OR1A1

OR1A1 is a gene that encodes the olfactory receptor 1A1 protein in humans. The olfactory receptor family is believed to be the largest gene family in the human genome. These receptors are responsible for the detection of odor molecules, playing a crucial role in the sense of smell.

Function

The OR1A1 gene belongs to the olfactory receptor gene family, which is a part of the G protein-coupled receptor superfamily. The olfactory receptors interact with odorant molecules in the nose to initiate a neuronal response, resulting in the perception of a smell. The OR1A1 gene provides instructions for making a protein that is located in the membranes of cells in the nose. This protein detects certain odor molecules and sends signals to the brain, providing the sense of smell.

Structure

The OR1A1 gene is located on the short (p) arm of chromosome 11 at position 15. The exact location is 11p15.4, from base pair 3,000,000 to base pair 3,100,000. The gene spans approximately 1,000 base pairs. The OR1A1 gene produces a protein that is 312 amino acids long.

Clinical significance

Mutations in the OR1A1 gene can lead to a reduced ability to smell, a condition known as anosmia. In some cases, mutations can cause a complete loss of smell. Research is ongoing to determine the full range of conditions that can be caused by mutations in this gene.

See also

• Olfactory receptor
• Olfactory system
• Anosmia
• Chromosome 11