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Entry version 81 (25 May 2022)
Sequence version 1 (01 Jul 1997)
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Protein

Electrogenic sodium bicarbonate cotransporter 1

Gene

SLC4A4

Organism
Ambystoma tigrinum (Eastern tiger salamander)
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 transcript 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

Electrogenic sodium/bicarbonate cotransporter with a Na+:HCO3- stoichiometry varying from 1:2 to 1:3. May regulate bicarbonate influx/efflux at the basolateral membrane of cells and regulate intracellular pH.

1 Publication

<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 processIon transport, Sodium transport, Symport, Transport
LigandSodium

<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:
Electrogenic sodium bicarbonate cotransporter 1
Short name:
Sodium bicarbonate cotransporter
Alternative name(s):
Na(+)/HCO3(-) cotransporter
Solute carrier family 4 member 4
<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:SLC4A4
Synonyms:NBC, NBCE1
<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>OrganismiAmbystoma tigrinum (Eastern tiger salamander)
<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 identifieri8305 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaCaudataSalamandroideaAmbystomatidaeAmbystoma

<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 subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini1 – 421CytoplasmicBy similarityAdd BLAST421
<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>Transmembranei422 – 446Helical; Name=1By similarityAdd BLAST25
Topological domaini447 – 456ExtracellularBy similarity10
Transmembranei457 – 475Helical; Name=2By similarityAdd BLAST19
Topological domaini476CytoplasmicBy similarity1
Transmembranei477 – 497Discontinuously helical; Name=3By similarityAdd BLAST21
Topological domaini498 – 505ExtracellularBy similarity8
Transmembranei506 – 526Helical; Name=4By similarityAdd BLAST21
Topological domaini527 – 540CytoplasmicBy similarityAdd BLAST14
Transmembranei541 – 564Helical; Name=5By similarityAdd BLAST24
Topological domaini565 – 648ExtracellularBy similarityAdd BLAST84
Transmembranei649 – 666Helical; Name=6By similarityAdd BLAST18
Topological domaini667 – 681CytoplasmicBy similarityAdd BLAST15
Transmembranei682 – 701Helical; Name=7By similarityAdd BLAST20
Topological domaini702 – 735ExtracellularBy similarityAdd BLAST34
Transmembranei736 – 763Helical; Name=8By similarityAdd BLAST28
Topological domaini764 – 775CytoplasmicBy similarityAdd BLAST12
Transmembranei776 – 792Helical; Name=9By similarityAdd BLAST17
Topological domaini793ExtracellularBy similarity1
Transmembranei794 – 811Discontinuously helical; Name=10By similarityAdd BLAST18
Topological domaini812 – 833CytoplasmicBy similarityAdd BLAST22
Transmembranei834 – 850Helical; Name=11By similarityAdd BLAST17
Topological domaini851 – 857ExtracellularBy similarity7
Transmembranei858 – 874Helical; Name=12By similarityAdd BLAST17
Topological domaini875 – 916CytoplasmicBy similarityAdd BLAST42
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a region that is buried within a membrane, but does not cross it.<p><a href='/help/intramem' target='_top'>More...</a></p>Intramembranei917 – 942Discontinuously helicalBy similarityAdd BLAST26
Topological domaini943 – 1035CytoplasmicBy similarityAdd BLAST93

Keywords - Cellular componenti

Cell membrane, Membrane

<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_00000792321 – 1035Electrogenic sodium bicarbonate cotransporter 1Add BLAST1035

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi582 ↔ 584By similarity
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi591N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi596N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi609N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi617N-linked (GlcNAc...) asparagineSequence analysis1
Disulfide bondi630 ↔ 642By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein

<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 provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Expressed in kidney and to a lower extent in bladder, brain, intestine, large intestine and eye.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

Homodimer.

By similarity

<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

3D structure databases

AlphaFold Protein Structure Database

More...
AlphaFoldDBi
O13134

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

More...
SMRi
O13134

Database of comparative protein structure models

More...
ModBasei
Search...

<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>Regioni192 – 222DisorderedSequence analysisAdd BLAST31
Regioni348 – 389DisorderedSequence analysisAdd BLAST42
Regioni968 – 1035DisorderedSequence analysisAdd BLAST68

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular type of amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi192 – 217Polar residuesSequence analysisAdd BLAST26
Compositional biasi968 – 995Basic and acidic residuesSequence analysisAdd BLAST28
Compositional biasi1009 – 1035Basic and acidic residuesSequence analysisAdd BLAST27

<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

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.40.930.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR013769, Band3_cytoplasmic_dom
IPR011531, HCO3_transpt-like_TM_dom
IPR003020, HCO3_transpt_euk
IPR003024, Na/HCO3_transpt
IPR016152, PTrfase/Anion_transptr

The PANTHER Classification System

More...
PANTHERi
PTHR11453, PTHR11453, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF07565, Band_3_cyto, 1 hit
PF00955, HCO3_cotransp, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01231, HCO3TRNSPORT
PR01232, NAHCO3TRSPRT

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF55804, SSF55804, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00834, ae, 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.

O13134-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSSEKECLEN MLNGYAESGR VLSRTSLVIN QAVNRSIFTS TVSPAAERIR
60 70 80 90 100
FILGEEDDSP APPQLFTELD ELLAVDGQEM EWKETARWIK FEEKVEQGGE
110 120 130 140 150
RWSKPHVATL SLHSLFELRT CIEKGTILLD LEATSLPQIV EIVINNQIEL
160 170 180 190 200
GLLKADMKEN VTRTLLRKHR HQTKKSNLRS LADIGKTVSS ASRLFSTPDN
210 220 230 240 250
GSPTMTHRNL TSTSLNDVSD KPDKEQLKNK FMKKLPRDAE ASNVLVGEVD
260 270 280 290 300
FLESPFIAFV RLQQAVMLGS LTEVPVPTRF LFILLGPKGK AKSYHEIGRS
310 320 330 340 350
IATLMSDEVF HDIAYKAKNR EDLIAGIDEF LDEVIVLPLG EWDPTIRIEP
360 370 380 390 400
PKSLPSSDKR KNMYSGGDNL QMNGDAPHDD GGGGHGDSEE LQRTGRFCGG
410 420 430 440 450
LIKDIQRKAP FFASDFYDAL SIQSLSAILF IYLGTVTNAI TFGGLLGDAT
460 470 480 490 500
ENMQGVLESF LGTAVSGAVF CLFGGQPLTI LSSTGPVLVF ERLLFNFSKD
510 520 530 540 550
NDFDYLEFRL WIGLWSAFQC LILVATDASF LVKYFTRFTE EGFSSLISFI
560 570 580 590 600
FIYDAFKKMI KLADYYPINS HFKVDYITQY SCACFPPEPA NSSWFNMTTA
610 620 630 640 650
ATTTQFLTNA STDMAYNGTI DWSLLSKKEC LKYGGLLVGS NCKYVPDITL
660 670 680 690 700
MSFILFLGTY TCSMALKKFK TSRYFPTTAR KLISDFAIIL SILIFCGLDA
710 720 730 740 750
LLGVDTPKLI VPSEFKPTSP NRGWFVPPFG GNPWWVYLAA AIPALLVTIL
760 770 780 790 800
IFMDQQITGV IVNRKEHKLK KGAGYHLDLF WVAILMVVCS FMALPWYVAA
810 820 830 840 850
TVISIAHIDS LKMETETSAP GEQPKFLGVR EQRVTGTVVF LLTGLSVFMA
860 870 880 890 900
PILKFIPMPV LYGVFLYMGV ASLNGVQFMD RLKLLLMPPK YQPDFIYLRH
910 920 930 940 950
VPLRRVHLFT FLQVVCLAML WILKSTVAAI IFPVMILALV AVRKAMDYFF
960 970 980 990 1000
SQHDLSFLDD VIPEKDKKKK EDEKKKKKKK GSIDSDVEDS DCPYPEKVPS
1010 1020 1030
IKIPMDIMEK EPFLIDSKPS DRENSPTFLE RHTSC
Length:1,035
Mass (Da):116,108
Last modified:July 1, 1997 - 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:i3CF50B31275A81AF
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
AF001958 mRNA Translation: AAB61339.1

Protein sequence database of the Protein Information Resource

More...
PIRi
T31336

<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
AF001958 mRNA Translation: AAB61339.1
PIRiT31336

3D structure databases

AlphaFoldDBiO13134
SMRiO13134
ModBaseiSearch...

Family and domain databases

Gene3Di3.40.930.10, 1 hit
InterProiView protein in InterPro
IPR013769, Band3_cytoplasmic_dom
IPR011531, HCO3_transpt-like_TM_dom
IPR003020, HCO3_transpt_euk
IPR003024, Na/HCO3_transpt
IPR016152, PTrfase/Anion_transptr
PANTHERiPTHR11453, PTHR11453, 1 hit
PfamiView protein in Pfam
PF07565, Band_3_cyto, 1 hit
PF00955, HCO3_cotransp, 1 hit
PRINTSiPR01231, HCO3TRNSPORT
PR01232, NAHCO3TRSPRT
SUPFAMiSSF55804, SSF55804, 1 hit
TIGRFAMsiTIGR00834, ae, 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 nameiS4A4_AMBTI
<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: O13134
<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: December 20, 2005
Last sequence update: July 1, 1997
Last modified: May 25, 2022
This is version 81 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 programChordata 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

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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