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P56856

- CLD18_HUMAN

UniProt

P56856 - CLD18_HUMAN

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Protein
Claudin-18
Gene
CLDN18, UNQ778/PRO1572
Organism
Homo sapiens (Human)
Status
Reviewed - Annotation score: 4 out of 5 - Experimental evidence at protein leveli

Functioni

Plays a major role in tight junction-specific obliteration of the intercellular space, through calcium-independent cell-adhesion activity By similarity.

GO - Molecular functioni

  1. identical protein binding Source: UniProtKB
  2. structural molecule activity Source: InterPro

GO - Biological processi

  1. calcium-independent cell-cell adhesion Source: UniProtKB
  2. cell junction assembly Source: Reactome
  3. cell-cell junction organization Source: Reactome
  4. tight junction assembly Source: Reactome
Complete GO annotation...

Enzyme and pathway databases

ReactomeiREACT_19373. Tight junction interactions.

Names & Taxonomyi

Protein namesi
Recommended name:
Claudin-18
Gene namesi
Name:CLDN18
ORF Names:UNQ778/PRO1572
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
ProteomesiUP000005640: Chromosome 3

Organism-specific databases

HGNCiHGNC:2039. CLDN18.

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Topological domaini1 – 66Cytoplasmic Reviewed prediction
Transmembranei7 – 2721Helical; Reviewed prediction
Add
BLAST
Topological domaini28 – 8053Extracellular Reviewed prediction
Add
BLAST
Transmembranei81 – 10121Helical; Reviewed prediction
Add
BLAST
Topological domaini102 – 12221Cytoplasmic Reviewed prediction
Add
BLAST
Transmembranei123 – 14321Helical; Reviewed prediction
Add
BLAST
Topological domaini144 – 17431Extracellular Reviewed prediction
Add
BLAST
Transmembranei175 – 19521Helical; Reviewed prediction
Add
BLAST
Topological domaini196 – 26166Cytoplasmic Reviewed prediction
Add
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. plasma membrane Source: UniProtKB-SubCell
  3. tight junction Source: UniProtKB
Complete GO annotation...

Keywords - Cellular componenti

Cell junction, Cell membrane, Membrane, Tight junction

Pathology & Biotechi

Organism-specific databases

PharmGKBiPA26565.

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 261261Claudin-18
PRO_0000144779Add
BLAST

Proteomic databases

PaxDbiP56856.
PRIDEiP56856.

PTM databases

PhosphoSiteiP56856.

Expressioni

Tissue specificityi

Concentrated at the cell-cell borders of epithelial cells.

Gene expression databases

ArrayExpressiP56856.
BgeeiP56856.
CleanExiHS_CLDN18.
GenevestigatoriP56856.

Organism-specific databases

HPAiCAB013010.
CAB013243.
HPA018446.

Interactioni

Protein-protein interaction databases

DIPiDIP-48955N.
STRINGi9606.ENSP00000183605.

Structurei

3D structure databases

ProteinModelPortaliP56856.

Family & Domainsi

Sequence similaritiesi

Belongs to the claudin family.

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiNOG46146.
HOGENOMiHOG000220937.
HOVERGENiHBG102991.
KOiK06087.
OMAiHRTANYD.
OrthoDBiEOG76HQ2T.
PhylomeDBiP56856.
TreeFamiTF331936.

Family and domain databases

InterProiIPR006187. Claudin.
IPR003928. Claudin18.
IPR017974. Claudin_CS.
IPR004031. PMP22/EMP/MP20/Claudin.
[Graphical view]
PANTHERiPTHR12002. PTHR12002. 1 hit.
PTHR12002:SF9. PTHR12002:SF9. 1 hit.
PfamiPF00822. PMP22_Claudin. 1 hit.
[Graphical view]
PRINTSiPR01077. CLAUDIN.
PR01448. CLAUDIN18.
PROSITEiPS01346. CLAUDIN. 1 hit.
[Graphical view]

Sequences (2)i

Sequence statusi: Complete.

This entry describes 2 isoformsi produced by alternative splicing. Align

Isoform A1 (identifier: P56856-1) [UniParc]FASTAAdd to Basket

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide

MSTTTCQVVA FLLSILGLAG CIAATGMDMW STQDLYDNPV TSVFQYEGLW    50
RSCVRQSSGF TECRPYFTIL GLPAMLQAVR ALMIVGIVLG AIGLLVSIFA 100
LKCIRIGSME DSAKANMTLT SGIMFIVSGL CAIAGVSVFA NMLVTNFWMS 150
TANMYTGMGG MVQTVQTRYT FGAALFVGWV AGGLTLIGGV MMCIACRGLA 200
PEETNYKAVS YHASGHSVAY KPGGFKASTG FGSNTKNKKI YDGGARTEDE 250
VQSYPSKHDY V 261
Length:261
Mass (Da):27,856
Last modified:May 30, 2000 - v1
Checksum:i4362B590D3C2B387
GO
Isoform A2 (identifier: P56856-2) [UniParc]FASTAAdd to Basket

The sequence of this isoform differs from the canonical sequence as follows:
     1-69: MSTTTCQVVA...FTECRPYFTI → MAVTACQGLG...FTECRGYFTL

Show »
Length:261
Mass (Da):27,720
Checksum:iDA519D1E57FDFCA7
GO

Natural variant

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Natural varianti149 – 1491M → L.
Corresponds to variant rs17204075 [ dbSNP | Ensembl ].
VAR_033775

Alternative sequence

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Alternative sequencei1 – 6969MSTTT…PYFTI → MAVTACQGLGFVVSLIGIAG IIAATCMDQWSTQDLYNNPV TAVFNYQGLWRSCVRESSGF TECRGYFTL in isoform A2.
VSP_001102Add
BLAST

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AF221069 mRNA. Translation: AAF26448.1.
AF349452 mRNA. Translation: AAL15637.1.
AY358479 mRNA. Translation: AAQ88843.1.
CH471052 Genomic DNA. Translation: EAW79092.1.
BC142708 mRNA. Translation: AAI42709.1.
BC146668 mRNA. Translation: AAI46669.1.
CCDSiCCDS3095.1. [P56856-1]
CCDS33862.1. [P56856-2]
RefSeqiNP_001002026.1. NM_001002026.2. [P56856-2]
NP_057453.1. NM_016369.3. [P56856-1]
UniGeneiHs.655324.

Genome annotation databases

EnsembliENST00000183605; ENSP00000183605; ENSG00000066405. [P56856-1]
ENST00000343735; ENSP00000340939; ENSG00000066405. [P56856-2]
GeneIDi51208.
KEGGihsa:51208.
UCSCiuc003ero.1. human. [P56856-2]
uc003erp.1. human. [P56856-1]

Polymorphism databases

DMDMi7387578.

Keywords - Coding sequence diversityi

Alternative splicing, Polymorphism

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
AF221069 mRNA. Translation: AAF26448.1 .
AF349452 mRNA. Translation: AAL15637.1 .
AY358479 mRNA. Translation: AAQ88843.1 .
CH471052 Genomic DNA. Translation: EAW79092.1 .
BC142708 mRNA. Translation: AAI42709.1 .
BC146668 mRNA. Translation: AAI46669.1 .
CCDSi CCDS3095.1. [P56856-1 ]
CCDS33862.1. [P56856-2 ]
RefSeqi NP_001002026.1. NM_001002026.2. [P56856-2 ]
NP_057453.1. NM_016369.3. [P56856-1 ]
UniGenei Hs.655324.

3D structure databases

ProteinModelPortali P56856.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

DIPi DIP-48955N.
STRINGi 9606.ENSP00000183605.

PTM databases

PhosphoSitei P56856.

Polymorphism databases

DMDMi 7387578.

Proteomic databases

PaxDbi P56856.
PRIDEi P56856.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

Ensembli ENST00000183605 ; ENSP00000183605 ; ENSG00000066405 . [P56856-1 ]
ENST00000343735 ; ENSP00000340939 ; ENSG00000066405 . [P56856-2 ]
GeneIDi 51208.
KEGGi hsa:51208.
UCSCi uc003ero.1. human. [P56856-2 ]
uc003erp.1. human. [P56856-1 ]

Organism-specific databases

CTDi 51208.
GeneCardsi GC03P137717.
H-InvDB HIX0003711.
HGNCi HGNC:2039. CLDN18.
HPAi CAB013010.
CAB013243.
HPA018446.
MIMi 609210. gene.
neXtProti NX_P56856.
PharmGKBi PA26565.
GenAtlasi Search...

Phylogenomic databases

eggNOGi NOG46146.
HOGENOMi HOG000220937.
HOVERGENi HBG102991.
KOi K06087.
OMAi HRTANYD.
OrthoDBi EOG76HQ2T.
PhylomeDBi P56856.
TreeFami TF331936.

Enzyme and pathway databases

Reactomei REACT_19373. Tight junction interactions.

Miscellaneous databases

GeneWikii CLDN18.
GenomeRNAii 51208.
NextBioi 54274.
PROi P56856.
SOURCEi Search...

Gene expression databases

ArrayExpressi P56856.
Bgeei P56856.
CleanExi HS_CLDN18.
Genevestigatori P56856.

Family and domain databases

InterProi IPR006187. Claudin.
IPR003928. Claudin18.
IPR017974. Claudin_CS.
IPR004031. PMP22/EMP/MP20/Claudin.
[Graphical view ]
PANTHERi PTHR12002. PTHR12002. 1 hit.
PTHR12002:SF9. PTHR12002:SF9. 1 hit.
Pfami PF00822. PMP22_Claudin. 1 hit.
[Graphical view ]
PRINTSi PR01077. CLAUDIN.
PR01448. CLAUDIN18.
PROSITEi PS01346. CLAUDIN. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

« Hide 'large scale' publications
  1. "Claudin-18, a novel downstream target gene for the T/EBP/NKX2.1 homeodomain transcription factor, encodes lung- and stomach-specific isoforms through alternative splicing."
    Niimi T., Nagashima K., Ward J.M., Minoo P., Zimonjic D.B., Popescu N.C., Kimura S.
    Mol. Cell. Biol. 21:7380-7390(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA], ALTERNATIVE SPLICING.
  2. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM A1).
  3. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
  4. "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
    The MGC Project Team
    Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM A1).

Entry informationi

Entry nameiCLD18_HUMAN
AccessioniPrimary (citable) accession number: P56856
Secondary accession number(s): A5PL21, Q96PH4
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 30, 2000
Last sequence update: May 30, 2000
Last modified: September 3, 2014
This is version 118 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Human chromosome 3
    Human chromosome 3: entries, gene names and cross-references to MIM
  2. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  3. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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