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KLK3
HPA
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  • KLK3
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.

KLK3
Synonyms APS, PSA
Gene descriptioni

Full gene name according to HGNC.

Kallikrein related peptidase 3
Protein classi

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

Cancer-related genes
Enzymes
FDA approved drug targets
Plasma proteins
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.

Secreted
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 19
Cytoband q13.33
Chromosome location (bp) 50854915 - 50860764
Number of transcriptsi

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

8
Ensembl ENSG00000142515 (version 109)
Entrez gene 354
HGNC HGNC:6364
UniProt P07288 (UniProt - Evidence at protein level)
neXtProt NX_P07288
GeneCards KLK3
Antibodypedia KLK3 antibodies


PROTEIN FUNCTION
Protein function (UniProt)i

Useful information about the protein provided by UniProt.

Hydrolyzes semenogelin-1 thus leading to the liquefaction of the seminal coagulum.... show less
Molecular function (UniProt)i

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

Hydrolase, Protease, Serine protease
Gene summary (Entrez)i

Useful information about the gene from Entrez

Kallikreins are a subgroup of serine proteases having diverse physiological functions. Growing evidence suggests that many kallikreins are implicated in carcinogenesis and some have potential as novel cancer and other disease biomarkers. The gene is one of the fifteen kallikrein subfamily members located in a cluster on chromosome 19. It encodes a single-chain glycoprotein, a protease which is synthesized in the epithelial cells of the prostate gland, and is present in seminal plasma. It is thought to function normally in the liquefaction of seminal coagulum, presumably by hydrolysis of the high molecular mass seminal vesicle protein. The serum level of this protein, called PSA in the clinical setting, is useful in the diagnosis and monitoring of prostatic carcinoma. Alternate splicing of this gene generates several transcript variants encoding different isoforms. [provided by RefSeq, Dec 2019]... 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)
KLK3-201
ENSP00000314151
ENST00000326003
P07288
[Direct mapping] Prostate-specific antigen
Show all
Q546G3
[Target identity:100%; Query identity:100%] Kallikrein 3, (Prostate specific antigen), isoform CRA_m; Kallikrein A2; Prostate specific antigen; cDNA, FLJ93384, Homo sapiens kallikrein 3, (prostate specific antigen) (KLK3),transcript variant 1, mRNA
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Plasma proteins
Cancer-related genes
   Candidate cancer biomarkers
FDA approved drug targets
   Small molecule drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002803 [positive regulation of antibacterial peptide production]
GO:0003073 [regulation of systemic arterial blood pressure]
GO:0004175 [endopeptidase activity]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005634 [nucleus]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016525 [negative regulation of angiogenesis]
GO:0016787 [hydrolase activity]
GO:0016811 [hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides]
GO:0019538 [protein metabolic process]
GO:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0070062 [extracellular exosome]
Show all
261 aa
28.7 kDa
Yes 0
KLK3-202
ENSP00000353829
ENST00000360617
P07288
[Direct mapping] Prostate-specific antigen
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Plasma proteins
Cancer-related genes
   Candidate cancer biomarkers
FDA approved drug targets
   Small molecule drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002803 [positive regulation of antibacterial peptide production]
GO:0003073 [regulation of systemic arterial blood pressure]
GO:0004175 [endopeptidase activity]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005634 [nucleus]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016525 [negative regulation of angiogenesis]
GO:0016787 [hydrolase activity]
GO:0016811 [hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides]
GO:0019538 [protein metabolic process]
GO:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0070062 [extracellular exosome]
Show all
238 aa
26.3 kDa
Yes 0
KLK3-204
ENSP00000472907
ENST00000593997
P07288
[Direct mapping] Prostate-specific antigen
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Plasma proteins
Cancer-related genes
   Candidate cancer biomarkers
FDA approved drug targets
   Small molecule drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002803 [positive regulation of antibacterial peptide production]
GO:0003073 [regulation of systemic arterial blood pressure]
GO:0004175 [endopeptidase activity]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005634 [nucleus]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016525 [negative regulation of angiogenesis]
GO:0016787 [hydrolase activity]
GO:0016811 [hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides]
GO:0019538 [protein metabolic process]
GO:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0070062 [extracellular exosome]
Show all
227 aa
25.1 kDa
Yes 0
KLK3-207
ENSP00000471155
ENST00000595952
P07288
[Direct mapping] Prostate-specific antigen
Show all
Enzymes
   ENZYME proteins
   Hydrolases
   Peptidases
   Serine-type peptidases
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Plasma proteins
Cancer-related genes
   Candidate cancer biomarkers
FDA approved drug targets
   Small molecule drugs
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0002803 [positive regulation of antibacterial peptide production]
GO:0003073 [regulation of systemic arterial blood pressure]
GO:0004175 [endopeptidase activity]
GO:0004252 [serine-type endopeptidase activity]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005634 [nucleus]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016525 [negative regulation of angiogenesis]
GO:0016787 [hydrolase activity]
GO:0016811 [hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides]
GO:0019538 [protein metabolic process]
GO:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0070062 [extracellular exosome]
Show all
218 aa
23.7 kDa
Yes 0
KLK3-210
ENSP00000470523
ENST00000597286
M0QZF9
[Direct mapping] Prostate-specific antigen
Show all
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   DeepSig predicted secreted proteins
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
Show all
172 aa
19.1 kDa
Yes 0
KLK3-211
ENSP00000472411
ENST00000597483
M0R294
[Direct mapping] Kallikrein 3, (Prostate specific antigen), isoform CRA_d; Prostate-specific antigen
Show all
   THUMBUP predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0006508 [proteolysis]
Show all
195 aa
21.3 kDa
Yes 0
KLK3-212
ENSP00000471827
ENST00000598145
M0R1F0
[Direct mapping] Prostate-specific antigen
Show all
   SPOCTOPUS predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
Show all
262 aa
28.6 kDa
Yes 0
KLK3-214
ENSP00000472213
ENST00000601503
M0R1Z7
[Direct mapping] Prostate-specific antigen
Show all
   SPOCTOPUS predicted membrane proteins
Predicted secreted proteins
   Secreted proteins predicted by MDSEC
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS predicted secreted proteins
   DeepTMHMM predicted secreted proteins
   DeepSig predicted secreted proteins
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0004252 [serine-type endopeptidase activity]
GO:0006508 [proteolysis]
GO:0008233 [peptidase activity]
GO:0008236 [serine-type peptidase activity]
GO:0016787 [hydrolase activity]
Show all
172 aa
19.1 kDa
Yes 0

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