| CTSF — Cathepsin F | |
|---|---|
| Symbol | CTSF |
| Full Name | Cathepsin F |
| Chromosome | 11q13.2 |
| NCBI Gene | 8722 |
| Ensembl | ENSG00000174080 |
| OMIM | 608536 |
| UniProt | Q9UJW0 |
| Diseases | Neuronal Ceroid Lipofuscinosis (CLN10) |
| Expression | Cerebral cortex, Cerebellum, Lysosomal tissues |
CTSF (Cathepsin F) is a gene located on chromosome 11q13.2 that encodes a lysosomal cysteine protease of the papain family. It is catalogued as NCBI Gene ID 8722 and OMIM 608536. Mutations in CTSF cause CLN10 disease, a severe form of neuronal ceroid lipofuscinosis (Batten disease) characterized by early-onset neurodegeneration.
The protein encoded by CTSF is CTSF Protein.[1]
Cathepsin F is a lysosomal cysteine protease that plays a critical role in intracellular protein degradation. As a member of the cathepsin family, CTSF participates in the breakdown of proteins within lysosomes, a process essential for cellular homeostasis and neuronal survival.
CLN10 disease caused by CTSF mutations is one of the most severe forms of neuronal ceroid lipofuscinosis, with symptoms manifesting in infancy or early childhood. The disease involves progressive loss of neuronal function, visual impairment, seizures, and premature death.[2]
CTSF encodes a lysosomal cysteine protease with endopeptidase activity. The protein is synthesized as a preproenzyme and processed to its active form within lysosomes. Cathepsin F belongs to the papain family (C1 family) of cysteine proteases and shares structural homology with other cathepsins (B, L, S, K).[3]
The CTSF protein contains:
Within lysosomes, CTSF participates in:
CTSF is expressed in multiple brain regions:
Expression data is available from the Allen Human Brain Atlas.
In neurons, CTSF localizes to:
CLN10 is caused by recessive mutations in CTSF, leading to deficiency of cathepsin F enzymatic activity. This results in accumulation of ceroid lipofuscins—lipopigments composed of lipids and proteins—in lysosomes throughout the body, particularly in neurons.
Clinical Features:
Genotype-Phenotype Correlation:
While primarily associated with CLN10, CTSF dysfunction may contribute to:
Loss of CTSF function leads to accumulation of:
These accumulations disrupt neuronal function and trigger inflammatory responses.
CTSF deficiency impairs autophagic flux:
Neuronal loss in CLN10 involves:
Recombinant cathepsin F delivery through:
AAV-mediated CTSF delivery approaches:
Pharmacological approaches:
CTSF activity can serve as a biomarker:
The study of Ctsf Gene (Cln10) has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.