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Protein

DNA-3-methyladenine glycosylase 2

Gene

alkA

Organism
Escherichia coli (strain K12)
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

Hydrolysis of the deoxyribose N-glycosidic bond to excise 3-methyladenine, 3-methylguanine, 7-methylguanine, O2-methylthymine, and O2-methylcytosine from the damaged DNA polymer formed by alkylation lesions.

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

  • Hydrolysis of alkylated DNA, releasing 3-methyladenine, 3-methylguanine, 7-methylguanine and 7-methyladenine. EC:3.2.2.21

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections (‘Function’, ‘PTM / Processing’, ‘Pathology and Biotech’) according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei218Determinant for substrate specificity and/or activity1
<p>This subsection of the ‘Function’ section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei238Proton acceptor1

<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 functionHydrolase
Biological processDNA damage, DNA repair

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:EG11222-MONOMER
MetaCyc:EG11222-MONOMER

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
3.2.2.21 2026

<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_and_taxonomy_section">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:
DNA-3-methyladenine glycosylase 2 (EC:3.2.2.21)
Alternative name(s):
3-methyladenine-DNA glycosylase II, inducible
Short name:
TAG II
DNA-3-methyladenine glycosidase II
DNA-3-methyladenine glycosylase II
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:alkA
Synonyms:aidA
Ordered Locus Names:b2068, JW2053
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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>OrganismiEscherichia coli (strain K12)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 identifieri83333 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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
  • UP000000318 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">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> Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

Organism-specific databases

Escherichia coli strain K12 genome database

More...
EcoGenei
EG11222 alkA

<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

GO - Cellular componenti

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology_and_biotech_section">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi124Q → A: Methylmethane sulfonate-resistant. 1 Publication1
Mutagenesisi218W → A: No catalytic activity, methylmethane sulfonate-sensitive. 1 Publication1
Mutagenesisi237D → N: More than 30% catalytic activity, methylmethane sulfonate-resistant. 1 Publication1
Mutagenesisi238D → N: No catalytic activity, methylmethane sulfonate-sensitive. 1 Publication1

<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.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001948781 – 282DNA-3-methyladenine glycosylase 2Add BLAST282

Proteomic databases

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

More...
PaxDbi
P04395

PRoteomics IDEntifications database

More...
PRIDEi
P04395

<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 reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Up-regulated by methylated Ada in response to the exposure to alkylating agents.

<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_section">'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_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer.

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction_section%27">Interaction</a> section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="http://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated on a monthly basis. Each binary interaction is displayed on a separate line.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

WithEntry#Exp.IntActNotes
aceFP069592EBI-544077,EBI-542707

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

More...
BioGridi
4259681, 55 interactors

Database of interacting proteins

More...
DIPi
DIP-9084N

Protein interaction database and analysis system

More...
IntActi
P04395, 19 interactors

STRING: functional protein association networks

More...
STRINGi
316385.ECDH10B_2218

<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

Secondary structure

1282
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1DIZX-ray2.50A/B1-282[»]
1MPGX-ray1.80A/B1-282[»]
1PVSX-ray2.40A/B1-282[»]
3CVSX-ray2.40A/B/C/D1-282[»]
3CVTX-ray2.50A/B/C/D1-282[»]
3CW7X-ray2.30A/B/C/D1-282[»]
3CWAX-ray2.40A/B/C/D1-282[»]
3CWSX-ray2.30A/B/C/D1-282[»]
3CWTX-ray2.30A/B/C/D1-282[»]
3CWUX-ray2.80A/B/C/D1-282[»]
3D4VX-ray2.90A/B/C/D1-282[»]
3OGDX-ray2.80A2-282[»]
3OH6X-ray2.89A2-282[»]
3OH9X-ray2.80A2-282[»]

Protein Model Portal of the PSI-Nature Structural Biology Knowledgebase

More...
ProteinModelPortali
P04395

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

More...
SMRi
P04395

Database of comparative protein structure models

More...
ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...
EvolutionaryTracei
P04395

<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

<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

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105D03 Bacteria
COG0122 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000221908

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P04395

KEGG Orthology (KO)

More...
KOi
K01247

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P04395

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00056 ENDO3c, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.1670.10, 1 hit
3.30.310.20, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR010316 AlkA_N
IPR037046 AlkA_N_sf
IPR000035 Alkylbase_DNA_glycsylse_CS
IPR011257 DNA_glycosylase
IPR003265 HhH-GPD_domain
IPR023170 HTH_base_excis_C

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF06029 AlkA_N, 1 hit
PF00730 HhH-GPD, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM01009 AlkA_N, 1 hit
SM00478 ENDO3c, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF48150 SSF48150, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00516 ALKYLBASE_DNA_GLYCOS, 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_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>.<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_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

P04395-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MYTLNWQPPY DWSWMLGFLA ARAVSSVETV ADSYYARSLA VGEYRGVVTA
60 70 80 90 100
IPDIARHTLH INLSAGLEPV AAECLAKMSR LFDLQCNPQI VNGALGRLGA
110 120 130 140 150
ARPGLRLPGC VDAFEQGVRA ILGQLVSVAM AAKLTARVAQ LYGERLDDFP
160 170 180 190 200
EYICFPTPQR LAAADPQALK ALGMPLKRAE ALIHLANAAL EGTLPMTIPG
210 220 230 240 250
DVEQAMKTLQ TFPGIGRWTA NYFALRGWQA KDVFLPDDYL IKQRFPGMTP
260 270 280
AQIRRYAERW KPWRSYALLH IWYTEGWQPD EA
Length:282
Mass (Da):31,393
Last modified:March 20, 1987 - 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:iB66BB5E23019899C
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
K02498 Genomic DNA Translation: AAA23430.1
U00096 Genomic DNA Translation: AAC75129.1
AP009048 Genomic DNA Translation: BAA15926.1
M13827 Genomic DNA No translation available.

Protein sequence database of the Protein Information Resource

More...
PIRi
A00904 DGECMA

NCBI Reference Sequences

More...
RefSeqi
NP_416572.1, NC_000913.3
WP_000288420.1, NZ_LN832404.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC75129; AAC75129; b2068
BAA15926; BAA15926; BAA15926

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
947371

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW2053
eco:b2068

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|1411691.4.peg.183

<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
K02498 Genomic DNA Translation: AAA23430.1
U00096 Genomic DNA Translation: AAC75129.1
AP009048 Genomic DNA Translation: BAA15926.1
M13827 Genomic DNA No translation available.
PIRiA00904 DGECMA
RefSeqiNP_416572.1, NC_000913.3
WP_000288420.1, NZ_LN832404.1

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1DIZX-ray2.50A/B1-282[»]
1MPGX-ray1.80A/B1-282[»]
1PVSX-ray2.40A/B1-282[»]
3CVSX-ray2.40A/B/C/D1-282[»]
3CVTX-ray2.50A/B/C/D1-282[»]
3CW7X-ray2.30A/B/C/D1-282[»]
3CWAX-ray2.40A/B/C/D1-282[»]
3CWSX-ray2.30A/B/C/D1-282[»]
3CWTX-ray2.30A/B/C/D1-282[»]
3CWUX-ray2.80A/B/C/D1-282[»]
3D4VX-ray2.90A/B/C/D1-282[»]
3OGDX-ray2.80A2-282[»]
3OH6X-ray2.89A2-282[»]
3OH9X-ray2.80A2-282[»]
ProteinModelPortaliP04395
SMRiP04395
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi4259681, 55 interactors
DIPiDIP-9084N
IntActiP04395, 19 interactors
STRINGi316385.ECDH10B_2218

Proteomic databases

PaxDbiP04395
PRIDEiP04395

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiAAC75129; AAC75129; b2068
BAA15926; BAA15926; BAA15926
GeneIDi947371
KEGGiecj:JW2053
eco:b2068
PATRICifig|1411691.4.peg.183

Organism-specific databases

EchoBASE - an integrated post-genomic database for E. coli

More...
EchoBASEi
EB1204
EcoGeneiEG11222 alkA

Phylogenomic databases

eggNOGiENOG4105D03 Bacteria
COG0122 LUCA
HOGENOMiHOG000221908
InParanoidiP04395
KOiK01247
PhylomeDBiP04395

Enzyme and pathway databases

BioCyciEcoCyc:EG11222-MONOMER
MetaCyc:EG11222-MONOMER
BRENDAi3.2.2.21 2026

Miscellaneous databases

EvolutionaryTraceiP04395

Protein Ontology

More...
PROi
PR:P04395

Family and domain databases

CDDicd00056 ENDO3c, 1 hit
Gene3Di1.10.1670.10, 1 hit
3.30.310.20, 1 hit
InterProiView protein in InterPro
IPR010316 AlkA_N
IPR037046 AlkA_N_sf
IPR000035 Alkylbase_DNA_glycsylse_CS
IPR011257 DNA_glycosylase
IPR003265 HhH-GPD_domain
IPR023170 HTH_base_excis_C
PfamiView protein in Pfam
PF06029 AlkA_N, 1 hit
PF00730 HhH-GPD, 1 hit
SMARTiView protein in SMART
SM01009 AlkA_N, 1 hit
SM00478 ENDO3c, 1 hit
SUPFAMiSSF48150 SSF48150, 1 hit
PROSITEiView protein in PROSITE
PS00516 ALKYLBASE_DNA_GLYCOS, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
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 namei3MG2_ECOLI
<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: P04395
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: March 20, 1987
Last sequence update: March 20, 1987
Last modified: December 5, 2018
This is version 160 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)
Annotation programProkaryotic Protein Annotation Program

<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

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. Escherichia coli
    Escherichia coli (strain K12): entries and cross-references to EcoGene
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