Laptm4B Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| LAPTM4B - Lysosomal Associated Transmembrane Protein 4 Beta | |
|---|---|
| Gene Symbol | LAPTM4B |
| Full Name | Lysosomal Associated Transmembrane Protein 4 Beta |
| Chromosomal Location | 2q21.1 |
| NCBI Gene ID | 55355 |
| Ensembl ID | ENSG00000167996 |
| UniProt ID | Q9Y5G5 |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Cancer (Breast, Ovarian, Liver) |
| Protein | LAPTM4B Protein |
LAPTM4B (Lysosomal Associated Transmembrane Protein 4 Beta) is a member of the LAPTM family with important roles in lysosomal function, autophagy, and cell proliferation. Unlike its alpha counterpart, LAPTM4B is frequently overexpressed in cancers and has been studied extensively as a cancer biomarker. In the brain, it plays roles in neuronal survival and is implicated in neurodegenerative diseases.
The LAPTM4B gene is located on chromosome 2q21.1 and encodes a protein of approximately 347 amino acids. The gene contains multiple exons and is subject to alternative splicing.
LAPTM4B is a lysosomal membrane protein:
LAPTM4B has growth-promoting functions:
The protein modulates autophagy:
LAPTM4B shows distinct expression patterns:
LAPTM4B contributes to AD pathogenesis:
Autophagy impairment: Altered expression affects autophagic flux in AD brains[1]
Lysosomal dysfunction: Contributes to lysosomal membrane instability
Neuronal vulnerability: May affect neuronal survival in vulnerable brain regions
In Parkinson's disease, LAPTM4B has complex roles:
Alpha-synuclein handling: May affect clearance of alpha-synuclein aggregates
Mitochondrial function: Contributes to mitochondrial quality control
Dopaminergic neuron survival: Modulates survival pathways in vulnerable neurons
LAPTM4B is an important oncogene:
The study of Laptm4B Gene 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.