KLK6: Difference between revisions

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{{Infobox protein
== KLK6 (Kallikrein-Related Peptidase 6) ==
| name = Kallikrein-related peptidase 2
| symbol = KLK2
| image =
| caption =
| HGNCid = 6366
| OMIM = 147960
| RefSeq = NM_005551
| UniProt = P20151
| ECnumber = 3.4.21.35
}}


'''Kallikrein-related peptidase 2''' (KLK2) is a serine protease enzyme encoded by the ''KLK2'' gene in humans. It is part of the [[kallikrein]] family of enzymes, which are involved in various physiological processes, including [[blood pressure regulation]], [[inflammation]], and [[cancer]] progression.
[[File:Neurosin_Degradation_Mechanism.jpg|thumb|right|Diagram of KLK6 degradation mechanism]]


==Structure==
'''KLK6''', also known as '''kallikrein-related peptidase 6''', is a serine protease enzyme encoded by the ''KLK6'' gene in humans. It is part of the [[kallikrein]] family, which consists of 15 serine proteases with diverse physiological functions. KLK6 is predominantly expressed in the [[central nervous system]], but it is also found in other tissues such as the [[skin]], [[breast]], and [[ovaries]].
KLK2 is a single-chain glycoprotein with a molecular weight of approximately 28 kDa. It is synthesized as a preproenzyme and undergoes post-translational modifications to become an active enzyme. The active form of KLK2 contains a catalytic triad composed of histidine, aspartate, and serine residues, which are essential for its proteolytic activity.


==Function==
== Structure and Function ==
KLK2 is primarily expressed in the [[prostate gland]] and is involved in the liquefaction of seminal fluid. It acts by cleaving [[semenogelins]], which are proteins responsible for the gel-like consistency of semen. This process is crucial for sperm motility and fertility.


In addition to its role in reproduction, KLK2 has been implicated in [[prostate cancer]] progression. It is often co-expressed with [[prostate-specific antigen]] (PSA), another member of the kallikrein family, and can activate PSA by cleaving its precursor form. Elevated levels of KLK2 in the blood can be indicative of prostate cancer, making it a potential biomarker for the disease.
KLK6 is synthesized as a preproenzyme and undergoes post-translational modifications to become an active enzyme. The active form of KLK6 is involved in the degradation of extracellular matrix components, which is crucial for tissue remodeling and repair. It has been implicated in the regulation of [[cell migration]], [[inflammation]], and [[apoptosis]].


==Clinical Significance==
== Clinical Significance ==
KLK2 is being studied as a biomarker for prostate cancer diagnosis and prognosis. Its expression levels, along with PSA, can provide valuable information about the presence and aggressiveness of prostate cancer. Research is ongoing to develop KLK2-targeted therapies and diagnostic tools.


==Genetics==
KLK6 has been studied for its role in various [[neurological disorders]], including [[Alzheimer's disease]], [[Parkinson's disease]], and [[multiple sclerosis]]. Elevated levels of KLK6 have been observed in the [[cerebrospinal fluid]] of patients with these conditions, suggesting its potential as a [[biomarker]] for [[neurodegenerative diseases]].
The ''KLK2'' gene is located on chromosome 19q13.3-13.4, within a cluster of kallikrein genes. It consists of five exons and four introns, and its expression is regulated by androgen hormones. Variations in the ''KLK2'' gene have been associated with altered enzyme activity and prostate cancer risk.


==Research Directions==
In addition to its role in the nervous system, KLK6 is also being investigated for its involvement in [[cancer]] progression. It has been found to be overexpressed in certain types of [[breast cancer]] and [[ovarian cancer]], where it may contribute to [[tumor]] growth and metastasis.
Current research on KLK2 focuses on understanding its role in cancer biology, developing sensitive assays for its detection, and exploring its potential as a therapeutic target. Studies are also investigating the regulation of KLK2 expression and its interaction with other kallikreins and proteases.


==Also see==
== Mechanism of Action ==
 
KLK6 exerts its effects by cleaving specific peptide bonds in target proteins. This proteolytic activity is regulated by [[inhibitors]] and [[activators]] that modulate its function in different physiological contexts. The diagram on the right illustrates the degradation mechanism of KLK6, highlighting its interaction with various substrates and inhibitors.
 
== Research and Therapeutic Potential ==
 
Ongoing research is focused on understanding the precise role of KLK6 in health and disease. Therapeutic strategies targeting KLK6 activity are being explored, particularly in the context of [[neuroprotection]] and [[cancer therapy]]. Inhibitors of KLK6 are being developed to modulate its activity in pathological conditions.
 
== Related Pages ==
* [[Kallikrein]]
* [[Kallikrein]]
* [[Prostate-specific antigen]]
* [[Prostate cancer]]
* [[Serine protease]]
* [[Serine protease]]
 
* [[Neurodegenerative disease]]
{{Kallikreins}}
* [[Cancer biomarker]]


[[Category:Proteases]]
[[Category:Proteases]]
[[Category:Human proteins]]
[[Category:Human proteins]]
[[Category:Prostate cancer]]
[[Category:Neuroscience]]

Latest revision as of 11:37, 15 February 2025

KLK6 (Kallikrein-Related Peptidase 6)[edit]

Diagram of KLK6 degradation mechanism

KLK6, also known as kallikrein-related peptidase 6, is a serine protease enzyme encoded by the KLK6 gene in humans. It is part of the kallikrein family, which consists of 15 serine proteases with diverse physiological functions. KLK6 is predominantly expressed in the central nervous system, but it is also found in other tissues such as the skin, breast, and ovaries.

Structure and Function[edit]

KLK6 is synthesized as a preproenzyme and undergoes post-translational modifications to become an active enzyme. The active form of KLK6 is involved in the degradation of extracellular matrix components, which is crucial for tissue remodeling and repair. It has been implicated in the regulation of cell migration, inflammation, and apoptosis.

Clinical Significance[edit]

KLK6 has been studied for its role in various neurological disorders, including Alzheimer's disease, Parkinson's disease, and multiple sclerosis. Elevated levels of KLK6 have been observed in the cerebrospinal fluid of patients with these conditions, suggesting its potential as a biomarker for neurodegenerative diseases.

In addition to its role in the nervous system, KLK6 is also being investigated for its involvement in cancer progression. It has been found to be overexpressed in certain types of breast cancer and ovarian cancer, where it may contribute to tumor growth and metastasis.

Mechanism of Action[edit]

KLK6 exerts its effects by cleaving specific peptide bonds in target proteins. This proteolytic activity is regulated by inhibitors and activators that modulate its function in different physiological contexts. The diagram on the right illustrates the degradation mechanism of KLK6, highlighting its interaction with various substrates and inhibitors.

Research and Therapeutic Potential[edit]

Ongoing research is focused on understanding the precise role of KLK6 in health and disease. Therapeutic strategies targeting KLK6 activity are being explored, particularly in the context of neuroprotection and cancer therapy. Inhibitors of KLK6 are being developed to modulate its activity in pathological conditions.

Related Pages[edit]