Fibrous Proteins: Difference between revisions

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Karl Oberholser, Israel Hanukoglu, Michal Harel

Revision as of 13:45, 2 February 2014 view source Israel Hanukoglu (talk \| contribs) 113 edits Added link to page on keratins ← Older edit		Latest revision as of 13:01, 2 February 2016 view source Michal Harel (talk \| contribs) 31,761 edits No edit summary
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	<Structure load='3mtu.pdb' size='~~500~~' frame='true' align='right' caption='Tropomyosin' scene='Fibrous_Proteins/Protomyosin/1' />		<Structure load='3mtu.pdb' size='350' frame='true' align='right' caption='Tropomyosin α-1 chain (PDB code [[3mtu]])' scene='Fibrous_Proteins/Protomyosin/1' />
	Fibrous proteins are made up of polypeptide chains that are elongated and fibrous in nature or have a sheet like structure. These fibers and sheets are mechanically strong and are water insoluble. They are often structural proteins that provide strenth and protection to cells and tissue. Two [[Coiled coil\|coiled coil]] chains of tropomyosin are shown in the scene to the right. The α-[[keratins]] are fibrous proteins involved in the structure of hair, finger nails and horns, and their [[Secondary structure\|secondary structure]] is the [[Helices in Proteins\|α-helix]] with a higher level of structure being the [[Coiled coil\|coiled coil]]. Fibroins (a β-keratin) are fibrous proteins making up silk and spider webs, and their secodary structure is [[Sheets in Proteins\|β-sheets]]. Collagen is an abundant fibrous protein in vertebrate animals being found in tendons, cartilage and bone, and it has a unique [[Collagen\|structure]]. Elastin is an important component of tissues, such as ligaments and skin, and is highly elastic. Its polymeric fibers are made from monomeric units having no secondary structure but having a flexible, disordered structure. The disordered structure permits it to stretch in two dimensions.		Fibrous proteins are made up of polypeptide chains that are elongated and fibrous in nature or have a sheet like structure. These fibers and sheets are mechanically strong and are water insoluble. They are often structural proteins that provide strenth and protection to cells and tissue. Two [[Coiled coil\|coiled coil]] chains of tropomyosin are shown in the scene to the right. The α-[[keratins]] are fibrous proteins involved in the structure of hair, finger nails and horns, and their [[Secondary structure\|secondary structure]] is the [[Helices in Proteins\|α-helix]] with a higher level of structure being the [[Coiled coil\|coiled coil]]. Fibroins (a β-keratin) are fibrous proteins making up silk and spider webs, and their secodary structure is [[Sheets in Proteins\|β-sheets]]. Collagen is an abundant fibrous protein in vertebrate animals being found in tendons, cartilage and bone, and it has a unique [[Collagen\|structure]]. Elastin is an important component of tissues, such as ligaments and skin, and is highly elastic. Its polymeric fibers are made from monomeric units having no secondary structure but having a flexible, disordered structure. The disordered structure permits it to stretch in two dimensions.