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Reviewed October 2012
What is the official name of the PRSS1 gene?
The official name of this gene is “protease, serine, 1 (trypsin 1).”
PRSS1 is the gene's official symbol. The PRSS1 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 PRSS1 gene?
The PRSS1 gene provides instructions for making an enzyme called cationic trypsinogen. This enzyme is a serine peptidase, which is a type of enzyme that cuts (cleaves) other proteins into smaller pieces. Cationic trypsinogen is produced in the pancreas and helps with the digestion of food. Cationic trypsinogen is secreted by the pancreas and transported to the small intestine, where it is cleaved to form trypsinogen. When the enzyme is needed, trypsinogen is cleaved again into its working (active) form called trypsin. Trypsin aids in digestion by cutting protein chains at the protein building blocks (amino acids) arginine or lysine, which breaks down the protein. Trypsin also turns on (activates) other digestive enzymes that are produced in the pancreas to further facilitate digestion.
A particular region of trypsin is attached (bound) to a calcium molecule. As long as trypsin is bound to calcium, the enzyme is protected from being broken down. When digestion is complete and trypsin is no longer needed, the calcium molecule is removed from the enzyme, which allows trypsin to be broken down.
Does the PRSS1 gene share characteristics with other genes?
The PRSS1 gene belongs to a family of genes called PRSS (serine peptidases).
A gene family is a group of genes that share important characteristics. Classifying individual genes into families helps researchers describe how genes are related to each other. For more information, see What are gene families? in the Handbook.
How are changes in the PRSS1 gene related to health conditions?
Where is the PRSS1 gene located?
Cytogenetic Location: 7q34
Molecular Location on chromosome 7: base pairs 142,740,234 to 142,753,075
The PRSS1 gene is located on the long (q) arm of chromosome 7 at position 34.
More precisely, the PRSS1 gene is located from base pair 142,740,234 to base pair 142,753,075 on chromosome 7.
See How do geneticists indicate the location of a gene? in the Handbook.
Where can I find additional information about PRSS1?
You and your healthcare professional may find the following resources about PRSS1 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 PRSS1 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 PRSS1?
acids ; amino acid ; arginine ; calcium ; digestion ; digestive ; enzyme ; gene ; hereditary ; histidine ; immune response ; inflammation ; intestine ; lysine ; molecule ; mutation ; pancreas ; pancreatic ; pancreatitis ; protease ; protein ; serine ; tissue ; trypsin
You may find definitions for these and many other terms in the Genetics Home Reference Glossary.
See also Understanding Medical Terminology.
References (6 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.