SLC30A10 (Zinc Transporter 10) is a critical membrane transporter protein that plays essential roles in metal ion homeostasis, particularly manganese and zinc. This protein has emerged as particularly important in neurodegenerative diseases due to its role in preventing manganese accumulation in the brain. [@slca]
SLC30A10 (also known as ZnT10) is a member of the zinc transporter (ZnT) family, which consists of ten members (ZnT1-10) that facilitate zinc and/or manganese efflux from cells or into intracellular organelles. [@zinc]
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SLC30A10 Protein
Overview
SLC30A10 (Zinc Transporter 10) is a critical membrane transporter protein that plays essential roles in metal ion homeostasis, particularly manganese and zinc. This protein has emerged as particularly important in neurodegenerative diseases due to its role in preventing manganese accumulation in the brain. [@slca]
SLC30A10 (also known as ZnT10) is a member of the zinc transporter (ZnT) family, which consists of ten members (ZnT1-10) that facilitate zinc and/or manganese efflux from cells or into intracellular organelles. [@zinc]
While originally characterized as a zinc transporter, SLC30A10 has proven to be a major manganese transporter with critical importance in preventing manganese neurotoxicity.
Gene and Protein Structure
Gene Information
The SLC30A10 gene is located on chromosome 1q41 and encodes a protein of approximately 460 amino acids. The gene is expressed in multiple tissues, with particularly high expression in the brain, liver, and intestine.
Protein Structure
SLC30A10 has characteristic features of ZnT family proteins: [@structure]
Six transmembrane domains: Form the metal transport channel
N-terminal extracellular loop: Contains metal binding sites
C-terminal intracellular domain: Regulates transport activity
HEXXH motif: Conserved metal binding sequence in transmembrane domain 5
Normal Function
Metal Ion Transport
SLC30A10 functions as a metal ion antiporter: [@manganese]
Manganese efflux: Primary function - exports manganese from cells
Zinc transport: Can also transport zinc, though with lower affinity
Cellular homeostasis: Prevents accumulation of toxic metal levels
[Blood-brain barrier](/entities/blood-brain-barrier): Expressed at BBB, regulates brain manganese entry
Tissue Distribution
[Neurons](/entities/neurons): Protects dopaminergic neurons from manganese toxicity
[Astrocytes](/entities/astrocytes): Major site of brain manganese handling
Liver: Involved in systemic manganese excretion
Intestine: Regulates dietary manganese absorption
Role in Neurodegeneration
Manganism (Manganese-Induced Parkinsonism)
SLC30A10 is central to understanding manganism: [@slcaa]
Loss-of-function mutations: Cause hereditary manganese metabolism disorder
Manganese accumulation: Loss leads to excess manganese in basal ganglia
Parkinsonian features: Clinical presentation resembles PD but distinct
Exposed populations: Welders and industrial workers at risk
Parkinson's Disease
SLC30A10 has relevance to idiopathic PD: [@manganesea]
Dopaminergic neurons: High manganese exposure selectively affects these neurons
Genetic variants: May modify PD risk in exposed populations
Metal interaction: Manganese can interact with [alpha-synuclein](/proteins/alpha-synuclein) aggregation
Other Neurodegenerative Conditions
Amyotrophic Lateral Sclerosis: Altered metal homeostasis