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Zurovec M, Yonemura N, Kludkiewicz B, Sehnal F, Kodrik D, Vieira LC, Kucerova L, Strnad H, Konik P, Sehadova H. Sericin Composition in the Silk of Antheraea yamamai. Biomacromolecules 2016; 17:1776-87. [PMID: 27049111 DOI: 10.1021/acs.biomac.6b00189] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The silks produced by caterpillars consist of fibroin proteins that form two core filaments, and sericin proteins that seal filaments into a fiber and conglutinate fibers in the cocoon. Sericin genes are well-known in Bombyx mori (Bombycidae) but have received little attention in other insects. This paper shows that Antheraea yamamai (Saturniidae) contains five sericin genes very different from the three sericin genes of B. mori. In spite of differences, all known sericins are characterized by short exons 1 and 2 (out of 3-12 exons), expression in the middle silk gland section, presence of repeats with high contents of Ser and charged amino acid residues, and secretion as a sticky silk component soluble in hot water. The B. mori sericins represent tentative phylogenetic lineages (I) BmSer1 and orthologs in Saturniidae, (II) BmSer2, and (III) BmSer3 and related sericins of Saturniidae and of the pyralid Galleria mellonella. The lineage (IV) seems to be limited to Saturniidae. Concerted evolution of the sericin genes was apparently associated with gene amplifications as well as gene loses. Differences in the silk fiber morphology indicate that the cocktail of sericins linking the filaments and coating the fiber is modified during spinning. Silks are composite biomaterials of conserved function in spite of great diversity of their composition.
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Affiliation(s)
- Michal Zurovec
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic.,Faculty of Science, University of South Bohemia , Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Naoyuki Yonemura
- National Institute of Agrobiological Sciences Tsukuba , Ibaraki 305-8634, Japan
| | - Barbara Kludkiewicz
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - František Sehnal
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Dalibor Kodrik
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic.,Faculty of Science, University of South Bohemia , Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Ligia Cota Vieira
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Lucie Kucerova
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Hynek Strnad
- Institute of Molecular Genetics ASCR , Vídeňská 1083, 142 20 Praha 4, Czech Republic
| | - Peter Konik
- Faculty of Science, University of South Bohemia , Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Hana Sehadova
- Entomological Institute, Biology Centre ASCR , Branišovská 31, 370 05 České Budějovice, Czech Republic
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Zabelina V, Klymenko V, Tamura T, Doroshenko K, Liang H, Sezutsu H, Sehnal F. Genome engineering and parthenocloning in the silkworm, Bombyx mori. J Biosci 2015; 40:645-55. [DOI: 10.1007/s12038-015-9548-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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