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Structure of the human gene encoding the associated microfibrillar protein (MFAP1) and localization to chromosome
1Department of Anatomy and Histology, School of Dental Medicine, University of Pennsylvania, Philadelphia 19104.
Abstract:
Microfibrils with a diameter of 10-12 nm, found either in association with elastin or independently, are an important component of the extracellular matrix of many tissues. To extend our understanding of the proteins composing these microfibrils, the cDNA and gene encoding the human associated microfibril protein (MFAP1) have been cloned and characterized. The coding portion is contained in 9 exons, and the sequence is very homologous to the previously described chick cDNA, but does not appear to share homology or domain motifs with any other known protein. Interestingly, the gene has been localized to chromosome 15q15-q21 by somatic hybrid cell and chromosome in situ analyses. This is the same chromosomal region to which the fibrillin gene, FBN1, known to be defective in the Marfan syndrome, has been mapped. MFAP1 is a candidate gene for heritable diseases affecting microfibrils.
Insights
Researchers cloned and characterized the human associated microfibril protein (MFAP1) gene. This protein is crucial for extracellular matrix microfibrils and may be linked to heritable microfibril diseases.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Microfibrils are essential extracellular matrix components, often associated with elastin.
- Understanding microfibril proteins is key to comprehending tissue structure and function.
Purpose of the Study:
- To clone and characterize the human associated microfibril protein (MFAP1) gene.
- To investigate the genetic basis of microfibril composition and its relation to disease.
Main Methods:
- cDNA and gene cloning of human MFAP1.
- Sequence homology analysis.
- Chromosomal localization using somatic hybrid cell and in situ hybridization.
Main Results:
- The human MFAP1 gene was successfully cloned and characterized.
- MFAP1 sequence shows homology to chick cDNA but no other known proteins.
- The MFAP1 gene is mapped to chromosome 15q15-q21.
Conclusions:
- MFAP1 is a novel protein component of microfibrils.
- The chromosomal location of MFAP1 is syntenic to the fibrillin gene (FBN1).
- MFAP1 is a candidate gene for heritable disorders affecting microfibrils, such as Marfan syndrome.