Related Experiment Videos
A heat shock gene at 14q22: mapping and expression
A F Roux1, V T Nguyen, J A Squire
1Department of Genetics, Hospital for Sick Children, Toronto, Ontario, Canada.
Human Molecular Genetics
|October 1, 1994
Summary
Researchers identified and mapped a novel heat shock protein gene, HSPA2, on chromosome 14. This gene is expressed in various human tissues and shows high similarity to known heat shock protein genes.
Area of Science:
- Molecular Biology
- Genetics
- Human Physiology
Background:
- Heat shock proteins (HSP) are crucial molecular chaperones involved in protein homeostasis.
- Several HSP genes are located within the major histocompatibility complex (MHC) on chromosome 6.
- Previous studies indicated HSP gene sequences on chromosome 14.
Purpose of the Study:
- To clone and map a novel heat shock protein gene (HSPA2) on chromosome 14.
- To characterize the expression pattern and genetic variations of the HSPA2 gene.
Main Methods:
- Genomic probing using a probe derived from MHC-located HSP genes.
- Screening of a chromosome 14-specific cosmid library.
- Somatic cell hybrid panel analysis and Fluorescence In Situ Hybridization (FISH) for gene localization.
- Analysis of pentanucleotide repeat motifs for allelic variations.
Main Results:
- Cloning and identification of the HSPA2 gene on chromosome 14.
- High sequence identity of HSPA2 to known MHC-HSP genes and mouse Hspa2.
- Abundant expression of HSPA2 in muscle, heart, esophagus, and brain; lower expression in testis.
- Localization of HSPA2 to chromosome region 14q22.
- Identification of a pentanucleotide repeat motif with seven observed alleles.
Conclusions:
- The HSPA2 gene represents a newly identified member of the heat shock protein family on human chromosome 14.
- The gene's expression profile suggests diverse functional roles in human tissues.
- Genetic variations, indicated by the pentanucleotide repeat, may contribute to individual differences.