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| LIS1 (Lissencephaly-1) |
|---|
| Gene | [LIS1](/genes/LIS1) (PAFAH1B1) |
| UniProt | P43004 |
| PDB Structures | 1R08, 1VYI |
| Molecular Weight | 46 kDa |
| Localization | Cytoplasm, microtubules |
| Protein Family | WD40 repeat family |
Lis1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
This page provides comprehensive information about this protein. See the content below for detailed information.
LIS1 (also known as PAFAH1B1) is a microtubule-associated protein that regulates dynein function and is essential for neuronal migration. It is the most common cause of isolated lissencephaly sequence.
LIS1 has a characteristic structure:
- N-terminal dimerization domain - forms functional dimers
- WD40 repeat domain (x7) - β-propeller for protein interactions
- Dynein binding site - engages dynein heavy chain
- Phosphorylation sites - regulatory control
- Nistrin homology domain - unique to LIS1 family
The WD40 domain forms a 7-bladed β-propeller that serves as a protein interaction platform.
In neurons, LIS1 performs essential functions:
- Dynein regulation - modulates dynein motor activity
- Microtubule organization - stabilizes microtubules
- Nuclear migration - guides neuronal translocation
- Cortical development - establishes proper lamination
- Axonal transport - facilitates vesicle trafficking
LIS1 mutations cause classical lissencephaly:
- Brain phenotype - smooth brain, thickened cortex
- Clinical features - severe developmental delay, seizures
- Motor deficits - hypotonia progressing to spasticity
- Age of presentation - infancy
- Prognosis - severe intellectual disability
- Chromosomal deletion including LIS1
- Lissencephaly plus facial dysmorphism
- More severe phenotype
- Early death common
¶ Subcortical Band Heterotopia
- Often with LIS1 mutations
- Milder brain malformation
- Better developmental outcome
- LIS1 in adult brain function
- Altered expression in AD
- Role in axonal transport deficits
- Reiner O, et al. (1993). "Isolation of a Miller-Dieker lissencephaly gene containing G protein beta-subunit-like repeats." Nature. 364(6439):717-721. DOI:10.1038/364717a0
- Faulkner NE, et al. (2000). "The role of dynein in the axonal transport of microtubules." J Neurosci. 20(8):3064-3072. DOI:10.1523/JNEUROSCI.20-08-03064.2000
- Vallee RB, et al. "Lissencephaly: a genetic model of neuronal migration disorder." J Clin Invest. 105(5):581-582. DOI:10.1172/JCI9524
The study of Lis1 Protein 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.