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KLK3
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  • KLK3
PROTEIN STRUCTURE
ANTIBODIES
AND
VALIDATION
Protein structures
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).

Read more
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.

Read more
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.

9
Ensembl ENSG00000142515 (version 103.38)
Entrez gene 354
HGNC HGNC:6364
UniProt P07288 (UniProt - Evidence at protein level)
neXtProt NX_P07288
Antibodypedia KLK3 antibodies


PROTEIN STRUCTUREi

The Structure section provides predicted structures from the Alphafold protein structure database and available experimental structures from Protein Data Bank (PDB).

In the Structure drop-down menu all experimental structures from PDB are available for selection and display. The structures are displayed using the NGL Viewer and can be zoomed-in and rotated either manually or by checking the Autorotate box. The Color scheme can be selected to show the residue index, chain name or confidence score (as B-factors and pLDDT score for experimental and predicted structures, respectively). The positions for available antigen sequences in the structure are shown if Antigens is turned to ON, and the Variants slider can be used to show the positions of clinical and population variants.https://github.com/nglviewer/ngl

Read more

Predicted


Description: Structure prediction from Alphafold project. Structure version 2

# Chains: 1      # Clinical variants: 0      # Population variants: 202

Experimental

Description: Crystal structure of human prostate specific antigen complexed with an activating antibody (X-ray)

# Chains: 3      # Clinical variants: 0      # Population variants: 0

Antigens:

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On

Variants:

Off
Clinical
Population

Color scheme:

Confidence
Residue index
Chain name

Autorotate:

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On



PROTEIN BROWSERi

The protein browser displays the antigen location on the target protein(s) and the features of the target protein. The tabs at the top of the protein view section can be used to switch between the different splice variants to which an antigen has been mapped.

At the top of the view, the position of the antigen (identified by the corresponding HPA identifier) is shown as a green bar. A yellow triangle on the bar indicates a <100% sequence identity to the protein target.

Below the antigens, the maximum percent sequence identity of the protein to all other proteins from other human genes is displayed, using a sliding window of 10 aa residues (HsID 10) or 50 aa residues (HsID 50). The region with the lowest possible identity is always selected for antigen design, with a maximum identity of 60% allowed for designing a single-target antigen (read more).

The curve in blue displays the predicted antigenicity i.e. the tendency for different regions of the protein to generate an immune response, with peak regions being predicted to be more antigenic.The curve shows average values based on a sliding window approach using an in-house propensity scale. (read more).

If a signal peptide is predicted by a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius (turquoise) and/or transmembrane regions (orange) are predicted by MDM, these are displayed.

Low complexity regions are shown in yellow and InterPro regions in green. Common (purple) and unique (grey) regions between different splice variants of the gene are also displayed (read more), and at the bottom of the protein view is the protein scale.
KLK3-201
KLK3-202
KLK3-204
KLK3-207
KLK3-210
KLK3-211
KLK3-212
KLK3-214
KLK3-216


PROTEIN INFORMATIONi

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

The ENSP identifier links to the Ensembl website protein summary, while the ENST identifier links to the Ensembl website transcript summary for the selected splice variant. The data in the UniProt column can be expanded to show links to all matching UniProt identifiers for this protein.

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 Gene Ontology terms assigned to this protein are listed if expanding the Gene ontology column. The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide (according to a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius) and the number of predicted transmembrane region(s) (according to MDM) are also reported.
Splice variant UniProt Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
KLK3-201
ENSP00000314151
ENST00000326003
P07288 [Direct mapping]
Prostate-specific antigen
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
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:0002778 [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:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0044267 [cellular protein metabolic process]
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
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:0002778 [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:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0044267 [cellular protein metabolic process]
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
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:0002778 [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:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0044267 [cellular protein metabolic process]
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
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:0002778 [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:0030141 [secretory granule]
GO:0031638 [zymogen activation]
GO:0032991 [protein-containing complex]
GO:0044267 [cellular protein metabolic process]
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
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
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
   SignalP predicted secreted proteins
   Phobius predicted secreted proteins
   SPOCTOPUS 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
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
KLK3-216
ENSP00000483513
ENST00000617027
Q8NCW4 [Direct mapping]
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
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
220 aa
24.3 kDa
Yes 0

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The Human Protein Atlas project is funded
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