Identification and comparative analysis of the epidermal differentiation complex in snakes.

Abstract:

:The epidermis of snakes efficiently protects against dehydration and mechanical stress. However, only few proteins of the epidermal barrier to the environment have so far been identified in snakes. Here, we determined the organization of the Epidermal Differentiation Complex (EDC), a cluster of genes encoding protein constituents of cornified epidermal structures, in snakes and compared it to the EDCs of other squamates and non-squamate reptiles. The EDC of snakes displays shared synteny with that of the green anole lizard, including the presence of a cluster of corneous beta-protein (CBP)/beta-keratin genes. We found that a unique CBP comprising 4 putative beta-sheets and multiple cysteine-rich EDC proteins are conserved in all snakes and other squamates investigated. Comparative genomics of squamates suggests that the evolution of snakes was associated with a gene duplication generating two isoforms of the S100 fused-type protein, scaffoldin, the origin of distinct snake-specific EDC genes, and the loss of other genes that were present in the EDC of the last common ancestor of snakes and lizards. Taken together, our results provide new insights into the evolution of the skin in squamates and a basis for the characterization of the molecular composition of the epidermis in snakes.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Holthaus KB,Mlitz V,Strasser B,Tschachler E,Alibardi L,Eckhart L

doi

10.1038/srep45338

subject

Has Abstract

pub_date

2017-03-27 00:00:00

pages

45338

issn

2045-2322

pii

srep45338

journal_volume

7

pub_type

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