Marfan syndrome is a type of mutation that has a minus effect in humans. It is acquire as a plethoric trait. It is carried by a gene called FBN1, which encodes a connective protein called fibrillin-1. spate have a pair of FBN1 genes and because it is dominant, people who have inherited one affected FBN1 gene from either p atomic number 18nt get out have Marfan.
Marfan syndrome has a range of expressions, from mild to severe. The most sincere complications be defects of the heart valves and aorta. It may also affect the lungs, eyes, the dural sac surrounding the spinal cord, skeleton and the hard palate.
Microfibrils are found in the extracellular matrix of connective tissue and give it its long-range elasticity. Their main component is fibrillin, the protein that is defective in Marfan syndrome. Fibrillin is encoded by the FBN1 gene on chromosome 15. This consists of 66 exons spread everyplace 235 kb of genomic DNA. The spliced mRNA is 9749 nt long. When ribosomes start translating the mRNA the first 27 amino acids produced (the signal peptide) bind to the endoplasmic reticulum.
The 2781 amino acid polypeptide is thusly injected into the lumen of the endoplasmic reticulum as it is synthesized. Here the signal peptide is cleaved off, the twine folds into more than 50 structural domains, each held together by multiple SS bridges between cysteine residues and sugars are attached to 14 asparagine residues. This protein is exported as single molecules, or peradventure dimers. Once outside the cell, fibrillin molecules are assembled and cross-linked in specific ways to form microfibrils, large structures that appear under the electron microscope as a string of beads. Each bead consists of folded cross-linked fibrillin-1 plus peradventure associated proteins such as MAGP-1 (microfibril-associated glycoprotein-1)....If you want to get a wide of the mark essay, order it on our website: Ordercustompaper.com
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