Structure and Expression Analyses of SVA Elements in Relation to Functional Genes.

Area of Science:

• Genomics
• Molecular Biology
• Bioinformatics

Background:

• SINE-VNTR-Alu (SVA) elements are mobile genetic sequences found in hominoid primates.
• These elements are active in the human genome and are classified into six subfamilies (SVA-A to SVA-F).

Purpose of the Study:

• To identify genes associated with SVA elements in the human genome.
• To investigate the genomic locations and functional impact of SVA elements on gene transcription and regulation.

Main Methods:

• Bioinformatic analysis to identify SVA element-associated genes.
• Genomic structure analysis to determine SVA element locations (5' UTR, 3' UTR).
• Analysis of alternative splicing and transcript isoforms resulting from SVA element integration.

Main Results:

• 22 SVA element-associated genes were identified in the human genome.
• SVA elements were found in the 5' and 3' untranslated regions (UTRs) of numerous genes, including HGSNAT, MRGPRX3, HYAL1, and TDRKH.
• SVA elements contributed to exon extension, polyadenylation signals, and alternative splicing events, leading to transcript isoforms.
• Tissue-specific expression patterns were observed for certain SVA-associated transcripts, such as HYAL1_SVA in lung tissue.

Conclusions:

• SVA elements are integrated into human genes, generating transcript isoforms.
• These SVA-induced transcript variations play a role in modulating gene regulation across various human tissues.
• SVA elements represent a significant source of genetic and regulatory diversity in the human genome.