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Plos One : Full-length Minor Ampullate Spidroin Gene Sequence, Volume 7

By Uversky, Vladimir N.

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Book Id: WPLBN0003937818
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Full-length Minor Ampullate Spidroin Gene Sequence, Volume 7  
Author: Uversky, Vladimir N.
Volume: Volume 7
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
Publication Date:
Publisher: Plos

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Uversky, V. N. (n.d.). Plos One : Full-length Minor Ampullate Spidroin Gene Sequence, Volume 7. Retrieved from http://www.worldlibrary.org/


Description
Description : Spider silk includes seven protein based fibers and glue-like substances produced by glands in the spider’s abdomen. Minor ampullate silk is used to make the auxiliary spiral of the orb-web and also for wrapping prey, has a high tensile strength and does not supercontract in water. So far, only partial cDNA sequences have been obtained for minor ampullate spidroins (MiSps). Here we describe the first MiSp full-length gene sequence from the spider species Araneus ventricosus, using a multidimensional PCR approach. Comparative analysis of the sequence reveals regulatory elements, as well as unique spidroin gene and protein architecture including the presence of an unusually large intron. The spliced full-length transcript of MiSp gene is 5440 bp in size and encodes 1766 amino acid residues organized into conserved nonrepetitive N- and Cterminal domains and a central predominantly repetitive region composed of four units that are iterated in a non regular manner. The repeats are more conserved within A. ventricosus MiSp than compared to repeats from homologous proteins, and are interrupted by two nonrepetitive spacer regions, which have 100% identity even at the nucleotide level.

 

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