The structural gene for transferrin (TF) maps to 3q21----3qter

Area of Science:

• Human Genetics
• Molecular Biology
• Gene Mapping

Background:

• Transferrin (TF) is a key iron transport protein.
• Previous studies had not precisely localized the human TF gene.
• Understanding gene localization is crucial for genetic research and disease association.

Purpose of the Study:

• To determine the chromosomal location of the human transferrin (TF) gene.
• To refine the localization of the TF gene to a specific chromosome region.
• To investigate the potential co-localization of TF with other related genes.

Main Methods:

• Utilized a cloned human cDNA for transferrin (TF) as a hybridization probe.
• Analyzed rodent x human somatic cell hybrids to detect human TF sequences.
• Employed cell hybrids with translocated chromosome 3 and patient fibroblasts trisomic for 3q21-3qter for precise mapping.

Main Results:

• Successfully mapped the human TF gene to chromosome 3.
• Further refined the TF gene localization to the 3q21-3qter region.
• Demonstrated co-localization of the TF gene with the transferrin receptor (TFR) gene in the 3q2 region.
• Indicated that genes for pseudocholinesterase (CHE1), ceruloplasmin (CP), and alpha-2HS-glycoprotein (A2HS) also map to chromosome 3.

Conclusions:

• The human transferrin (TF) gene is located on chromosome 3 in the region 3q21-3qter.
• This region (3q2) is defined as an iron transport region, potentially including the transferrin-related tumor antigen p97.
• Established the chromosomal linkage of TF, TFR, CHE1, CP, and A2HS genes to human chromosome 3.