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Entry version 108 (07 Apr 2021)
Sequence version 2 (14 Apr 2009)
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Protein

K(+)/H(+) antiporter subunit KhtU

Gene

khtU

Organism
Bacillus subtilis (strain 168)
Status
Reviewed-Annotation score:

Annotation score:4 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

Potassium/proton antiporter that mediates the efflux of potassium ions from the cell (PubMed:17679694).

Can also mediate rubidium/proton antiport, but has no permeability for sodium or lithium ions. In the absence of KhtT, does not have antiport activity, but can catalyze potassium efflux (PubMed:14987767, PubMed:17679694).

Involved in protection of the cell from methylglyoxal, a toxic by-product of glycolysis, via activation by S-lactoyl-BSH of the antiporter activity, leading to cytoplasmic acidification and methylglyoxal resistance (PubMed:24330391).

3 Publications

<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

Potassium antiport activity requires the presence of KhtT. Activity is also modulated by KhtS. Has higher activity at alkaline pH.2 Publications

<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

Biological processAntiport, Ion transport, Potassium transport, Transport
LigandPotassium

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
BSUB:BSU09850-MONOMER

Protein family/group databases

Transport Classification Database

More...
TCDBi
2.A.37.5.2, the monovalent cation:proton antiporter-2 (cpa2) 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:
K(+)/H(+) antiporter subunit KhtUCurated
<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:khtU1 Publication
Synonyms:yhaU
Ordered Locus Names:BSU09850
<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>OrganismiBacillus subtilis (strain 168)
<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 identifieri224308 [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 lineageiBacteriaFirmicutesBacilliBacillalesBacillaceaeBacillus
<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
  • UP000001570 <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

<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

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei3 – 23HelicalSequence analysisAdd BLAST21
Transmembranei29 – 49HelicalSequence analysisAdd BLAST21
Transmembranei60 – 80HelicalSequence analysisAdd BLAST21
Transmembranei85 – 105HelicalSequence analysisAdd BLAST21
Transmembranei108 – 128HelicalSequence analysisAdd BLAST21
Transmembranei153 – 173HelicalSequence analysisAdd BLAST21
Transmembranei183 – 203HelicalSequence analysisAdd BLAST21
Transmembranei222 – 242HelicalSequence analysisAdd BLAST21
Transmembranei268 – 288HelicalSequence analysisAdd BLAST21
Transmembranei297 – 317HelicalSequence analysisAdd BLAST21
Transmembranei332 – 352HelicalSequence analysisAdd BLAST21
Transmembranei357 – 377HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

Cell membrane, Membrane

<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

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Deletion mutant is more sensitive to methylglyoxal than wild-type.1 Publication

<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_00003608341 – 405K(+)/H(+) antiporter subunit KhtUAdd BLAST405

Proteomic databases

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

More...
PaxDbi
O07536

<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

Part of the khtSTU operon. Induced by salt stress at alkaline pH.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

The transporter is composed of the integral membrane protein KhtU and the regulatory protein KhtT.

2 Publications

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
224308.BSU09850

<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

<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

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

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eggNOGi
COG0475, Bacteria

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
O07536

Identification of Orthologs from Complete Genome Data

More...
OMAi
CVGAKTD

Database for complete collections of gene phylogenies

More...
PhylomeDBi
O07536

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.1530.20, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006153, Cation/H_exchanger
IPR038770, Na+/solute_symporter_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00999, Na_H_Exchanger, 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.

O07536-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MDHLVFEVGT ALVLVAIASV IANKIKFSII PFLIVLGMLV GPHAPKMGII
60 70 80 90 100
DLTFIQSSEI IEFFGRMGVL FLLFYLGLEF SVGKLIKSGK SIAVGGTIYI
110 120 130 140 150
LINFSLGLLY GFITGFSFLE VLILAGVITI SSSAIVAKVL VDLKRTANPE
160 170 180 190 200
TELILGIIMF EDIFLAVYLS VVSGLILGDA TSVGSALLSI LIAFGYMLLF
210 220 230 240 250
FIAARKLPPL LNKLLDIRSN EVFIIVIFAA LFFIAGFSET IHVAEAIGAL
260 270 280 290 300
LLGLVFSETE HSDRIEHLVV PFRDFFGAMF FFSFGLSIDP FSLGEAVWLA
310 320 330 340 350
LGAVILTILG NFIAGMVAGR RAGLSHKASS NIGLTIVSRG EFSIIVANLG
360 370 380 390 400
IAGGLSATLK PFAALYVLIL AILGPLVTKE SKRIYRLLNK VFKWKPEVQP

AKKQG
Length:405
Mass (Da):43,637
Last modified:April 14, 2009 - 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:i4C76AEABA3A685A7
GO

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence CAA74453 differs from that shown. Reason: Erroneous initiation.Curated

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
Y14080 Genomic DNA Translation: CAA74453.1 Different initiation.
AL009126 Genomic DNA Translation: CAB12825.2

Protein sequence database of the Protein Information Resource

More...
PIRi
G69819

NCBI Reference Sequences

More...
RefSeqi
NP_388866.2, NC_000964.3
WP_003233272.1, NZ_JNCM01000035.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
CAB12825; CAB12825; BSU_09850

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
939761

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
bsu:BSU09850

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|224308.179.peg.1057

<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
Y14080 Genomic DNA Translation: CAA74453.1 Different initiation.
AL009126 Genomic DNA Translation: CAB12825.2
PIRiG69819
RefSeqiNP_388866.2, NC_000964.3
WP_003233272.1, NZ_JNCM01000035.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Protein-protein interaction databases

STRINGi224308.BSU09850

Protein family/group databases

TCDBi2.A.37.5.2, the monovalent cation:proton antiporter-2 (cpa2) family

Proteomic databases

PaxDbiO07536

Genome annotation databases

EnsemblBacteriaiCAB12825; CAB12825; BSU_09850
GeneIDi939761
KEGGibsu:BSU09850
PATRICifig|224308.179.peg.1057

Phylogenomic databases

eggNOGiCOG0475, Bacteria
InParanoidiO07536
OMAiCVGAKTD
PhylomeDBiO07536

Enzyme and pathway databases

BioCyciBSUB:BSU09850-MONOMER

Family and domain databases

Gene3Di1.20.1530.20, 1 hit
InterProiView protein in InterPro
IPR006153, Cation/H_exchanger
IPR038770, Na+/solute_symporter_sf
PfamiView protein in Pfam
PF00999, Na_H_Exchanger, 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 nameiKHTU_BACSU
<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: O07536
Secondary accession number(s): Q796V7
<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: January 20, 2009
Last sequence update: April 14, 2009
Last modified: April 7, 2021
This is version 108 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

Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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