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Information on EC 3.4.21.B43 - kallikrein 12 and Organism(s) Homo sapiens and UniProt Accession Q9UKR0

for references in articles please use BRENDA:EC3.4.21.B43
preliminary BRENDA-supplied EC number
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EC Tree
     3 Hydrolases
         3.4 Acting on peptide bonds (peptidases)
             3.4.21 Serine endopeptidases
                3.4.21.B43 kallikrein 12
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Select one or more organisms in this record: ?
This record set is specific for:
Homo sapiens
UNIPROT: Q9UKR0
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Word Map
The taxonomic range for the selected organisms is: Homo sapiens
The enzyme appears in selected viruses and cellular organisms
Reaction Schemes
proteolytic cleavage of polypeptides
Synonyms
klk12, kallikrein 12, kallikrein-related peptidase 12, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
kallikrein-related peptidase 12
-
hK12
-
-
kallikrein 12
-
-
kallikrein-related peptidase 12
-
-
S01.020
-
-
-
-
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
proteolytic cleavage of polypeptides
show the reaction diagram
enzyme is a serine protease
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
hydrolysis of peptide bond
CAS REGISTRY NUMBER
COMMENTARY hide
342900-25-8
-
9001-01-8
-
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
Abz-GMQWLKTQGN-(3-NO2-Tyr) + H2O
?
show the reaction diagram
-
-
-
?
Abz-ISLMKYRPPGF-(3-NO2)-Tyr + H2O
?
show the reaction diagram
very low activity
-
-
?
Abz-SPFRSSR-(3-NO2)-Tyr + H2O
?
show the reaction diagram
low activity
-
-
?
Boc-VPR-7-amido-4-methylcoumarin + H2O
Boc-VPR + 7-amino-4-methylcoumarin
show the reaction diagram
-
-
-
?
CCN1 protein + H2O
?
show the reaction diagram
i.e. (cyr61,ctgf, nov), the main cleavage site is localized in the hinge region between the first and second half of the recombinant protein at Lys88-Gly89, Lys208-Arg209, Arg218-Ile219, Lys291-Lys292, and Lys345-Asn346
-
-
?
CCN2 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN3 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN4 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN5 protein + H2O
?
show the reaction diagram
cleavage site is at Arg215-Val216
-
-
?
CCN6 protein + H2O
?
show the reaction diagram
-
-
-
?
Fibronectin + H2O
?
show the reaction diagram
high molecular weight kininogen + H2O
?
show the reaction diagram
proteolysis pattern, overview. Release of bradykinin, a fragment containing the C-terminal end of kinins. The kininogenase activity of the enzyme is poor due to the resistance of hydrolysis of the K-R bond on the N-terminal side of the bradykinin sequence in the kininogen
-
-
?
influenza hemagglutinin precursor + H2O
mature influenza hemagglutinin + ?
show the reaction diagram
platelet-derived growth factor B precursor + H2O
mature platelet-derived growth factor B + ?
show the reaction diagram
polypeptide + H2O
peptides
show the reaction diagram
tenascin + H2O
?
show the reaction diagram
alpha2-antiplasmin + H2O
?
show the reaction diagram
-
-
-
-
?
Antithrombin III + H2O
?
show the reaction diagram
-
-
-
-
?
C1 inhibitor + H2O
?
show the reaction diagram
-
-
-
-
?
D-Val-Leu-Lys-thiobenzyl ester + H2O
D-Val-Leu-Lys + thiobenzyl alcohol
show the reaction diagram
-
100% activity
-
-
?
protein C inhibitor + H2O
?
show the reaction diagram
-
-
-
-
?
tert-butyloxycarbonyl-DPR-7-amido-4-methylcoumarin + H2O
tert-butyloxycarbonyl-DPR + 7-amino-4-methylcoumarin
show the reaction diagram
-
55% activity compared to D-Val-Leu-Lys-thiobenzyl ester
-
-
?
tert-butyloxycarbonyl-FSR-7-amido-4-methylcoumarin + H2O
tert-butyloxycarbonyl-FSR + 7-amino-4-methylcoumarin
show the reaction diagram
-
13% activity compared to D-Val-Leu-Lys-thiobenzyl ester
-
-
?
tert-butyloxycarbonyl-QAR-7-amido-4-methylcoumarin + H2O
tert-butyloxycarbonyl-QAR + 7-amino-4-methylcoumarin
show the reaction diagram
-
98% activity compared to D-Val-Leu-Lys-thiobenzyl ester
-
-
?
tert-butyloxycarbonyl-VPR-7-amido-4-methylcoumarin + H2O
tert-butyloxycarbonyl-VPR + 7-amino-4-methylcoumarin
show the reaction diagram
-
85% activity compared to D-Val-Leu-Lys-thiobenzyl ester
-
-
?
additional information
?
-
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
CCN1 protein + H2O
?
show the reaction diagram
i.e. (cyr61,ctgf, nov), the main cleavage site is localized in the hinge region between the first and second half of the recombinant protein at Lys88-Gly89, Lys208-Arg209, Arg218-Ile219, Lys291-Lys292, and Lys345-Asn346
-
-
?
CCN2 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN3 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN4 protein + H2O
?
show the reaction diagram
-
-
-
?
CCN5 protein + H2O
?
show the reaction diagram
cleavage site is at Arg215-Val216
-
-
?
CCN6 protein + H2O
?
show the reaction diagram
-
-
-
?
Fibronectin + H2O
?
show the reaction diagram
the enzyme cleaves the human extracellular matrix proteins fibronectin and tenascin, both of which are involved in the regulation of endothelial cell adhesion and migration. KLK12-mediated fibronectin proteolysis antagonizes fibronectin polymerization and fibronectin fibril formation by endothelial cells, leading to an increase in cell migration
-
-
?
influenza hemagglutinin precursor + H2O
mature influenza hemagglutinin + ?
show the reaction diagram
the enzyme shows a preference for the H1 and H2 subtypes, the amino acids neighboring the arginine cleavage site affect cleavage efficiency
-
-
?
platelet-derived growth factor B precursor + H2O
mature platelet-derived growth factor B + ?
show the reaction diagram
membrane bound zymogen
soluble mature paracrine factor
-
?
polypeptide + H2O
peptides
show the reaction diagram
involved in posttranslational processing of polypeptide precursors
-
?
tenascin + H2O
?
show the reaction diagram
the enzyme cleaves the human extracellular matrix proteins fibronectin and tenascin, both of which are involved in the regulation of endothelial cell adhesion and migration
-
-
?
additional information
?
-
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Ca2+
-
compared to the absence of calcium, a 2fold, 2.5fold, and 3fold increase in activity could be obtained by adding Ca2+ concentration of 0.1, 1, and 10 mM, respectively, however, it is not increased further by higher concentrations of Ca2+
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
3,4-dichloroisocoumarin
-
strong inhibitor at 0.25 mM
alpha1-antitrypsin
-
less than 50% inhibition at 5fold molecular inhibitor excess
-
alpha2-antiplasmin
-
-
-
antithrombin-III
-
less than 50% inhibition at 5fold molecular inhibitor excess
-
Aprotinin
-
weak inhibition at 0.02 mM
benzamidine
-
strong inhibitor at 5 mM
C1 inhibitor
-
-
-
NaCl
-
activity is reduced by approximately 30% in the presence of 0.8 M NaCl
Protein C inhibitor
-
-
-
Zn2+
-
10 mM Zn2+ is sufficient to inhibit 50% of the KLK12 enzyme activity, more than 95% suppression can be achieved by 0.2 mM Zn2+
additional information
-
ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
additional information
the activity of KLK12 can be tightly regulated by autodegradation, by interaction with zinc ions, and by covalent complex formation with alpha2-antiplasmin
-
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.012
Abz-GMQWLKTQGN-(3-NO2-Tyr)
37°C, pH 7.5
0.0294
D-Val-Leu-Lys-thiobenzyl ester
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
0.35
tert-butyloxycarbonyl-DPR-7-amido-4-methylcoumarin
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
0.565
tert-butyloxycarbonyl-FSR-7-amido-4-methylcoumarin
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
0.0686
tert-butyloxycarbonyl-QAR-7-amido-4-methylcoumarin
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
0.2
tert-butyloxycarbonyl-VPR-7-amido-4-methylcoumarin
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
additional information
additional information
-
TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
2.45
Abz-GMQWLKTQGN-(3-NO2-Tyr)
37°C, pH 7.5
12.42
D-Val-Leu-Lys-thiobenzyl ester
-
in 0.1 M Tris, 10 mM CaCl2, 0.15 M NaCl, pH 8.0, at 37°C
0.017 - 32.65
tert-butyloxycarbonyl-DPR-7-amido-4-methylcoumarin
0.052 - 10.06
tert-butyloxycarbonyl-FSR-7-amido-4-methylcoumarin
0.97 - 17.26
tert-butyloxycarbonyl-QAR-7-amido-4-methylcoumarin
8.1 - 25.81
tert-butyloxycarbonyl-VPR-7-amido-4-methylcoumarin
IC50 VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.011
3,4-dichloroisocoumarin
Homo sapiens
-
-
0.28
benzamidine
Homo sapiens
-
-
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
7.5 - 8
-
-
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
low content
Manually annotated by BRENDA team
discriminative value of KLK12sv1/2 and KLK12sv3 splive varients between benign and malignant breast tumors
Manually annotated by BRENDA team
very low content
Manually annotated by BRENDA team
additional information
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
the enzyme is secreted
-
Manually annotated by BRENDA team
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
metabolism
PDGF-B is probably one of the molecules linking the interaction between enzyme-induced endothelial cells and fibroblasts. Expression of both KLK12 and PDGFB genes is regulated by hypoxia in the lung tumor microenvironment
physiological function
additional information
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
KLK12_HUMAN
248
0
26734
Swiss-Prot
-
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
24500
28000
SDS-PAGE, tagged enzyme
38000
-
SDS-PAGE
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
?
x * 24500, calculated from amino acid sequence
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
proteolytic modification
activation of the proform of the enzyme, pro-KLK12
pH STABILITY
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
5 - 7
-
when the pH is decreased to less than 5.0, KLK12 enzyme activity becomes undetectable, KLK12 activity is very sensitive to pH changes in the range 6.5-7.0 (within this range, a decrease of 0.5 pH units results in a more than 60% reduction in activity)
678534
ORGANIC SOLVENT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Brij-35
-
adding 10-20% glycerol and 0.05% Brij-35 to the KLK12 autoactivation mixture can slow down activation
Glycerol
-
adding 10-20% glycerol and 0.05% Brij-35 to the KLK12 autoactivation mixture can slow down activation
STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
37°C, 12.5 mM MES, 75 mM NaCl, after 16 h, 24 h, 48 h, and 72 h only 50%, 35%, 20%, and 10% of the initial activity is detected
-
37°C, in the presence of 10-20% glycerol and 0.05% Brij-35, 72 h, 10% loss of activity
-
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
Ni-NTA agarose column chromatography and reversed-phase high performance liquid chromatography
affinity chromatography and gel filtration
-
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
expressed in Escherichia coli strain BL21(DE3)
gene KLK12, formerly KLK5, DNA sequence determination and analysis, chromosome mapping to 19q13.3-13.4, splice variants identification, genomic organization
molecular cloning of four novel splice variants of the human KLK12 gene, discovered by combining 3' rapid amplification of cDNA ends (3' RACE), NGS technology, advanced bioinformatic analysis, and Sanger sequencing
the gene is located on chromosome 19q13.4, splice variants KLK12sv3 and KLK12sv1/KLK12sv2 in breast cancer cells by quantitative real-time PCR as well as semi-quantitative PCR expression analysis
expressed in NS0 myeloma cell line
-
EXPRESSION
ORGANISM
UNIPROT
LITERATURE
Expression of both KLK12 and PDGFB genes is regulated by hypoxia in the lung tumor microenvironment
KLK12 expression is increased in lung tumor
APPLICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
diagnostics
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Boeckmann, B.; Bairoch, A.; Apweiler, R.; Blatter, M.C.; Estreicher, A.; Gasteiger, E.; Martin M.J.; Michoud, K.; O'Donovan, C.; Phan, I.; Pilbout, S.; Schneider, M.
The SWISS-PROT protein knowledgebase and its supplement TrEMBL
Nucleic Acids Res.
31
365-370
2003
Homo sapiens (Q9UKR0)
Manually annotated by BRENDA team
Yousef, G.M.; Magklara, A.; Diamandis, E.P.
KLK12 is a novel serine protease and a new member of the human kallikrein gene family-differential expression in breast cancer
Genomics
69
331-341
2000
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Shinmura, K.; Tao, H.; Yamada, H.; Kataoka, H.; Sanjar, R.; Wang, J.; Yoshimura, K.; Sugimura, H.
Splice-site genetic polymorphism of the human kallikrein 12 (KLK12) gene correlates with no substantial expression of KLK12 protein having serine protease activity
Hum. Mutat.
24
273-274
2004
Homo sapiens
Manually annotated by BRENDA team
Luo, L.; Jiang, W.
Inhibition profiles of human tissue kallikreins by serine protease inhibitors
Biol. Chem.
387
813-816
2006
Homo sapiens
Manually annotated by BRENDA team
Memari, N.; Jiang, W.; Diamandis, E.P.; Luo, L.Y.
Enzymatic properties of human kallikrein-related peptidase 12 (KLK12)
Biol. Chem.
388
427-435
2007
Homo sapiens
Manually annotated by BRENDA team
Shaw, J.L.; Diamandis, E.P.
Distribution of 15 human kallikreins in tissues and biological fluids
Clin. Chem.
53
1423-1432
2007
Homo sapiens (Q9UKR0)
Manually annotated by BRENDA team
Memari, N.; Diamandis, E.P.; Earle, T.; Campbell, A.; Van Dekken, H.; Van der Kwast, T.H.
Human kallikrein-related peptidase 12: antibody generation and immunohistochemical localization in prostatic tissues
Prostate
67
1465-1474
2007
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Guillon-Munos, A.; Oikonomopoulou, K.; Michel, N.; Smith, C.R.; Petit-Courty, A.; Canepa, S.; Reverdiau, P.; Heuze-Vourch, N.; Diamandis, E.P.; Courty, Y.
Kallikrein-related peptidase 12 hydrolyzes matricellular proteins of the CCN family and modifies interactions of CCN1 and CCN5 with growth factors
J. Biol. Chem.
286
25505-25518
2011
Homo sapiens (Q9UKR0)
Manually annotated by BRENDA team
Kryza, T.; Lalmanach, G.; Lavergne, M.; Lecaille, F.; Reverdiau, P.; Courty, Y.; Heuze-Vourch, N.
Pro-angiogenic effect of human kallikrein-related peptidase 12 (KLK12) in lung endothelial cells does not depend on kinin-mediated activation of B2 receptor
Biol. Chem.
394
385-391
2013
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Kryza, T.; Achard, C.; Parent, C.; Marchand-Adam, S.; Guillon-Munos, A.; Iochmann, S.; Korkmaz, B.; Respaud, R.; Courty, Y.; Heuze-Vourch, N.
Angiogenesis stimulated by human kallikrein-related peptidase 12 acting via a platelet-derived growth factor B-dependent paracrine pathway
FASEB J.
28
740-751
2014
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Hamilton, B.S.; Whittaker, G.R.
Cleavage activation of human-adapted influenza virus subtypes by kallikrein-related peptidases 5 and 12
J. Biol. Chem.
288
17399-17407
2013
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Talieri, M.; Devetzi, M.; Scorilas, A.; Pappa, E.; Tsapralis, N.; Missitzis, I.; Ardavanis, A.
Human kallikrein-related peptidase 12 (KLK12) splice variants expression in breast cancer and their clinical impact
Tumour Biol.
33
1075-1084
2012
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Adamopoulos, P.G.; Kontos, C.K.; Scorilas, A.
Novel splice variants of the human kallikrein-related peptidases 11 (KLK11) and 12 (KLK12), unraveled by next-generation sequencing technology
Biol. Chem.
399
1065-1071
2018
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Papachristopoulou, G.; Tsapralis, N.; Michaelidou, K.; Ardavanis-Loukeris, G.; Griniatsos, I.; Scorilas, A.; Talieri, M.
Human kallikrein-related peptidase 12 (KLK12) splice variants discriminate benign from cancerous breast tumors
Clin. Biochem.
58
78-85
2018
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team
Kryza, T.; Parent, C.; Pardessus, J.; Petit, A.; Burlaud-Gaillard, J.; Reverdiau, P.; Iochmann, S.; Labas, V.; Courty, Y.; Heuze-Vourch, N.
Human kallikrein-related peptidase 12 stimulates endothelial cell migration by remodeling the fibronectin matrix
Sci. Rep.
8
6331
2018
Homo sapiens (Q9UKR0), Homo sapiens
Manually annotated by BRENDA team