblBacteriaiBAK54195; BAK54195; STK_02100.
KEGGisto:STK_02100.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000023 Genomic DNA. Translation: BAK54195.1.

3D structure databases

ProteinModelPortaliQ976H6.
SMRiQ976H6. Positions 5-351.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi273063.ST0210.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAK54195; BAK54195; STK_02100.
KEGGisto:STK_02100.

Phylogenomic databases

eggNOGiarCOG04050. Archaea.
COG0258. LUCA.
HOGENOMiHOG000193852.
KOiK04799.
OMAiGSQDYDS.

Enzyme and pathway databases

BRENDAi3.1.99.B1. 6166.

Family and domain databases

CDDicd09867. PIN_FEN1. 1 hit.
Gene3Di3.40.50.1010. 1 hit.
HAMAPiMF_00614. Fen. 1 hit.
InterProiIPR020045. 5-3_exonuclease_C.
IPR023426. Flap_endonuc.
IPR019973. Flap_structure-sp_endonuc_arc.
IPR008918. HhH2.
IPR029060. PIN_domain-like.
IPR006086. XPG-I_dom.
IPR006084. XPG/Rad2.
IPR019974. XPG_CS.
IPR006085. XPG_DNA_repair_N.
[Graphical view]
PANTHERiPTHR11081. PTHR11081. 1 hit.
PfamiPF00867. XPG_I. 1 hit.
PF00752. XPG_N. 1 hit.
[Graphical view]
PRINTSiPR00853. XPGRADSUPER.
SMARTiSM00279. HhH2. 1 hit.
SM00484. XPGI. 1 hit.
SM00485. XPGN. 1 hit.
[Graphical view]
SUPFAMiSSF47807. SSF47807. 1 hit.
SSF88723. SSF88723. 1 hit.
TIGRFAMsiTIGR03674. fen_arch. 1 hit.
PROSITEiPS00841. XPG_1. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiFEN_SULTO
AccessioniPrimary (citable) accession number: Q976H6
Secondary accession number(s): F9VMP9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 12, 2003
Last sequence update: February 12, 2003
Last modified: September 7, 2016
This is version 86 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.