Related Experiment Videos
The organization of the human immunoglobulin lambda gene locus
K Kawasaki1, S Minoshima, K Schooler
1Department of Molecular Biology, Keio University, School of Medicine, Tokyo, Japan.
Genome Research
|September 1, 1995
Summary
Researchers mapped the human immunoglobulin lambda gene locus, revealing its 911 kb structure with seven constant region genes and 69 variable region segments. This study highlights extensive evolutionary amplification events within the locus.
Area of Science:
- Genetics
- Immunology
- Genomics
Background:
- The human immunoglobulin lambda (IGL) gene locus is crucial for adaptive immunity but its complex structure has hindered detailed analysis.
- Understanding the IGL locus organization is essential for insights into immune system development and genetic disorders.
Purpose of the Study:
- To construct a comprehensive physical map of the human IGL gene locus.
- To elucidate the complete structure, size, and gene content of the IGL locus.
Main Methods:
- Construction of a 1020-kb contig using cosmid and bacterial artificial chromosome (BAC) clones.
- High-resolution physical mapping and hybridization analysis to identify gene segments and sequences.
Main Results:
- The human IGL locus spans 911 kb, containing seven constant region (C lambda) gene segments.
- Identified 69 unique variable region gene (V lambda) segments and additional genes like VpreB, BCRL4, and GGT-like sequences.
- Hybridization analysis indicated significant gene amplification events during the evolution of the IGL locus.
Conclusions:
- A detailed physical map of the human IGL locus has been established.
- The IGL locus contains a complex arrangement of V lambda and C lambda genes, alongside other functional sequences.
- Evidence suggests extensive evolutionary amplification has shaped the structure of the human IGL gene locus.