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Kinetic analysis of effects of temperature and time on the regulation of venom expression in Bungarus multicinctus.

Abstract：

:Venom gland is a highly efficient venom production system to maintain their predatory arsenal. Venom toxins mRNA has been shown to increase abruptly in snake after venom expenditure, while the dynamics of venom accumulation during synthesis are poorly understood. Here, PacBio long-read sequencing, Illumina RNA sequencing (RNA-seq), and label-free proteome quantification were used to investigate the composition landscape and time- and temperature-dependent dynamics changes of the Bungarus multicinctus venom gland system. Transcriptome data (19.5223 Gb) from six adult B. multicinctus tissues were sequenced using PacBio RS II to generate a reference assembly, and average 7.28 Gb of clean RNA-seq data was obtained from venom glands by Illumina sequencing. Differentially expressed genes (DEGs) mainly were protein processing rather than venom toxins. Post-translational modifications provided the evidence of the significantly different proportions of toxins in the venom proteome with the changing of replenishment time and temperature, but constant of venom toxins mRNA in the venom gland transcriptome. Dynamic of toxins and genes involved in venom gland contraction suggesting the formation of the mature venom gland system would take at least 9 days. In addition, 59 toxin processing genes were identified, peptidylprolyl isomerase B of which underwent positive selection in Toxicofera. These results provide a reference for determining the extraction time of venom, production of polyclonal and monoclonal antibody for precise treatment plans of venomous snakebites, and construction of an in vitro synthesis system for snake venom protein.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yin X,Guo S,Gao J,Luo L,Liao X,Li M,Su H,Huang Z,Xu J,Pei J,Chen S

doi

10.1038/s41598-020-70565-2

subject

Has Abstract

pub_date

2020-08-24 00:00:00

pages

14142

issue

1

issn

2045-2322

pii

10.1038/s41598-020-70565-2

journal_volume

10

pub_type

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