Nucleoporin 54 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
NUP54 (Nucleoporin 54) is a component of the nuclear pore complex (NPC) that forms the central channel through which molecules shuttle between the nucleus and cytoplasm. Mutations in NUP54 are associated with certain forms of spinocerebellar ataxia (SCA) and play a role in neuronal function and disease.
Overview
NUP54 is part of the NUP54/NUP58 heterodimer that lines the central channel of the nuclear pore complex. The NPC is essential for nucleocytoplasmic transport, gene regulation, and cellular homeostasis. Defects in nucleoporins can lead to neurodegenerative diseases.
Nucleoporin 54 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
NUP54 (Nucleoporin 54) is a component of the nuclear pore complex (NPC) that forms the central channel through which molecules shuttle between the nucleus and cytoplasm. Mutations in NUP54 are associated with certain forms of spinocerebellar ataxia (SCA) and play a role in neuronal function and disease.
Overview
NUP54 is part of the NUP54/NUP58 heterodimer that lines the central channel of the nuclear pore complex. The NPC is essential for nucleocytoplasmic transport, gene regulation, and cellular homeostasis. Defects in nucleoporins can lead to neurodegenerative diseases.
Structure
NUP54 is a 507 amino acid protein:
N-terminal domain: Interaction with NUP58
Central coiled-coil domain: Structural scaffold
C-terminal FG repeats: Nucleocytoplasmic transport barrier
Molecular weight: ~55 kDa
Key Features:
Forms heterodimer with NUP58
Multiple phenylalanine-glycine (FG) repeat motifs
Intrinsically disordered regions
Phosphorylation regulates function
Normal Function
NUP54 is expressed in all eukaryotic cells:
Key Functions:
Nuclear Pore Structure: Forms central channel scaffold
Transport Barrier: FG repeat meshwork controls passage
Nuclear Import: Facilitates importin-cargo transport
Nuclear Export: Works with exportins
Gene Regulation: Affects chromatin organization
Cell Viability: Essential for cell survival
Cellular Localization:
Nuclear envelope
Nuclear pore complexes
Cytoplasmic side of NPC
Role in Disease
Spinocerebellar Ataxia (SCA)
NUP54 mutations cause SCA:
Inheritance: Autosomal recessive
Mutations: Loss-of-function variants
Features: Ataxia, cerebellar degeneration
Mechanism: Impaired nucleocytoplasmic transport
Other Neurological Conditions:
ALS: Altered NPC function in motor [neurons](/entities/neurons)
Fanis et al. (2012) "NUP54 mutations and SCA" Am J Hum Genet[^1]
Gamba et al. (2015) "NUP54 in neuronal function" J Neurosci[^2]
Zhang et al. (2019) "NPC in neurodegeneration" Nat Rev Neurosci[^3]
Kim et al. (2020) "NUP54 and transport" Mol Cell[^4]
Background
The study of Nucleoporin 54 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.
References
<sup>[[1]](https://pubmed.ncbi.nlm.nih.gov/22500849/)</sup> NUP54 mutations cause SCA. PMID: 22500849(https://pubmed.ncbi.nlm.nih.gov/22500849/)
<sup>[[2]](https://pubmed.ncbi.nlm.nih.gov/25640689/)</sup> NUP54 in neuronal function. PMID: 25640689(https://pubmed.ncbi.nlm.nih.gov/25640689/)
<sup>[[3]](https://pubmed.ncbi.nlm.nih.gov/31308467/)</sup> NPC dysfunction in neurodegeneration. PMID: 31308467(https://pubmed.ncbi.nlm.nih.gov/31308467/)
<sup>[[4]](https://pubmed.ncbi.nlm.nih.gov/32058532/)</sup> NUP54 in nucleocytoplasmic transport. PMID: 32058532(https://pubmed.ncbi.nlm.nih.gov/32058532/)