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UniProtKB - P00722 (BGAL_ECOLI)

Entry version 210 (23 Feb 2022)
Sequence version 2 (23 Jan 2007)
Previous versions | rss
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Protein

Beta-galactosidase

Gene

lacZ

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

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 terminal non-reducing beta-D-galactose residues in beta-D-galactosides. EC:3.2.1.23

<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

Protein has several cofactor binding sites:

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Inhibited by phenylethyl thio-beta-D-galactoside (PETG), isopropyl thio-beta-D-galactoside (IPTG), L-ribose, D-galactonolactone, lactose and 2-amino-D-galactose.1 Publication

<p>This subsection of the 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

The values for the enzymatic assays using manganese as cofactor are very close.
  1. KM=0.04 mM for p-nitrophenyl beta-D-galactoside6 Publications
  2. KM=0.12 mM for o-nitrophenyl beta-D-galactoside6 Publications
  3. KM=0.15 mM for 2,3-dinitrophenyl beta-D-galactopyranoside6 Publications
  4. KM=0.41 mM for 2,5-dinitrophenyl beta-D-galactopyranoside6 Publications
  5. KM=11.6 mM for p-nitrophenol-alpha-L-arabinopyranoside6 Publications
  6. KM=16.9 mM for p-nitrophenol-beta-D-fucopyranoside6 Publications
  7. KM=34 µM for p-nitrophenyl beta-D-galactoside (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  8. KM=140 µM for o-nitrophenyl beta-D-galactoside (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  9. KM=940 µM for allolactose (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  10. KM=1350 µM for lactose (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  1. Vmax=30.9 µmol/min/mg enzyme with lactose as substrate (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  2. Vmax=49.7 µmol/min/mg enzyme with allolactose as substrate (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  3. Vmax=59.7 µmol/min/mg enzyme with p-nitrophenyl beta-D-galactoside as substrate (with magnesium as cofactor and 30 degrees Celsius)6 Publications
  4. Vmax=360 µmol/min/mg enzyme with o-nitrophenyl beta-D-galactoside as substrate (with magnesium as cofactor and 30 degrees Celsius)6 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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 sitei103Substrate1
<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 bindingi202Sodium1
Binding sitei202Substrate1
<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>Sitei358Transition state stabilizer1
Sitei392Transition state stabilizer1
Metal bindingi417Magnesium 11 Publication1
Metal bindingi419Magnesium 11 Publication1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> 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 sitei462Proton donor1 Publication1
Metal bindingi462Magnesium 11 Publication1
Binding sitei462Substrate1
Active sitei538Nucleophile1 Publication1
Metal bindingi598Magnesium 21 Publication1
Metal bindingi602Sodium; via carbonyl oxygen1
Metal bindingi605Sodium1
Binding sitei605Substrate1
Binding sitei1000Substrate1
Sitei1000Important for ensuring that an appropriate proportion of lactose is converted to allolactose1

<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

Complete GO annotation on QuickGO ...

GO - Biological processi

  • lactose catabolic process Source: EcoCyc
Complete GO annotation on QuickGO ...

<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 functionGlycosidase, Hydrolase
LigandMagnesium, Manganese, Metal-binding, Sodium

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...BioCyci		EcoCyc:BETAGALACTOSID-MONOMER

BRENDA Comprehensive Enzyme Information System

More...BRENDAi		3.2.1.23, 2026

SABIO-RK: Biochemical Reaction Kinetics Database

More...SABIO-RKi		P00722

Protein family/group databases

Carbohydrate-Active enZymes

More...CAZyi		GH2, Glycoside Hydrolase Family 2

<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:
Beta-galactosidase (EC:3.2.1.23)
Short name:
Beta-gal
Alternative name(s):
Lactase
<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:lacZ
Ordered Locus Names:b0344, JW0335
<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>OrganismiEscherichia coli (strain K12)
<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 identifieri83333 [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 lineageiBacteria › Proteobacteria › Gammaproteobacteria › Enterobacterales › Enterobacteriaceae › Escherichia ›
<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
  • UP000000318 <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> Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

<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

<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%5Fand%5Fbiotech%5Fsection">'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>Mutagenesisi202D → E or N: Causes a significant decrease in binding affinity in the absence of monovalent cations or in the presence of potassium ions, but only a moderate decrease in the presence of sodium ions. 1 Publication1
Mutagenesisi202D → F: Obliterates all binding and catalysis. 1 Publication1
Mutagenesisi358H → D, F, L or N: Less stable to heat than wild-type. Causes significant destabilizations of the first transition state. 1 Publication1
Mutagenesisi392H → E, F or K: Essentially inactive unless very rapid purification. Causes very large destabilizations of the transition state. 1 Publication1
Mutagenesisi462E → H: Slowly inactivates galactosidase activity by reducing the binding of magnesium. It increases binding specificity. 1 Publication1
Mutagenesisi538E → Q: 10000-fold decrease in the beta-galactosidase activity. 1 Publication1
Mutagenesisi541H → E, F or N: Poorly reactive with galactosyl substrates. Less stable to heat than wild-type. 1 Publication1
Mutagenesisi602F → A: Decreases the stability of the loop 794-804. 1 Publication1
Mutagenesisi795G → A: It forces the apoenzyme to adopt the closed rather than the open conformation. Reduces the binding affinity. 1 Publication1
Mutagenesisi798E → A or L: The catalytic efficiency is not increased, when the sodium concentration increases. 1 Publication1
Mutagenesisi798E → D or Q: Small increase of the catalytic efficiency, when the sodium concentration increases. 1 Publication1
Mutagenesisi1000W → F, G, L or T: Decreases affinity for substrate. 1 Publication1

Miscellaneous databases

Pathogen-Host Interaction database

More...PHI-basei		PHI:6268

Chemistry databases

ChEMBL database of bioactive drug-like small molecules

More...ChEMBLi		CHEMBL4603

Drug and drug target database

More...DrugBanki		DB02294, (5R,6S,7S,8S)-5-hydroxymethyl-6,7,8-trihydroxy-tetrazolo[1,5-A]piperidine
DB01920, 1-O-[O-Nitrophenyl]-Beta-D-Galactopyranose
DB02228, 2-deoxy-2-fluoro-Beta-D-galactose
DB04382, 2-Deoxy-alpha-D-galactopyranose
DB04155, 2-Fluoro-2-Deoxy-Beta-D-Galactopyranosyl-Beta-D-Glucopyranose
DB02632, 4-nitrophenyl-beta-D-galactoside
DB04116, Allolactose
DB01885, D-Galctopyranosyl-1-On
DB01862, Isopropyl beta-D-thiogalactopyranoside
DB04465, Lactose
DB04530, S,S-(2-Hydroxyethyl)Thiocysteine
DB13503, Tyrothricin

<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 <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section indicates that the initiator methionine is cleaved from the mature protein.<p><a href='/help/init_met' target='_top'>More...</a></p>Initiator methionineiRemoved1 Publication
<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_00000576502 – 1024Beta-galactosidaseAdd BLAST1023

Proteomic databases

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

More...PaxDbi		P00722

PRoteomics IDEntifications database

More...PRIDEi		P00722

<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

By allolactose.1 Publication

<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

Homotetramer.

4 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection">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="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

P00722
With#Exp.IntAct
itself3EBI-369998,EBI-369998

GO - Molecular functioni

Complete GO annotation on QuickGO ...

Protein-protein interaction databases

Database of interacting proteins

More...DIPi		DIP-10081N

Protein interaction database and analysis system

More...IntActi		P00722, 76 interactors

STRING: functional protein association networks

More...STRINGi		511145.b0344

Chemistry databases

BindingDB database of measured binding affinities

More...BindingDBi		P00722

<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

11024
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

The Protein Circular Dichroism Data Bank

More...PCDDBi		P00722

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

More...SMRi		P00722

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...EvolutionaryTracei		P00722

<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>Regioni538 – 541Substrate binding4

<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 glycosyl hydrolase 2 family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		COG3250, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_002346_0_2_6

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P00722

Database for complete collections of gene phylogenies

More...PhylomeDBi		P00722

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...Gene3Di		2.60.40.10, 2 hits
2.70.98.10, 1 hit

HAMAP database of protein families

More...HAMAPi		MF_01687, Beta_gal, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR004199, B-gal_small/dom_5
IPR036156, Beta-gal/glucu_dom_sf
IPR011013, Gal_mutarotase_sf_dom
IPR008979, Galactose-bd-like_sf
IPR014718, GH-type_carb-bd
IPR006101, Glyco_hydro_2
IPR023232, Glyco_hydro_2_AS
IPR023933, Glyco_hydro_2_beta_Galsidase
IPR006103, Glyco_hydro_2_cat
IPR023230, Glyco_hydro_2_CS
IPR006102, Glyco_hydro_2_Ig-like
IPR006104, Glyco_hydro_2_N
IPR017853, Glycoside_hydrolase_SF
IPR013783, Ig-like_fold
IPR032312, LacZ_4

The PANTHER Classification System

More...PANTHERi		PTHR46323, PTHR46323, 1 hit

Pfam protein domain database

More...Pfami		View protein in Pfam
PF02929, Bgal_small_N, 1 hit
PF16353, DUF4981, 1 hit
PF00703, Glyco_hydro_2, 1 hit
PF02836, Glyco_hydro_2_C, 1 hit
PF02837, Glyco_hydro_2_N, 1 hit

Protein Motif fingerprint database; a protein domain database

More...PRINTSi		PR00132, GLHYDRLASE2

Simple Modular Architecture Research Tool; a protein domain database

More...SMARTi		View protein in SMART
SM01038, Bgal_small_N, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF49303, SSF49303, 2 hits
SSF49785, SSF49785, 1 hit
SSF51445, SSF51445, 1 hit
SSF74650, SSF74650, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS00719, GLYCOSYL_HYDROL_F2_1, 1 hit
PS00608, GLYCOSYL_HYDROL_F2_2, 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.

<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 in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

P00722-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MTMITDSLAV VLQRRDWENP GVTQLNRLAA HPPFASWRNS EEARTDRPSQ 
        60         70         80         90        100
QLRSLNGEWR FAWFPAPEAV PESWLECDLP EADTVVVPSN WQMHGYDAPI 
       110        120        130        140        150
YTNVTYPITV NPPFVPTENP TGCYSLTFNV DESWLQEGQT RIIFDGVNSA 
       160        170        180        190        200
FHLWCNGRWV GYGQDSRLPS EFDLSAFLRA GENRLAVMVL RWSDGSYLED 
       210        220        230        240        250
QDMWRMSGIF RDVSLLHKPT TQISDFHVAT RFNDDFSRAV LEAEVQMCGE 
       260        270        280        290        300
LRDYLRVTVS LWQGETQVAS GTAPFGGEII DERGGYADRV TLRLNVENPK 
       310        320        330        340        350
LWSAEIPNLY RAVVELHTAD GTLIEAEACD VGFREVRIEN GLLLLNGKPL 
       360        370        380        390        400
LIRGVNRHEH HPLHGQVMDE QTMVQDILLM KQNNFNAVRC SHYPNHPLWY 
       410        420        430        440        450
TLCDRYGLYV VDEANIETHG MVPMNRLTDD PRWLPAMSER VTRMVQRDRN 
       460        470        480        490        500
HPSVIIWSLG NESGHGANHD ALYRWIKSVD PSRPVQYEGG GADTTATDII 
       510        520        530        540        550
CPMYARVDED QPFPAVPKWS IKKWLSLPGE TRPLILCEYA HAMGNSLGGF 
       560        570        580        590        600
AKYWQAFRQY PRLQGGFVWD WVDQSLIKYD ENGNPWSAYG GDFGDTPNDR 
       610        620        630        640        650
QFCMNGLVFA DRTPHPALTE AKHQQQFFQF RLSGQTIEVT SEYLFRHSDN 
       660        670        680        690        700
ELLHWMVALD GKPLASGEVP LDVAPQGKQL IELPELPQPE SAGQLWLTVR 
       710        720        730        740        750
VVQPNATAWS EAGHISAWQQ WRLAENLSVT LPAASHAIPH LTTSEMDFCI 
       760        770        780        790        800
ELGNKRWQFN RQSGFLSQMW IGDKKQLLTP LRDQFTRAPL DNDIGVSEAT 
       810        820        830        840        850
RIDPNAWVER WKAAGHYQAE AALLQCTADT LADAVLITTA HAWQHQGKTL 
       860        870        880        890        900
FISRKTYRID GSGQMAITVD VEVASDTPHP ARIGLNCQLA QVAERVNWLG 
       910        920        930        940        950
LGPQENYPDR LTAACFDRWD LPLSDMYTPY VFPSENGLRC GTRELNYGPH 
       960        970        980        990       1000
QWRGDFQFNI SRYSQQQLME TSHRHLLHAE EGTWLNIDGF HMGIGGDDSW 
      1010       1020 
SPSVSAEFQL SAGRYHYQLV WCQK
Length:1,024
Mass (Da):116,483
Last modified:January 23, 2007 - v2
<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:i9D295EF4CEF90B08
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
J01636 Genomic DNA Translation: AAA24053.1
V00296 Genomic DNA Translation: CAA23573.1
U73857 Genomic DNA Translation: AAB18068.1
U00096 Genomic DNA Translation: AAC73447.1
AP009048 Genomic DNA Translation: BAE76126.1
V00295 Genomic DNA Translation: CAA23570.1

Protein sequence database of the Protein Information Resource

More...PIRi		A90981, GBEC

NCBI Reference Sequences

More...RefSeqi		NP_414878.1, NC_000913.3
WP_000177906.1, NZ_SSZK01000061.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...EnsemblBacteriai		AAC73447; AAC73447; b0344
BAE76126; BAE76126; BAE76126

Database of genes from NCBI RefSeq genomes

More...GeneIDi		945006

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		ecj:JW0335
eco:b0344

<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

<p>This subsection of the <a href="http://www.uniprot.org/manual/cross%5Freferences%5Fsection">Cross-references</a> section provides links to various web resources that are relevant for a specific protein.<p><a href='/help/web_resource' target='_top'>More...</a></p>Web resourcesi

Worthington enzyme manual

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
J01636 Genomic DNA Translation: AAA24053.1
V00296 Genomic DNA Translation: CAA23573.1
U73857 Genomic DNA Translation: AAB18068.1
U00096 Genomic DNA Translation: AAC73447.1
AP009048 Genomic DNA Translation: BAE76126.1
V00295 Genomic DNA Translation: CAA23570.1
PIRiA90981, GBEC
RefSeqiNP_414878.1, NC_000913.3
WP_000177906.1, NZ_SSZK01000061.1

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
1DP0X-ray1.70A/B/C/D10-1024[»]
1F4AX-ray2.80A/B/C/D4-1024[»]
1F4HX-ray2.80A/B/C/D4-1024[»]
1HN1X-ray3.00A/B/C/D10-1024[»]
1JYNX-ray1.80A/B/C/D10-1024[»]
1JYVX-ray1.75A/B/C/D10-1024[»]
1JYWX-ray1.55A/B/C/D10-1024[»]
1JYXX-ray1.75A/B/C/D10-1024[»]
1JZ2X-ray2.10A/B/C/D2-1024[»]
1JZ3X-ray1.75A/B/C/D10-1024[»]
1JZ4X-ray2.10A/B/C/D10-1024[»]
1JZ5X-ray1.80A/B/C/D10-1024[»]
1JZ6X-ray2.10A/B/C/D10-1024[»]
1JZ7X-ray1.50A/B/C/D10-1024[»]
1JZ8X-ray1.50A/B/C/D10-1024[»]
1PX3X-ray1.60A/B/C/D10-1024[»]
1PX4X-ray1.60A/B/C/D10-1024[»]
3CZJX-ray2.05A/B/C/D10-1024[»]
3DYMX-ray2.05A/B/C/D10-1024[»]
3DYOX-ray1.80A/B/C/D10-1024[»]
3DYPX-ray1.75A/B/C/D10-1024[»]
3E1FX-ray3.001/2/3/410-1024[»]
3I3BX-ray2.20A/B/C/D10-1024[»]
3I3DX-ray2.20A/B/C/D10-1024[»]
3I3EX-ray2.10A/B/C/D10-1024[»]
3IAPX-ray2.00A/B/C/D10-1024[»]
3IAQX-ray2.70A/B/C/D10-1024[»]
3J7Helectron microscopy3.20A/B/C/D1-1024[»]
3MUYX-ray2.501/2/3/410-1024[»]
3MUZX-ray1.901/2/3/410-1024[»]
3MV0X-ray2.201/2/3/410-1024[»]
3MV1X-ray2.201/2/3/410-1024[»]
3SEPX-ray2.05A/B/C/D10-1024[»]
3T08X-ray2.00A/B/C/D10-1024[»]
3T09X-ray1.75A/B/C/D10-1024[»]
3T0AX-ray1.90A/B/C/D10-1024[»]
3T0BX-ray2.40A/B/C/D10-1024[»]
3T0DX-ray1.93A/B/C/D10-1024[»]
3T2OX-ray1.85A/B/C/D10-1024[»]
3T2PX-ray2.60A/B/C/D10-1024[»]
3T2QX-ray2.40A/B/C/D10-1024[»]
3VD3X-ray2.80A/B/C/D10-1024[»]
3VD4X-ray2.00A/B/C/D10-1024[»]
3VD5X-ray2.70A/B/C/D10-1024[»]
3VD7X-ray2.87A/B/C/D10-1024[»]
3VD9X-ray2.05A/B/C/D10-1024[»]
3VDAX-ray2.50A/B/C/D10-1024[»]
3VDBX-ray2.05A/B/C/D10-1024[»]
3VDCX-ray2.55A/B/C/D10-1024[»]
4CKDelectron microscopy13.00A/B/C/D1-1024[»]
4DUVX-ray2.10A/B/C/D10-1024[»]
4DUWX-ray2.20A/B/C/D10-1024[»]
4DUXX-ray2.30A/B/C/D10-1024[»]
4TTGX-ray1.60A/B/C/D15-1024[»]
4V40X-ray2.50A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P2-1024[»]
4V41X-ray2.50A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P2-1024[»]
4V44X-ray2.70A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P2-1024[»]
4V45X-ray2.60A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P2-1024[»]
5A1Aelectron microscopy2.20A/B/C/D3-1024[»]
6CVMelectron microscopy1.90A/B/C/D3-1023[»]
6DRVelectron microscopy2.20A/B/C/D1-1024[»]
6KUZX-ray2.83A/B/C/D1-1024[»]
6TSHelectron microscopy2.30A/B/C/D10-1024[»]
6TSKelectron microscopy2.30A/B/C/D10-1024[»]
6TTEelectron microscopy2.20A/B/C/D10-1024[»]
6X1Qelectron microscopy1.80A/B/C/D3-1023[»]
7BRSX-ray2.67A/B/C/D1-1024[»]
7BTKX-ray2.70A/B/C/D1-1024[»]
PCDDBiP00722
SMRiP00722
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

DIPiDIP-10081N
IntActiP00722, 76 interactors
STRINGi511145.b0344

Chemistry databases

BindingDBiP00722
ChEMBLiCHEMBL4603
DrugBankiDB02294, (5R,6S,7S,8S)-5-hydroxymethyl-6,7,8-trihydroxy-tetrazolo[1,5-A]piperidine
DB01920, 1-O-[O-Nitrophenyl]-Beta-D-Galactopyranose
DB02228, 2-deoxy-2-fluoro-Beta-D-galactose
DB04382, 2-Deoxy-alpha-D-galactopyranose
DB04155, 2-Fluoro-2-Deoxy-Beta-D-Galactopyranosyl-Beta-D-Glucopyranose
DB02632, 4-nitrophenyl-beta-D-galactoside
DB04116, Allolactose
DB01885, D-Galctopyranosyl-1-On
DB01862, Isopropyl beta-D-thiogalactopyranoside
DB04465, Lactose
DB04530, S,S-(2-Hydroxyethyl)Thiocysteine
DB13503, Tyrothricin

Protein family/group databases

CAZyiGH2, Glycoside Hydrolase Family 2

Proteomic databases

PaxDbiP00722
PRIDEiP00722

Protocols and materials databases

ABCD curated depository of sequenced antibodies

More...ABCDi		P00722, 6 sequenced antibodies

Genome annotation databases

EnsemblBacteriaiAAC73447; AAC73447; b0344
BAE76126; BAE76126; BAE76126
GeneIDi945006
KEGGiecj:JW0335
eco:b0344

Organism-specific databases

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

More...EchoBASEi		EB0522

Phylogenomic databases

eggNOGiCOG3250, Bacteria
HOGENOMiCLU_002346_0_2_6
InParanoidiP00722
PhylomeDBiP00722

Enzyme and pathway databases

BioCyciEcoCyc:BETAGALACTOSID-MONOMER
BRENDAi3.2.1.23, 2026
SABIO-RKiP00722

Miscellaneous databases

EvolutionaryTraceiP00722
PHI-baseiPHI:6268

Protein Ontology

More...PROi		PR:P00722

Family and domain databases

Gene3Di2.60.40.10, 2 hits
2.70.98.10, 1 hit
HAMAPiMF_01687, Beta_gal, 1 hit
InterProiView protein in InterPro
IPR004199, B-gal_small/dom_5
IPR036156, Beta-gal/glucu_dom_sf
IPR011013, Gal_mutarotase_sf_dom
IPR008979, Galactose-bd-like_sf
IPR014718, GH-type_carb-bd
IPR006101, Glyco_hydro_2
IPR023232, Glyco_hydro_2_AS
IPR023933, Glyco_hydro_2_beta_Galsidase
IPR006103, Glyco_hydro_2_cat
IPR023230, Glyco_hydro_2_CS
IPR006102, Glyco_hydro_2_Ig-like
IPR006104, Glyco_hydro_2_N
IPR017853, Glycoside_hydrolase_SF
IPR013783, Ig-like_fold
IPR032312, LacZ_4
PANTHERiPTHR46323, PTHR46323, 1 hit
PfamiView protein in Pfam
PF02929, Bgal_small_N, 1 hit
PF16353, DUF4981, 1 hit
PF00703, Glyco_hydro_2, 1 hit
PF02836, Glyco_hydro_2_C, 1 hit
PF02837, Glyco_hydro_2_N, 1 hit
PRINTSiPR00132, GLHYDRLASE2
SMARTiView protein in SMART
SM01038, Bgal_small_N, 1 hit
SUPFAMiSSF49303, SSF49303, 2 hits
SSF49785, SSF49785, 1 hit
SSF51445, SSF51445, 1 hit
SSF74650, SSF74650, 1 hit
PROSITEiView protein in PROSITE
PS00719, GLYCOSYL_HYDROL_F2_1, 1 hit
PS00608, GLYCOSYL_HYDROL_F2_2, 1 hit

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 nameiBGAL_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: P00722
Secondary accession number(s): Q2MC80
<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: July 21, 1986
Last sequence update: January 23, 2007
Last modified: February 23, 2022
This is version 210 of the entry and version 2 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, Direct protein sequencing, Reference proteome

Documents

  1. Glycosyl hydrolases
    Classification of glycosyl hydrolase families and list of entries
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. SIMILARITY comments
    Index of protein domains and families
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