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Novel transcripts in the maxillary venom glands of advanced snakes

Fry, Bryan G., Scheib, Holger, Junqueira de Azevedo, Inacio de L.M., Silva, Debora Andrade and Casewell, Nicholas ORCID: (2012) 'Novel transcripts in the maxillary venom glands of advanced snakes'. Toxicon, Vol 59, Issue 7-8, pp. 696-708.

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Venom proteins are added to reptile venoms through duplication of a body protein gene, with the duplicate tissue-specifically expressed in the venom gland. Molecular scaffolds are recruited from a wide range of tissues and with a similar level of diversity of ancestral activity. Transcriptome studies have proven an effective and efficient tool for the discovery of novel toxin scaffolds. In this study, we applied venom gland transcriptomics to a wide taxonomical diversity of advanced snakes and recovered transcripts encoding three novel protein scaffold types lacking sequence homology to any previously characterised snake toxin type: lipocalin, phospholipase A2 (type IIE) and vitelline membrane outer layer protein. In addition, the first snake maxillary venom gland isoforms were sequenced of ribonuclease, which was only recently sequenced from lizard mandibular venom glands. Further, novel isoforms were also recovered for the only recently characterised veficolin toxin class also shared between lizard and snake venoms. The additional complexity of snake venoms has important implications not only for understanding their molecular evolution, but also reinforces the tremendous importance of venoms as a diverse bio-resource.

Item Type: Article
Subjects: QU Biochemistry > Proteins. Amino Acids. Peptides > QU 58.5 DNA.
QV Pharmacology > Toxicology > General Toxicology > QV 600 General works
WD Disorders of Systemic, Metabolic or Environmental Origin, etc > Animal Poisons > WD 410 Reptiles
Faculty: Department: Groups (2002 - 2012) > Molecular & Biochemical Parasitology Group
Digital Object Identifer (DOI):
Depositing User: Lynn Roberts-Maloney
Date Deposited: 09 Jan 2015 11:44
Last Modified: 06 Feb 2018 13:08


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