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SLC35A3
solute carrier family 35 member A3
SLC35A3 is located on the short (p) arm of chromosome 1, at band 1p21.2. Arm ratio per GRCh38 - banding schematic.
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Overview
SLC35A3 is a member of the solute carrier family 35, which comprises transmembrane proteins responsible for transporting nucleotide sugars and other molecules across intracellular membranes. Located on chromosome 1, this gene encodes a transporter protein that spans cellular membranes multiple times, creating channels through which specific molecules can pass.
Whilst the precise biological role of SLC35A3 remains an active area of research, solute carrier proteins generally participate in fundamental cellular processes including glycosylation, metabolic regulation, and the distribution of essential molecules between cellular compartments. Understanding the function of individual SLC family members helps clarify how cells maintain proper biochemical balance and respond to changing environmental conditions.
What the gene does
The SLC35A3 protein functions as a transmembrane transporter, embedded within cellular membranes where it facilitates the movement of specific molecules between compartments. Members of the SLC35 subfamily typically transport nucleotide sugars from the cytoplasm into the endoplasmic reticulum and Golgi apparatus, where these sugars serve as building blocks for glycosylation reactions.
Glycosylation involves attaching sugar molecules to proteins and lipids, a modification that influences protein folding, stability, trafficking, and function. By controlling the availability of nucleotide sugars within these cellular compartments, SLC35A3 likely contributes to the proper glycosylation of numerous proteins throughout the cell.
The transport mechanism employed by SLC35 family members generally involves antiport activity, exchanging one molecule for another across the membrane. This exchange maintains concentration gradients and ensures that synthetic pathways within the endoplasmic reticulum and Golgi have adequate substrate availability whilst removing reaction by-products.
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Chromosome location
SLC35A3 is located on the short arm of chromosome 1 at position 21.2, designated as 1p21.2. This chromosomal region contains numerous genes involved in diverse cellular functions. The specific exon count and detailed genomic structure of SLC35A3 have not been extensively characterised in publicly available databases, though the gene produces messenger RNA that is translated into a membrane-spanning protein.
Protein structure
Domain architecture has not been experimentally characterised in detail for this protein. Like other solute carrier family members, the SLC35A3 protein is predicted to contain multiple transmembrane segments that traverse cellular membranes, forming a channel or pore through which substrates can pass. The precise number and arrangement of these transmembrane domains, along with any regulatory or substrate-binding regions, await further structural investigation through experimental techniques such as crystallography or cryo-electron microscopy.
Key variants
Genetic variants in SLC35A3 may alter the protein's transport activity, stability, or expression level. As with other transporter genes, changes affecting transmembrane regions could potentially disrupt substrate recognition or the conformational changes required for transport. The inheritance pattern associated with SLC35A3 variants may vary depending on the specific genetic change and its functional impact.
No pathogenic or likely-pathogenic ClinVar variants recorded yet for this gene.
Associated conditions
Currently, SLC35A3 is not definitively associated with specific inherited conditions in major clinical genetics databases. Research into solute carrier proteins continues to expand our understanding of how disruptions in cellular transport contribute to disease. As genomic studies identify new gene-disease relationships, the clinical significance of SLC35A3 variants may become clearer through population-scale sequencing efforts and functional laboratory studies.
No disease links recorded for this gene in our reference set.
UK clinical status
Sources: NHS GMS PanelApp · Genomics England PanelApp · NHS National Genomic Test Directory
Frequently asked questions
What does the SLC35A3 gene do?
SLC35A3 encodes a membrane transporter protein that likely moves nucleotide sugars and other molecules across cellular membranes. This transport function supports glycosylation and other metabolic processes within cells.
Where is the SLC35A3 gene located?
The SLC35A3 gene is located on chromosome 1 at position 1p21.2, on the short arm of the chromosome.
Is SLC35A3 included in UK clinical genetic testing panels?
SLC35A3 is not currently included in NHS Genomic Medicine Service testing panels for inherited conditions. Clinical testing availability may change as research identifies new gene-disease associations.