Cln3 Protein (Battenin) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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| Attribute | Value |
|---|---|
| Protein Name | Battenin |
| Gene | CLN3 |
| UniProt ID | Q9UQ16 |
| PDB Structure | No structure available |
| Molecular Weight | 48 kDa |
| Subcellular Localization | Lysosomal membrane, Endosomal membrane |
| Protein Family | CLN3 family, transmembrane proteins |
CLN3 protein (also known as Battenin) is a lysosomal and endosomal transmembrane protein encoded by the CLN3 gene. It plays a critical role in maintaining lysosomal function, autophagy, and neuronal survival. Mutations in the CLN3 gene cause Juvenile Neuronal Ceroid Lipofuscinosis (JNCL), also known as Batten disease[1].
CLN3 is a 438-amino acid integral membrane protein with the following features:
Cytosol
|
TM1 -- lumenal loop -- TM2
|
TM3 -- lumenal loop -- TM4
|
TM5 -- lumenal loop -- TM6
|
Cytosol
CLN3/Battenin is a lysosomal membrane protein involved in:
CLN3 interacts with:
In JNCL, CLN3 mutations lead to:
CLN3 mutations cause the most common form of Batten disease:
| Mutation | Type | Effect |
|---|---|---|
| Δex1-7 | Deletion | 73% of alleles, severe loss |
| P334L | Missense | Partial function |
| G225R | Missense | Partial function |
| Y181X | Nonsense | Truncated protein |
| Approach | Stage | Notes |
|---|---|---|
| AAV gene therapy | Preclinical | Delivers functional CLN3 |
| Small molecules | Discovery | Autophagy enhancers |
| Enzyme replacement | Early | Lysosomal delivery |
CLN3 protein interacts with:
| Partner | Interaction Type | Function |
|---|---|---|
| RAB7 | Binding | Endosomal trafficking |
| RAB9 | Binding | Lysosomal transport |
| HSP70 | Chaperone | Protein folding |
| LAMP1/2 | Co-localization | Lysosomal membrane |
The study of Cln3 Protein (Battenin) 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.
Last updated: March 2026