The Sp6 locus uses several promoters and generates sense and antisense transcripts

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• The SP/KLF transcription factor family comprises over 25 members with a conserved C(2)H(2) zinc finger DNA-binding domain.
• The Sp6 transcription factor, a member of the SP subfamily, had an uncharacterized 5' end, with epiprofin identified as a variant.
• Sp6 and epiprofin were previously considered synonyms, highlighting a gap in understanding Sp6 transcript structure.

Purpose of the Study:

• To elucidate the complete transcript structure of the Sp6 gene.
• To investigate the existence and characteristics of Sp6 transcript variants.
• To identify and analyze novel Sp6-related transcripts and their tissue distribution.

Main Methods:

• Bioinformatic prediction and cDNA isolation.
• Quantitative reverse transcription PCR (RT-PCR) for transcript abundance analysis.
• Fluorescence in situ hybridization (FISH) for gene locus mapping.

Main Results:

• The Sp6 gene utilizes two distinct promoters, generating two transcript variants differing in their first exon.
• An Sp6 opposite strand transcript (Sp6os) was identified.
• The Sp6 gene locus was mapped to mouse chromosome 11D using FISH.

Conclusions:

• The Sp6 gene exhibits complex transcriptional regulation through alternative promoter usage.
• The identification of Sp6os suggests novel regulatory mechanisms or functions.
• Understanding Sp6 transcript variants and their expression is crucial for comprehending its role in biological processes.