### Gene Overview: OBP2A

**Gene Symbol:** OBP2A  
**Gene Type:** Protein-Coding  
**Location:** Chromosome 9  
**Superfamily:** Lipocalin  

#### Summarized Function
The OBP2A gene encodes a small extracellular protein that is part of the lipocalin superfamily. It plays a crucial role in the olfactory system, particularly in the transportation of small, hydrophobic, volatile molecules or odorants through nasal mucus to olfactory receptors. The protein is primarily expressed as a monomer and is capable of binding a wide range of odorants, with a noted higher affinity for aldehydes and fatty acids.

### Additional Information

1. **Associated Genes:**
   - **OBP2B:** A highly similar family member, also located in the OBP gene cluster on chromosome 9. It shares similarities in structure and function with OBP2A.
   - **Other Lipocalin Genes:** There may be additional members of the lipocalin family that have functional or structural similarities, although specific gene names may not be readily defined.

2. **Aging and Age-Related Diseases:**
   - There is limited specific research linking OBP2A directly to aging or age-related diseases. However, olfactory dysfunction has been associated with various neurodegenerative diseases such as Alzheimer's and Parkinson's, which could suggest a potential indirect link. Studies investigating the role of olfactory proteins in age-related sensory decline might provide insights into its involvement in such conditions.

3. **Drug Interactions:**
   - While specific drugs or drug classes that interact with OBP2A are not well documented in the literature, due to its role in odorant binding and potential involvement in neuropharmacology, there could be implications for general anesthetics or olfactants. Further studies may elucidate any specific pharmacological interactions or avenues for therapeutic targeting.

4. **Pathways and Biological Processes:**
   - **Olfaction:** The primary pathway associated with OBP2A is the olfactory signaling pathway, where it facilitates the binding and transport of odorants to olfactory receptors.
   - **Transport of Small Molecules:** As a transporter of hydrophobic ligands (like aldehydes and fatty acids), OBP2A participates in general processes of molecular transport.
   - **Detoxification Processes:** It might play a role in detoxifying harmful volatile compounds by sequestering them, which could be relevant in the context of environmental exposure.

### Summary
The OBP2A gene is an essential component of the olfactory system, contributing to olfactory perception and potentially offering protective functional properties in terms of odorant toxicity. Future research could further clarify its roles in aging and age-related diseases, as well as identify specific drug interactions and the pathways it is involved in.