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The bagworm genome reveals a unique fibroin gene that provides high tensile strength.

ABSTRACT: Arthropod silk is known as a versatile tool, and its variability makes it an attractive biomaterial. Eumeta variegata is a bagworm moth (Lepidoptera, Psychidae) that uses silk throughout all life stages. Notably, the bagworm-specific uses of silk include larval development in a bag coated with silk and plant materials and the use of silk attachments to hang pupae. An understanding at the molecular level of bagworm silk, which enables such unique purposes, is an opportunity to expand the possibilities for artificial biomaterial design. However, very little is known about the bagworm fibroin gene and the mechanical properties of bagworm silk. Here, we report the bagworm genome, including a silk fibroin gene. The genome is approximately 700?Mbp in size, and the newly found fibroin gene has a unique repetitive motif. Furthermore, a mechanical property test demonstrates a phylogenetic relationship between the unique motif and tensile strength of bagworm silk.

SUBMITTER: Kono N

PROVIDER: S-EPMC6488591 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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The bagworm genome reveals a unique fibroin gene that provides high tensile strength.

Kono Nobuaki N Nakamura Hiroyuki H Ohtoshi Rintaro R Tomita Masaru M Numata Keiji K Arakawa Kazuharu K

Communications biology 20190429

Arthropod silk is known as a versatile tool, and its variability makes it an attractive biomaterial. <i>Eumeta variegata</i> is a bagworm moth (Lepidoptera, Psychidae) that uses silk throughout all life stages. Notably, the bagworm-specific uses of silk include larval development in a bag coated with silk and plant materials and the use of silk attachments to hang pupae. An understanding at the molecular level of bagworm silk, which enables such unique purposes, is an opportunity to expand the p ...[more]

PMID: 31044173

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The balance of crystalline and amorphous regions in the fibroin structure underpins the tensile strength of bagworm silk.

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