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TPCN1
HPA
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  • TPCN1
PROTEIN SUMMARY GENE INFORMATION RNA DATA ANTIBODY DATA
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

TPCN1
Synonyms FLJ20612, KIAA1169, TPC1
Gene descriptioni

Full gene name according to HGNC.

Two pore segment channel 1
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Transporters
Voltage-gated ion channels
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.

  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Membrane, Intracellular
Protein evidence Evidence at protein level (all genes)
GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Chromosome 12
Cytoband q24.13
Chromosome location (bp) 113221050 - 113298585
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

15
Ensembl ENSG00000186815 (version 109)
Entrez gene 53373
HGNC HGNC:18182
UniProt Q9ULQ1 (UniProt - Evidence at protein level)
neXtProt NX_Q9ULQ1
GeneCards TPCN1
Antibodypedia TPCN1 antibodies


PROTEIN FUNCTION
Protein function (UniProt)i

Useful information about the protein provided by UniProt.

Intracellular channel initially characterized as a non-selective Ca(2+)-permeable channel activated by NAADP (nicotinic acid adenine dinucleotide phosphate), it is also a voltage-gated highly-selective Na(+) channel activated directly by PI(3,5)P2 (phosphatidylinositol 3,5-bisphosphate) that senses pH changes and confers electrical excitability to organelles 1, 2, 3, 4. Localizes to the early and recycling endosomes membranes where it plays a role in the uptake and processing of proteins and regulates organellar membrane excitability, membrane trafficking and pH homeostasis (Probable) 5. Ion selectivity is not fixed but rather agonist-dependent and under defined ionic conditions, can be readily activated by both NAADP and PI(3,5)P2 (Probable). Required for mTOR-dependent nutrient sensing (Probable) 6.... show less
Molecular function (UniProt)i

Keywords assigned by UniProt to proteins due to their particular molecular function.

Calcium channel, Ion channel, Voltage-gated channel
Biological process (UniProt)i

Keywords assigned by UniProt to proteins because they are involved in a particular biological process.

Calcium transport, Ion transport, Transport
Ligand (UniProt)i

Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.

Calcium
Gene summary (Entrez)i

Useful information about the gene from Entrez

Voltage-gated Ca(2+) and Na+ channels have 4 homologous domains, each containing 6 transmembrane segments, S1 to S6. TPCN1 is similar to these channels, but it has only 2 domains containing S1 to S6 (Ishibashi et al., 2000).[supplied by OMIM, Mar 2008]... show less
PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Splice variant SwissProt TrEMBL Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
TPCN1-201
ENSP00000335300
ENST00000335509
Q9ULQ1
[Direct mapping] Two pore channel protein 1
Show all
Transporters
   Transporter channels and pores
Voltage-gated ion channels
   CatSper and Two-Pore Channels
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   >9TM proteins predicted by MDM
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005216 [ion channel activity]
GO:0005244 [voltage-gated ion channel activity]
GO:0005248 [voltage-gated sodium channel activity]
GO:0005262 [calcium channel activity]
GO:0005515 [protein binding]
GO:0005764 [lysosome]
GO:0005765 [lysosomal membrane]
GO:0005768 [endosome]
GO:0006811 [ion transport]
GO:0006816 [calcium ion transport]
GO:0010008 [endosome membrane]
GO:0010508 [positive regulation of autophagy]
GO:0015280 [ligand-gated sodium channel activity]
GO:0016020 [membrane]
GO:0019905 [syntaxin binding]
GO:0022832 [voltage-gated channel activity]
GO:0031901 [early endosome membrane]
GO:0034220 [ion transmembrane transport]
GO:0034765 [regulation of ion transmembrane transport]
GO:0035725 [sodium ion transmembrane transport]
GO:0036019 [endolysosome]
GO:0042802 [identical protein binding]
GO:0042803 [protein homodimerization activity]
GO:0051209 [release of sequestered calcium ion into cytosol]
GO:0055038 [recycling endosome membrane]
GO:0055085 [transmembrane transport]
GO:0070588 [calcium ion transmembrane transport]
GO:0072345 [NAADP-sensitive calcium-release channel activity]
GO:0075509 [endocytosis involved in viral entry into host cell]
GO:0080025 [phosphatidylinositol-3,5-bisphosphate binding]
GO:0097682 [intracellular phosphatidylinositol-3,5-bisphosphate-sensitive cation channel activity]
Show all
816 aa
94.1 kDa
No >9
TPCN1-202
ENSP00000376350
ENST00000392569
B7Z3R2
[Direct mapping] Two pore channel protein 1; cDNA FLJ54008, highly similar to Homo sapiens two pore segment channel 1 (TPCN1), mRNA
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   >9TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005216 [ion channel activity]
GO:0005765 [lysosomal membrane]
GO:0006811 [ion transport]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0034220 [ion transmembrane transport]
GO:0055085 [transmembrane transport]
Show all
748 aa
87.3 kDa
No >9
TPCN1-204
ENSP00000438125
ENST00000541517
Q9ULQ1
[Direct mapping] Two pore channel protein 1
Show all
Transporters
   Transporter channels and pores
Voltage-gated ion channels
   CatSper and Two-Pore Channels
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   >9TM proteins predicted by MDM
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005216 [ion channel activity]
GO:0005244 [voltage-gated ion channel activity]
GO:0005248 [voltage-gated sodium channel activity]
GO:0005262 [calcium channel activity]
GO:0005515 [protein binding]
GO:0005764 [lysosome]
GO:0005765 [lysosomal membrane]
GO:0005768 [endosome]
GO:0006811 [ion transport]
GO:0006816 [calcium ion transport]
GO:0010008 [endosome membrane]
GO:0010508 [positive regulation of autophagy]
GO:0015280 [ligand-gated sodium channel activity]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0031901 [early endosome membrane]
GO:0034220 [ion transmembrane transport]
GO:0034765 [regulation of ion transmembrane transport]
GO:0036019 [endolysosome]
GO:0042802 [identical protein binding]
GO:0051209 [release of sequestered calcium ion into cytosol]
GO:0055038 [recycling endosome membrane]
GO:0055085 [transmembrane transport]
GO:0070588 [calcium ion transmembrane transport]
GO:0072345 [NAADP-sensitive calcium-release channel activity]
GO:0075509 [endocytosis involved in viral entry into host cell]
GO:0097682 [intracellular phosphatidylinositol-3,5-bisphosphate-sensitive cation channel activity]
Show all
888 aa
101.8 kDa
No >9
TPCN1-206
ENSP00000449564
ENST00000546781
H0YIK4
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005216 [ion channel activity]
GO:0005765 [lysosomal membrane]
GO:0006811 [ion transport]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0034220 [ion transmembrane transport]
GO:0055085 [transmembrane transport]
Show all
204 aa
23.8 kDa
No 2
TPCN1-209
ENSP00000449560
ENST00000547275
F8VVY9
[Direct mapping] Two pore channel protein 1
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0005765 [lysosomal membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
147 aa
15.7 kDa
No 0
TPCN1-211
ENSP00000448561
ENST00000548465
F8VR74
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   3TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005765 [lysosomal membrane]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
145 aa
16.7 kDa
No 3
TPCN1-212
ENSP00000448704
ENST00000549279
F8W0K7
[Direct mapping] Two pore channel protein 1
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
99 aa
10.6 kDa
No 0
TPCN1-214
ENSP00000448083
ENST00000550785
Q9ULQ1
[Direct mapping] Two pore channel protein 1
Show all
Transporters
   Transporter channels and pores
Voltage-gated ion channels
   CatSper and Two-Pore Channels
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   >9TM proteins predicted by MDM
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005216 [ion channel activity]
GO:0005244 [voltage-gated ion channel activity]
GO:0005248 [voltage-gated sodium channel activity]
GO:0005262 [calcium channel activity]
GO:0005515 [protein binding]
GO:0005764 [lysosome]
GO:0005765 [lysosomal membrane]
GO:0005768 [endosome]
GO:0006811 [ion transport]
GO:0006816 [calcium ion transport]
GO:0010008 [endosome membrane]
GO:0010508 [positive regulation of autophagy]
GO:0015280 [ligand-gated sodium channel activity]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0031901 [early endosome membrane]
GO:0034220 [ion transmembrane transport]
GO:0034765 [regulation of ion transmembrane transport]
GO:0036019 [endolysosome]
GO:0042802 [identical protein binding]
GO:0051209 [release of sequestered calcium ion into cytosol]
GO:0055038 [recycling endosome membrane]
GO:0055085 [transmembrane transport]
GO:0070588 [calcium ion transmembrane transport]
GO:0072345 [NAADP-sensitive calcium-release channel activity]
GO:0075509 [endocytosis involved in viral entry into host cell]
GO:0097682 [intracellular phosphatidylinositol-3,5-bisphosphate-sensitive cation channel activity]
Show all
888 aa
101.8 kDa
No >9
TPCN1-215
ENSP00000447073
ENST00000550873
F8W1G4
[Direct mapping] Two pore channel protein 1
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0005765 [lysosomal membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
85 aa
8.8 kDa
No 0
TPCN1-216
ENSP00000447263
ENST00000551096
F8VZZ6
[Direct mapping] Two pore channel protein 1
Show all
   SPOCTOPUS predicted secreted proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
124 aa
12.9 kDa
No 0
TPCN1-217
ENSP00000447181
ENST00000551099
F8W0K7
[Direct mapping] Two pore channel protein 1
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
99 aa
10.6 kDa
No 0
TPCN1-220
ENSP00000446767
ENST00000552542
F8W1L6
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005765 [lysosomal membrane]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
120 aa
13.7 kDa
No 2
TPCN1-221
ENSP00000447806
ENST00000552642
F8VS97
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005765 [lysosomal membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
126 aa
13.7 kDa
No 1
TPCN1-222
ENSP00000449944
ENST00000552897
F8VV93
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005765 [lysosomal membrane]
GO:0016020 [membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
107 aa
12.3 kDa
No 2
TPCN1-223
ENSP00000447569
ENST00000552985
F8W0P9
[Direct mapping] Two pore channel protein 1
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0005765 [lysosomal membrane]
GO:0022832 [voltage-gated channel activity]
GO:0055085 [transmembrane transport]
Show all
215 aa
22.9 kDa
No 1

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