Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Entry version 108 (08 May 2019)
Sequence version 1 (01 Nov 1996)
Previous versions | rss
Other tutorials and videosHelp videoFeedback
Protein

Occludin

Gene

OCLN

Organism
Canis lupus familiaris (Dog) (Canis familiaris)
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

May play a role in the formation and regulation of the tight junction (TJ) paracellular permeability barrier. Interacts with ZO-1.

<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 - Biological processi

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Occludin
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:OCLN
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiCanis lupus familiaris (Dog) (Canis familiaris)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9615 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCarnivoraCaniformiaCanidaeCanis
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000002254 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Unplaced

<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

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'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 – 66CytoplasmicSequence analysisAdd BLAST66
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'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>Transmembranei67 – 89HelicalSequence analysisAdd BLAST23
Topological domaini90 – 134ExtracellularSequence analysisAdd BLAST45
Transmembranei135 – 159HelicalSequence analysisAdd BLAST25
Topological domaini160 – 169CytoplasmicSequence analysis10
Transmembranei170 – 194HelicalSequence analysisAdd BLAST25
Topological domaini195 – 242ExtracellularSequence analysisAdd BLAST48
Transmembranei243 – 264HelicalSequence analysisAdd BLAST22
Topological domaini265 – 521CytoplasmicSequence analysisAdd BLAST257

<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>Keywords - Cellular componenti

Cell junction, Cell membrane, Membrane, Tight junction

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001467381 – 521OccludinAdd BLAST521

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 bondi215 ↔ 236PROSITE-ProRule annotation
<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 residuei301PhosphoserineBy similarity1
Modified residuei304PhosphothreonineBy similarity1
Modified residuei312PhosphoserineBy similarity1
Modified residuei320PhosphoserineBy similarity1
Modified residuei339PhosphoserineBy similarity1
Modified residuei367PhosphotyrosineBy similarity1
Modified residuei368PhosphoserineBy similarity1
Modified residuei369PhosphoserineBy similarity1
Modified residuei397PhosphotyrosineBy similarity1
Modified residuei401PhosphotyrosineBy similarity1
Modified residuei402Phosphothreonine; by PKC/PRKCHBy similarity1
Modified residuei403Phosphothreonine; by PKC/PRKCHBy similarity1
Modified residuei407PhosphoserineBy similarity1
Modified residuei489PhosphoserineBy similarity1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Dephosphorylated by PTPRJ (By similarity). Less-phosphorylated forms are found in basolateral membrane, cytosol and tight junction. More-heavily phosphorylated forms are concentrated exclusively in tight junction.By similarity1 Publication

Keywords - PTMi

Disulfide bond, Phosphoprotein

Proteomic databases

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

More...
PaxDbi
Q28269

PRoteomics IDEntifications database

More...
PRIDEi
Q28269

<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

Localized at tight junctions of both epithelial and endothelial cells.

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Interacts with TJP1/ZO1 and with VAPA. Interacts with CLDN1, CLDN6, CLDN9, CLDN11, CLDN12 and CLDN17.By similarity

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

WithEntry#Exp.IntActNotes
PRKCHP247232EBI-16222162,EBI-2865850From Homo sapiens.

Protein-protein interaction databases

Database of interacting proteins

More...
DIPi
DIP-48669N

Protein interaction database and analysis system

More...
IntActi
Q28269, 1 interactor

STRING: functional protein association networks

More...
STRINGi
9612.ENSCAFP00000011546

<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

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

More...
SMRi
Q28269

Database of comparative protein structure models

More...
ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
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

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">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>Domaini60 – 268MARVELPROSITE-ProRule annotationAdd BLAST209

Coiled coil

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and domains’ section denotes the positions of regions of coiled coil within the protein.<p><a href='/help/coiled' target='_top'>More...</a></p>Coiled coili424 – 488Sequence analysisAdd BLAST65

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 amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi92 – 130Gly/Tyr-richAdd BLAST39
Compositional biasi308 – 311Poly-Pro4

<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 C-terminal is cytoplasmic and is important for interaction with ZO-1. Necessary for the tight junction localization. Involved in the regulation of the permeability barrier function of the tight junction (By similarity).By similarity

<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 ELL/occludin family.Curated

Keywords - Domaini

Coiled coil, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG410IGK8 Eukaryota
ENOG4110E0E LUCA

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q28269

KEGG Orthology (KO)

More...
KOi
K06088

Database of Orthologous Groups

More...
OrthoDBi
710557at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd06174 MFS, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR031176 ELL/occludin
IPR008253 Marvel
IPR020846 MFS_dom
IPR002958 Occludin
IPR010844 Occludin_ELL

The PANTHER Classification System

More...
PANTHERi
PTHR23288 PTHR23288, 1 hit
PTHR23288:SF4 PTHR23288:SF4, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01284 MARVEL, 1 hit
PF07303 Occludin_ELL, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF005993 Occludin, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01258 OCCLUDIN

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51225 MARVEL, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>.<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

Q28269-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSSRPFESPP PYRPDEFKPN HYAPSNDVYG GDMHVRPMLS QPAYSFYPED
60 70 80 90 100
EILHFYKWTS PPGVIRILSM LVIVMCIAIF GCVASTLAWD RGYGTGLMGG
110 120 130 140 150
SIGYPYGSGF GSYGTGYGYG FGYGYGYGGY TDPRAAKGFL LAMVAFCFIA
160 170 180 190 200
ALVIFVTSVI RSDISRTRRY YLTVIILSAF LGVMMFIATI VYIMGVNPTA
210 220 230 240 250
QASGSLYSSQ IYAMCNQFYA STATGLYMDQ YLYHYCVVDP QEAIAIVLGF
260 270 280 290 300
MVIVAFALII FFAVKTRRKM DRYDKSNILW DKEHIYDEQP PNVEEWVKNV
310 320 330 340 350
SAGTQDMPPP PSDYVERVDS PMAYSSNGKV NDKRLYPESS YKSTPVPEVV
360 370 380 390 400
QELPATSPAD DFRQPRYSSS GHLEPPSKRA PSKGRTGRPK RLEQDHYETD
410 420 430 440 450
YTTGGESCDE LEEDWIREYP PITSDQQRQL YKRNFDTGLQ EYKSLQAELD
460 470 480 490 500
EINKELSRLD KELDDYREES EEYMAAADEY NRLKQVKGSP DYKNKRNYCK
510 520
QLKSKLSHIK KMVGDYDRQK T
Length:521
Mass (Da):59,275
Last modified:November 1, 1996 - 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:i2875E59F8F0A1FFA
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
U49221 mRNA Translation: AAC48582.1

NCBI Reference Sequences

More...
RefSeqi
NP_001003195.1, NM_001003195.1

Genome annotation databases

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
403844

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
cfa:403844

<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
U49221 mRNA Translation: AAC48582.1
RefSeqiNP_001003195.1, NM_001003195.1

3D structure databases

SMRiQ28269
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

DIPiDIP-48669N
IntActiQ28269, 1 interactor
STRINGi9612.ENSCAFP00000011546

Proteomic databases

PaxDbiQ28269
PRIDEiQ28269

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi403844
KEGGicfa:403844

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
100506658

Phylogenomic databases

eggNOGiENOG410IGK8 Eukaryota
ENOG4110E0E LUCA
InParanoidiQ28269
KOiK06088
OrthoDBi710557at2759

Family and domain databases

CDDicd06174 MFS, 1 hit
InterProiView protein in InterPro
IPR031176 ELL/occludin
IPR008253 Marvel
IPR020846 MFS_dom
IPR002958 Occludin
IPR010844 Occludin_ELL
PANTHERiPTHR23288 PTHR23288, 1 hit
PTHR23288:SF4 PTHR23288:SF4, 1 hit
PfamiView protein in Pfam
PF01284 MARVEL, 1 hit
PF07303 Occludin_ELL, 1 hit
PIRSFiPIRSF005993 Occludin, 1 hit
PRINTSiPR01258 OCCLUDIN
PROSITEiView protein in PROSITE
PS51225 MARVEL, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiOCLN_CANLF
<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: Q28269
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: November 1, 1996
Last modified: May 8, 2019
This is version 108 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

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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