Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
The new UniProt website is here! Take me to UniProt BETA

UniProtKB - P69795 (PTQB_ECOLI)

Entry version 126 (25 May 2022)
Sequence version 1 (10 May 2005)
Previous versions | rss
Add a publicationFeedback
Protein

PTS system N,N'-diacetylchitobiose-specific EIIB component

Gene

chbB

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

The phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS), a major carbohydrate active transport system, catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The enzyme II ChbABC PTS system is involved in the transport of the chitin disaccharide N,N'-diacetylchitobiose (GlcNAc2) (PubMed:10913117).

Also able to use N,N',N''-triacetyl chitotriose (GlcNAc3) (PubMed:10913117, PubMed:10913119).

1 Publication2 Publications

Caution

Was originally (PubMed:2092358) characterized as part of a cryptic cel operon for a cellobiose degradation system. The Cel+ phenotype is due to mutations making expression chitobiose-independent and altering the substrate specificity.1 Publication

<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

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<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 sitei10Phosphocysteine intermediate5 Publications2 Publications1

<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

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 functionKinase, Transferase
Biological processPhosphotransferase system, Sugar transport, Transport

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...BioCyci		EcoCyc:CELA-MONOMER

BRENDA Comprehensive Enzyme Information System

More...BRENDAi		2.7.1.196, 2026

Protein family/group databases

Transport Classification Database

More...TCDBi		4.A.3.2.1, the pts lactose-n,n'-diacetylchitobiose-Beta-glucoside (lac) family

<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:
PTS system N,N'-diacetylchitobiose-specific EIIB component1 Publication
Alternative name(s):
EIIB-Chb1 Publication
IVcel1 Publication
N,N'-diacetylchitobiose-specific phosphotransferase enzyme IIB component1 Publication (EC:2.7.1.1962 Publications)
<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:chbB1 Publication
Synonyms:celA1 Publication
Ordered Locus Names:b1738, JW1727
<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

Keywords - Cellular componenti

Cytoplasm

<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>Mutagenesisi10C → S: Unable to be phosphorylated by EIIA. 2 Publications1

Chemistry databases

Drug and drug target database

More...DrugBanki		DB03544, S-Phosphocysteine

<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 or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001864891 – 106PTS system N,N'-diacetylchitobiose-specific EIIB componentAdd BLAST106

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei10Phosphocysteine; by EIIAPROSITE-ProRule annotation1 Publication1

Keywords - PTMi

Phosphoprotein

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...jPOSTi		P69795

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

More...PaxDbi		P69795

PRoteomics IDEntifications database

More...PRIDEi		P69795

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...iPTMneti		P69795

<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 GlcNAc2, GlcNAc3 and beta-N,N'-diacetylchitobiose (Me-TCB).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

Forms a complex with ChbA (EIIA) (PubMed:10913119, PubMed:10913122, PubMed:19959833). ChbB is a monomer in both its unphosphorylated and phosphorylated forms (PubMed:10913122).

3 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

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		4260316, 17 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...ComplexPortali		CPX-4683, N,N'-diacetylchitobiose-specific enzyme II complex

Protein interaction database and analysis system

More...IntActi		P69795, 2 interactors

STRING: functional protein association networks

More...STRINGi		511145.b1738

<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

1106
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

AlphaFold Protein Structure Database

More...AlphaFoldDBi		P69795

Biological Magnetic Resonance Data Bank

More...BMRBi		P69795

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

More...SMRi		P69795

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		P69795

<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

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini3 – 106PTS EIIB type-3PROSITE-ProRule annotationAdd BLAST104

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The PTS EIIB type-3 domain is phosphorylated by phospho-EIIA on a cysteinyl residue. Then, it transfers the phosphoryl group to the sugar substrate concomitantly with the sugar uptake processed by the PTS EIIC type-3 domain.PROSITE-ProRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		COG1440, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_147323_2_0_6

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P69795

Identification of Orthologs from Complete Genome Data

More...OMAi		DAEIFAC

Database for complete collections of gene phylogenies

More...PhylomeDBi		P69795

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR036095, PTS_EIIB-like_sf
IPR003501, PTS_EIIB_2/3
IPR013012, PTS_EIIB_3

Pfam protein domain database

More...Pfami		View protein in Pfam
PF02302, PTS_IIB, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF52794, SSF52794, 1 hit

TIGRFAMs; a protein family database

More...TIGRFAMsi		TIGR00853, pts-lac, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS51100, PTS_EIIB_TYPE_3, 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.

P69795-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MEKKHIYLFC SAGMSTSLLV SKMRAQAEKY EVPVIIEAFP ETLAGEKGQN 
        60         70         80         90        100
ADVVLLGPQI AYMLPEIQRL LPNKPVEVID SLLYGKVDGL GVLKAAVAAI 

KKAAAN
Length:106
Mass (Da):11,427
Last modified:May 10, 2005 - 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:iDE4AADE300D18F53
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
X52890 Genomic DNA Translation: CAA37069.1
U00096 Genomic DNA Translation: AAC74808.1
AP009048 Genomic DNA Translation: BAA15519.1

Protein sequence database of the Protein Information Resource

More...PIRi		S10870

NCBI Reference Sequences

More...RefSeqi		NP_416252.1, NC_000913.3
WP_000412169.1, NZ_STEB01000009.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...EnsemblBacteriai		AAC74808; AAC74808; b1738
BAA15519; BAA15519; BAA15519

Database of genes from NCBI RefSeq genomes

More...GeneIDi		67415558
945339

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		ecj:JW1727
eco:b1738

Pathosystems Resource Integration Center (PATRIC)

More...PATRICi		fig|1411691.4.peg.518

<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
X52890 Genomic DNA Translation: CAA37069.1
U00096 Genomic DNA Translation: AAC74808.1
AP009048 Genomic DNA Translation: BAA15519.1
PIRiS10870
RefSeqiNP_416252.1, NC_000913.3
WP_000412169.1, NZ_STEB01000009.1

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
1E2BNMR-A1-106[»]
1H9CNMR-A1-106[»]
1IIBX-ray1.80A/B1-106[»]
2WWVNMR-D3-105[»]
2WY2NMR-D3-105[»]
AlphaFoldDBiP69795
BMRBiP69795
SMRiP69795
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi4260316, 17 interactors
ComplexPortaliCPX-4683, N,N'-diacetylchitobiose-specific enzyme II complex
IntActiP69795, 2 interactors
STRINGi511145.b1738

Chemistry databases

DrugBankiDB03544, S-Phosphocysteine

Protein family/group databases

TCDBi4.A.3.2.1, the pts lactose-n,n'-diacetylchitobiose-Beta-glucoside (lac) family

PTM databases

iPTMnetiP69795

Proteomic databases

jPOSTiP69795
PaxDbiP69795
PRIDEiP69795

Genome annotation databases

EnsemblBacteriaiAAC74808; AAC74808; b1738
BAA15519; BAA15519; BAA15519
GeneIDi67415558
945339
KEGGiecj:JW1727
eco:b1738
PATRICifig|1411691.4.peg.518

Organism-specific databases

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

More...EchoBASEi		EB0138

Phylogenomic databases

eggNOGiCOG1440, Bacteria
HOGENOMiCLU_147323_2_0_6
InParanoidiP69795
OMAiDAEIFAC
PhylomeDBiP69795

Enzyme and pathway databases

BioCyciEcoCyc:CELA-MONOMER
BRENDAi2.7.1.196, 2026

Miscellaneous databases

EvolutionaryTraceiP69795

Protein Ontology

More...PROi		PR:P69795

Family and domain databases

InterProiView protein in InterPro
IPR036095, PTS_EIIB-like_sf
IPR003501, PTS_EIIB_2/3
IPR013012, PTS_EIIB_3
PfamiView protein in Pfam
PF02302, PTS_IIB, 1 hit
SUPFAMiSSF52794, SSF52794, 1 hit
TIGRFAMsiTIGR00853, pts-lac, 1 hit
PROSITEiView protein in PROSITE
PS51100, PTS_EIIB_TYPE_3, 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 nameiPTQB_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: P69795
Secondary accession number(s): P17409
<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: May 10, 2005
Last sequence update: May 10, 2005
Last modified: May 25, 2022
This is version 126 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, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again