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Reviewed January 2015
What is the official name of the SMPD1 gene?
The official name of this gene is “sphingomyelin phosphodiesterase 1.”
SMPD1 is the gene's official symbol. The SMPD1 gene is also known by other names, listed below.
Read more about gene names and symbols on the About page.
What is the normal function of the SMPD1 gene?
The SMPD1 gene provides instructions for making an enzyme called acid sphingomyelinase. This enzyme is found in lysosomes, which are small compartments in the cell that digest and recycle molecules. Acid sphingomyelinase is responsible for the conversion of a fat (lipid) called sphingomyelin into another type of lipid called ceramide. Sphingomyelin also binds (attaches) to a fat called cholesterol and helps to form other lipids that play roles in various cell processes. The formations of these lipids is critical for the normal structure and function of cells and tissues.
How are changes in the SMPD1 gene related to health conditions?
Where is the SMPD1 gene located?
Cytogenetic Location: 11p15.4-p15.1
Molecular Location on chromosome 11: base pairs 6,390,301 to 6,394,998
(Homo sapiens Annotation Release 107, GRCh38.p2) (
The SMPD1 gene is located on the short (p) arm of chromosome 11 between positions 15.4 and 15.1.
More precisely, the SMPD1 gene is located from base pair 6,390,301 to base pair 6,394,998 on chromosome 11.
See How do geneticists indicate the location of a gene? in the Handbook.
Where can I find additional information about SMPD1?
You and your healthcare professional may find the following resources about SMPD1 helpful.
You may also be interested in these resources, which are designed for genetics professionals and researchers.
What other names do people use for the SMPD1 gene or gene products?
See How are genetic conditions and genes named? in the Handbook.
Where can I find general information about genes?
The Handbook provides basic information about genetics in clear language.
These links provide additional genetics resources that may be useful.
What glossary definitions help with understanding SMPD1?
You may find definitions for these and many other terms in the Genetics Home Reference Glossary.
See also Understanding Medical Terminology.
References (8 links)
The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.