Reviewed, UniProtKB/Swiss-Prot Q4UK93 (END3_RICFE)

Names and origin

Protein names

Recommended name:
    Endonuclease III
    EC=4.2.99.18
Alternative name(s):
    DNA-(apurinic or apyrimidinic site) lyase

Gene names

Name:	nth
Ordered Locus Names:	RF_1191

Organism

Rickettsia felis (Rickettsia azadi) [Complete proteome] [HAMAP]

Taxonomic identifier

42862 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Alphaproteobacteria › Rickettsiales › Rickettsiaceae › Rickettsieae › Rickettsia › spotted fever group

Protein attributes

Sequence length	213 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Has both an apurinic and/or apyrimidinic endonuclease activity and a DNA N-glycosylase activity. Incises damaged DNA at cytosines, thymines and guanines. Acts on a damaged strand, 5' from the damaged site By similarity.
Catalytic activity	The C-O-P bond 3' to the apurinic or apyrimidinic site in DNA is broken by a beta-elimination reaction, leaving a 3'-terminal unsaturated sugar and a product with a terminal 5'-phosphate.
Cofactor	Binds 1 4Fe-4S cluster. The cluster is not important for the catalytic activity, but which is probably involved in the proper positioning of the enzyme along the DNA strand By similarity.
Sequence similarities	Belongs to the nth/mutY family.

Ontologies

Keywords
Biological process	DNA damage DNA repair
Ligand	4Fe-4S Iron Iron-sulfur Metal-binding
Molecular function	Glycosidase Hydrolase Lyase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	base-excision repair Inferred from electronic annotation. Source: InterPro
Cellular component	intracellular Inferred from electronic annotation. Source: InterPro
Molecular function	4 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW DNA binding Inferred from electronic annotation. Source: InterPro DNA-(apurinic or apyrimidinic site) lyase activity Inferred from electronic annotation. Source: EC endonuclease activity Inferred from electronic annotation. Source: InterPro hydrolase activity, acting on glycosyl bonds Inferred from electronic annotation. Source: UniProtKB-KW iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 213	213	Endonuclease III		PRO_0000280932
Sites
	Metal binding	187	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	194	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	197	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	203	1	Iron-sulfur (4Fe-4S) By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q4UK93-1 [UniParc]. Last modified July 5, 2005. Version 1. Checksum: A949EE1DCC334D0F	FASTA	213	24,134
	10 20 30 40 50 60 MQAQIVNKIF EIFSKNNPSP KTELIYKNDF TLLVAVMLSA QATDISVNLA TKSLFETYDT 70 80 90 100 110 120 TEKILELGED GLKKYIKSIG LFNSKAKNII ALCKILISNY QSSVPNDFKE LIKLPGVGRK 130 140 150 160 170 180 TANVVLNCLF GMPTMAVDTH VFRVAKRIGL ARGNSPEIVE KELLQIINEK WLTHAHHWLI 190 200 210 LHGRYICKAR KPDCDICPIK EYCEYYNSPI ISK

References

[1]

"The genome sequence of Rickettsia felis identifies the first putative conjugative plasmid in an obligate intracellular parasite." Ogata H., Renesto P., Audic S., Robert C., Blanc G., Fournier P.-E., Parinello H., Claverie J.-M., Raoult D. PLoS Biol. 3:1-12(2005) [PubMed: 15984913] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC VR-1525 / URRWXCal2.

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000053 Genomic DNA. Translation: AAY62042.1.
RefSeq	YP_247207.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	3401489.
GenomeReviews	Gene locus RF_1191 in contig CP000053_GR.
KEGG	rfe:RF_1191.
NMPDR	fig|315456.3.peg.1191.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q4UK93.
OMA	Q4UK93. EPTIAVD.
Enzyme and pathway databases
BioCyc	RFEL315456:RF_1191-MON.
BRENDA	4.2.99.18. 297363.
Family and domain databases
InterPro	IPR004036. Endonuclease-III_CS2. IPR005759. Endonuclease-III_Nth. IPR004035. Endouclease-III_FeS-bd_CS1. IPR003651. Endouclease3-like_FeS-loop. IPR003583. Helix-hairpin-helix_DNA-bd. IPR003265. HhH-GPD_domain. IPR000445. HhH_motif. [Graphical view]
Pfam	PF10576. EndIII_4Fe-2S. 1 hit. PF00633. HHH. 1 hit. PF00730. HhH-GPD. 1 hit. [Graphical view]
SMART	SM00478. ENDO3c. 1 hit. SM00525. FES. 1 hit. SM00278. HhH1. 1 hit. [Graphical view]
TIGRFAMs	TIGR01083. nth. 1 hit.
PROSITE	PS00764. ENDONUCLEASE_III_1. False negative. PS01155. ENDONUCLEASE_III_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

END3_RICFE

Accession

Primary (citable) accession number: Q4UK93

Entry history

Integrated into UniProtKB/Swiss-Prot:	March 20, 2007
Last sequence update:	July 5, 2005
Last modified:	June 16, 2009
This is version 29 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)