The NCAPG gene encodes a protein that is a critical component of the condensin complex, which plays a vital role in the organization, compaction, and stabilization of chromosomes during cell division. Here are the additional details you requested regarding NCAPG:

### 1. Associated Genes
While specific associations may not be detailed in the provided summaries, NCAPG is known to interact with several other genes and proteins involved in chromatin structure and cell cycle regulation. Key genes and proteins that may be associated or functionally related include:
- **NCAPD2**: A subunit of the condensin complex.
- **SMC2** and **SMC4**: Core components of the condensin complex that provide structural integrity and function.
- **TOP2A** (Topoisomerase II alpha): Involved in managing DNA supercoiling and is essential during mitosis and meiosis alongside the condensin complex.
- **CDC2**: A cyclin-dependent kinase whose activity can influence condensin complex function.

### 2. Age-Related Diseases
Though specific studies focusing exclusively on NCAPG and aging are limited, dysregulation of mitotic processes, such as chromosome condensation, is implicated in several age-related diseases, including:
- **Cancers**: Aberrant expression or function of chromosomal maintenance genes like NCAPG can lead to genomic instability, which is a hallmark of cancer cells, especially in older individuals.
- **Neurodegenerative Diseases**: Age-related decline in cell division and repair mechanisms could similarly implicate NCAPG in processes associated with diseases such as Alzheimer’s.
- Studies have also shown that proteins related to chromosome dynamics may have altered expressions in aging tissues, contributing to senescence and cellular dysfunction.

### 3. Drug Interactions
Currently, there are no specific drugs that directly target NCAPG; however, the condensin complex interacting with medications that target cell division may indirectly affect its activity. Drug classes that influence cellular processes involving NCAPG include:
- **Antineoplastic agents**: Chemotherapeutic drugs that target rapidly dividing cells may indirectly impact condensin activity.
- **Histone deacetylase inhibitors**: These agents can affect chromatin state and may influence the expression or function of genes involved in chromosome condensation and stabilization.

### 4. Pathways and Biological Processes
NCAPG is involved in several critical biological pathways and processes, including:
- **Chromosome Condensation**: The primary role of NCAPG within the condensin complex is to facilitate the organization of chromatin into condensed, mitotically stable chromosomes.
- **Cell Cycle Regulation**: It plays a fundamental role in mitosis and meiosis, governing end-to-end chromosomal integrity during cell division.
- **DNA Repair Mechanisms**: The condensin complex is involved in maintaining the proper structural configuration of DNA, which is crucial for effective DNA repair pathways.
- **Cellular Response to Topological Stress**: Interaction with type I and type II topoisomerases speaks to its role in managing DNA supercoiling and strand topology during cellular processes.

Overall, NCAPG is integral to cellular processes related to chromosome structure and segregation, making it an important gene for maintaining genomic integrity and preventing age-related anomalies.