The FRMPD3 gene encodes a protein that plays significant roles in cell signaling and interactions, thanks to its unique structural features—the PDZ domain and the FERM domain. Here's a detailed overview of the FRMPD3 gene, along with the requested additional information:

### 1. Associated Genes
While specific interacting partners and associated genes may not always be comprehensively cataloged, some relevance can be inferred based on the known function of FRMPD3:

- **AP2M1**: Related to endocytosis processes, which could intersect with FRMPD3 function given its role in membrane-associated signaling.
- **CASK**: A scaffolding protein that interacts with PDZ domain-containing proteins.
- **Cavin1**: May interact functionally in the context of membrane dynamics and cytoskeleton associations.

### 2. Aging and Age-Related Diseases
Currently, direct associations between the FRMPD3 gene and aging or specific age-related diseases are not extensively documented. However, potential implications may arise due to its signaling functions, which could intersect with pathways involved in:
- **Neurodegeneration**: Given its synaptic-related origins, any dysregulation could be linked to age-related cognitive decline or disorders like Alzheimer's disease.
- **Cellular Stress Responses**: The gene's involvement in cytoskeletal organization could be pivotal in the aging process as cellular integrity becomes contested in age-related pathologies.

### 3. Drug Interactions
As of now, there are no explicitly documented drugs or drug classes that directly target the FRMPD3 gene or its encoded protein. However, general classes of drugs that may influence signal transduction or cytoskeletal dynamics (e.g., certain cancer therapeutics or neurologically active agents) could impact processes where the protein plays a role. It may also be of interest in research contexts using kinase inhibitors or drugs targeting synaptic functions.

### 4. Pathways and Biological Processes
FRMPD3 is implicated in several biological pathways and processes, which include:
- **Signal Transduction**: Its role as a scaffolding protein positions it strategically for mediating cellular signaling pathways.
- **Protein-Protein Interactions**: The PDZ domain promotes interactions with a wide range of proteins, affecting various signaling cascades.
- **Endocytosis and Vesicle Trafficking**: Its FERM domain suggests a role in membrane dynamics and cytoskeletal interactions vital for vesicular transport.
- **Developmental Processes**: Like many PDZ and FERM domain-containing proteins, it may play roles in cellular structure and differentiation, relevant in both neuronal development and potentially other tissues.

### Summary
The FRMPD3 gene is a crucial component in signal transduction, leveraging its PDZ and FERM domains to facilitate protein interactions and cellular dynamics. While specific associations with other genes, age-related diseases, and drug interactions are less clear-cut, ongoing research into its functional networks and implications in health and disease contexts continues to be of significance.