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The human tuftelin gene: cloning and characterization.
1Dental Research Unit, Department of Oral Biology, Institute of Dental Sciences, Hebrew University, Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
Gene
|December 6, 2001
Summary
Tuftelin is crucial for enamel development and mineralization. Researchers characterized human tuftelin, identifying alternative mRNA transcripts and a promoter region, suggesting a universal function beyond teeth.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Tuftelin's role in enamel development and mineralization is suggested.
- Understanding tuftelin's function requires detailed molecular characterization.
Purpose of the Study:
- To isolate and characterize the full-length human tuftelin cDNA.
- To analyze the human tuftelin gene structure, alternative splicing, and promoter region.
- To investigate the expression of tuftelin in non-mineralizing tissues.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR)
- Rapid amplification of cDNA ends (5' RACE and 3' RACE)
- DNA sequencing
- Primer extension analysis
- Blast search of expressed sequence tag databases
Main Results:
- Full-length human tuftelin cDNA was isolated, encoding a 390 amino acid protein.
- Human tuftelin shares high sequence identity with bovine and mouse orthologs.
- Two alternatively spliced tuftelin mRNA transcripts were identified in human tooth buds.
- The human tuftelin gene spans over 26 kb and contains 13 exons.
- Multiple transcription initiation sites and a promoter region with transcription factor binding sites were identified.
- Tuftelin cDNA sequences are expressed in normal and cancerous non-mineralizing soft tissues, indicating a universal function.
Conclusions:
- Tuftelin exhibits alternative splicing and has a promoter with regulatory elements.
- Tuftelin expression in non-mineralizing tissues suggests a broader biological role.
- This study provides a foundation for further research into tuftelin's functions.