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Identification and characterization of an MGSA/GRO pseudogene
R L Shattuck-Brandt1, L D Wood, A Richmond
1Department of Cell Biology, Vanderbilt University School of Medicine, Nashville, TN, 37212-2637, USA.
DNA Sequence : the Journal of DNA Sequencing and Mapping
|January 1, 1997
Summary
Researchers identified a pseudogene, MGSA/GRO delta, related to melanoma growth stimulatory activity/growth related protein (MGSA/GRO) genes. This pseudogene contains mutations characteristic of non-functional gene copies.
Area of Science:
- Genetics
- Molecular Biology
- Cancer Research
Background:
- Three linked CXC-chemokine melanoma growth stimulatory activity/growth related protein (MGSA/GRO) genes are known and mapped to chromosome 4q12-q13.
- Understanding gene families and their pseudogenes is crucial for comprehending genomic regulation and evolution.
Purpose of the Study:
- To isolate and characterize a novel pseudogene related to the MGSA/GRO gene family.
- To investigate the structural and sequence features of the identified pseudogene.
Main Methods:
- Gene isolation and characterization.
- Sequence analysis of the pseudogene and comparison to functional MGSA/GRO genes.
- Hybridization studies to assess sequence homology.
Main Results:
- A pseudogene, MGSA/GRO delta, was identified with 83% sequence similarity to MGSA/GRO alpha in specific regions (5' UTR, exons 1-2, intron 1).
- The 5' upstream sequence of MGSA/GRO delta contains conserved regulatory elements (NF-kappa B motif, TATA box).
- Significant sequence divergence after exon 2, absence of exon 3-4 homologous sequences, altered translation initiation codon, and a frame shift mutation within exon 2 were observed.
Conclusions:
- MGSA/GRO delta exhibits multiple mutations (e.g., altered start codon, frame shift) characteristic of pseudogenes.
- These findings contribute to the understanding of pseudogene formation and evolution within the MGSA/GRO gene family.
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