Reviewed, UniProtKB/Swiss-Prot B1LLF1 (END8_ECOSM)

Names and origin

Protein names

Recommended name:
    Endonuclease 8
Alternative name(s):
    Endonuclease VIII
    DNA glycosylase/AP lyase Nei
    EC=3.2.2.-
    EC=4.2.99.18
    DNA-(apurinic or apyrimidinic site) lyase Nei

Gene names

Name:	nei
Ordered Locus Names:	EcSMS35_0730

Organism

Escherichia coli (strain SMS-3-5 / SECEC) [Complete proteome] [HAMAP]

Taxonomic identifier

439855 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Escherichia

Protein attributes

Sequence length	263 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Involved in base excision repair of DNA damaged by oxidation or by mutagenic agents. Acts as DNA glycosylase that recognizes and removes damaged bases. Has a preference for oxidized pyrimidines, such as thymine glycol, 5,6-dihydrouracil and 5,6-dihydrothymine. Has AP (apurinic/apyrimidinic) lyase activity and introduces nicks in the DNA strand. Cleaves the DNA backbone by beta-delta elimination to generate a single-strand break at the site of the removed base with both 3'- and 5'-phosphates By similarity.
Catalytic activity	Removes damaged bases from DNA, leaving an abasic site. HAMAP MF_01253 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. HAMAP MF_01253
Cofactor	Binds 1 zinc ion per subunit By similarity.
Sequence similarities	Belongs to the FPG family. Contains 1 FPG-type zinc finger.

Ontologies

Keywords
Biological process	DNA damage DNA repair
Domain	Zinc-finger
Ligand	DNA-binding Metal-binding Zinc
Molecular function	Glycosidase Hydrolase Lyase
Technical term	Complete proteome Multifunctional enzyme
Gene Ontology (GO)
Biological process	base-excision repair Inferred from electronic annotation. Source: InterPro nucleotide-excision repair Inferred from electronic annotation. Source: InterPro
Molecular function	damaged DNA binding Inferred from electronic annotation. Source: InterPro oxidized pyrimidine base lesion DNA N-glycosylase activity Inferred from electronic annotation. Source: HAMAP zinc 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
	Initiator methionine	1	1	Removed By similarity
	Chain	2 – 263	262	Endonuclease 8 HAMAP MF_01253		PRO_1000139937
Regions
	Zinc finger	229 – 263	35	FPG-type HAMAP MF_01253
Sites
	Active site	2	1	Schiff-base intermediate with DNA By similarity
	Active site	3	1	Proton donor By similarity
	Active site	53	1	Proton donor; for beta-elimination activity By similarity
	Active site	253	1	Proton donor; for delta-elimination activity By similarity
	Binding site	70	1	DNA By similarity
	Binding site	125	1	DNA By similarity
	Binding site	169	1	DNA By similarity

Sequences

	Sequence		Length	Mass (Da)
	B1LLF1-1 [UniParc]. Last modified April 29, 2008. Version 1. Checksum: 4C23CE75187B1A21	FASTA	263	29,811
	10 20 30 40 50 60 MPEGPEIRRA ADNLEAAIKG KPLTDVWFAF PQLKSYQSRL IGQHVTHVET RGKALLTHFS 70 80 90 100 110 120 NDLTLYSHNQ LYGVWRVVET GEEPQTTRVL RVKLQTADKT ILLYSASDIE MLTPEQLTTH 130 140 150 160 170 180 PFLQRVGPDV LDPKLTPEVA KERLLSPRFR NRQFAGLLLD QAFLAGLGNY LRVEILWQVG 190 200 210 220 230 240 LTGNHKAKDL NAAQLDALAH ALLDIPRLSY ATRGQVDENK YHGALFRFKV FHRDGEPCER 250 260 CGGIIEKTTL SSRPFYWCPG CQH

References

[1]

"Insights into the environmental resistance gene pool from the genome sequence of the multidrug-resistant environmental isolate Escherichia coli SMS-3-5." Fricke W.F., Wright M.S., Lindell A.H., Harkins D.M., Baker-Austin C., Ravel J., Stepanauskas R. J. Bacteriol. 190:6779-6794(2008) [PubMed: 18708504] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000970 Genomic DNA. Translation: ACB19089.1.
RefSeq	YP_001742818.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	6146476.
GenomeReviews	Gene locus EcSMS35_0730 in contig CP000970_GR.
KEGG	ecm:EcSMS35_0730.
Organism-specific databases
CMR	Search...
Phylogenomic databases
OMA	RSDFRVP.
Family and domain databases
HAMAP	MF_01253. [Tree]
InterPro	IPR015886. DNA_glyclase/AP_lyase_DNA-bd. IPR000214. DNA_glyclase/AP_lyase_Znf_dom. IPR015887. DNA_glyclase_Znf_dom_DNA_BS. IPR012319. DNA_glycosylase/AP_lyase_cat. [Graphical view]
Pfam	PF01149. Fapy_DNA_glyco. 1 hit. PF06831. H2TH. 1 hit. [Graphical view]
ProDom	PD003680. Fapy_DNA_glyco. 1 hit. [Graphical view] [Entries sharing at least one domain]
PROSITE	PS51068. FPG_CAT. 1 hit. PS01242. ZF_FPG_1. 1 hit. PS51066. ZF_FPG_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

END8_ECOSM

Accession

Primary (citable) accession number: B1LLF1

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 14, 2009
Last sequence update:	April 29, 2008
Last modified:	November 3, 2009
This is version 12 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)