Heloderma suspectum
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA376377 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Heloderma suspectum cinctum Transcriptome or Gene expression
| PRJNA189581 | ENA
Project description:Heloderma suspectum strain:Not applicable Genome sequencing
| PRJNA1064225 | ENA
Project description:The archetypical venomous lizard species are the helodermatids, the Gila Monster (Heloderma suspectum) and the Beaded Lizards (Heloderma horridum). In the present study, the gila monster venom proteome was characterized using 2D-gel electrophoresis and tandem mass spectrometry-based de novo peptide sequencing followed by protein identification based on sequence homology. A total of 39 different proteins were identified out of the 58 selected spots that represent the major constituents of venom. Of these proteins, 19 have not previously been identified in helodermatid venom. The data showed that helodermatid venom is complex and that this complexity is caused by genetic isoforms and post-translational modifications including proteolytic processing. In addition, the venom proteome analysis revealed that the major constituents of the gila monster venom are kallikrein-like serine proteinases (EC 3.4.21) and phospholipase A2 (type III) enzymes (EC 3.1.1.4). A neuroendocrine convertase 1 homolog that most likely converts the proforms of the previously identified bioactive exendins into the mature and active forms was identified suggesting that these peptide toxins are secreted as proforms that are activated by proteolytic cleavage following secretion as opposed to being activated intracellularly. The presented global protein identification-analysis provides the first overview of the helodermatid venom composition.
2015-01-26 | PXD001343 | Pride
Project description:The data presented here is related to the research article entitled "Characterization of the gila monster (Heloderma suspectum suspectum) venom proteome" by Sanggaard et al. in Journal of Proteomics [1]. The gila monster venom was collected, analyzed by 2D-gel electrophoresis and after Coomassie-Brilliant Blue staining the major spots were excised, subjected to in-gel trypsin digestion, and analyzed by LC-MS/MS. Subsequently, the venom proteins were identified based on de novo sequencing and homology searching. The mass spectrometry proteomics data have been deposited to the ProteomeXchange (dataset identifier PXD0001343), and in the present article we present an overview of the identified proteins. Protein identification failed for three of the selected spots, with the method described above. Instead, an iterative process, based on de novo sequencing, was employed.
| S-EPMC4510068 | biostudies-literature
Project description:The timing of reproductive events (e.g. oviposition and hatching) to coincide with favourable seasonal conditions is critical for successful reproduction. However, developmental time may not match the duration between the optimal time for oviposition and the optimal time for hatchling survival. Thus, strategies that alter the time between oviposition and hatchling emergence can be highly advantageous. Arrested development and the resulting extension of the duration between oviposition and hatching has been widely documented across oviparous amniotes, but nest overwintering by hatchlings has only been documented in aquatic chelonians that live where winters are quite cold. Herein, we present a compilation of evidence regarding reproductive phenology by hatchlings of the Gila monster (Heloderma suspectum), a lizard inhabiting the Sonoran Desert of North America. Our data demonstrate that (i) Gila monster hatchlings from eggs oviposited in July do not emerge from their nests until late spring or summer of the following year, yet (ii) Gila monster eggs artificially incubated at field-relevant temperatures hatch in 4-5 months. Furthermore, we describe a fortuitous excavation of a hatching Gila monster nest in late October, which coincides with the artificial incubation results. Together, these results provide strong support for the existence of overwintering in the nest by a lizard, and suggest that this reproductive strategy should be explored in a broader array of taxa.
| S-EPMC5998102 | biostudies-literature
Project description:A wide variety of sex determination systems exist among squamate reptiles. They can therefore serve as an important model for studies of evolutionary transitions among particular sex determination systems. However, we still have only a limited knowledge of sex determination in certain important lineages of squamates. In this respect, one of the most understudied groups is the family Helodermatidae (Anguimorpha) encompassing the only two venomous species of lizards which are potentially lethal to human beings. We uncovered homomorphic ZZ/ZW sex chromosomes in the Gila monster (Heloderma suspectum) with a highly heterochromatic W chromosome. The sex chromosomes are morphologically similar to the ZZ/ZW sex chromosomes of monitor lizards (Varanidae). If the sex chromosomes of helodermatids and varanids are homologous, female heterogamety may be ancestral for the whole Anguimorpha group. Moreover, we found that the karyotype of the Gila monster consists of 2n = 36 chromosomes (14 larger metacentric chromosomes and 22 acrocentric microchromosomes). 2n = 36 is the widely distributed chromosomal number among squamates. In his pioneering works representing the only previous cytogenetic examination of the family Helodermatidae, Matthey reported the karyotype as 2n = 38 and suggested a different chromosomal morphology for this species. We believe that this was probably erroneously. We also discovered a strong accumulation of telomeric sequences on several pairs of microchromosomes in the Gila monster, which is a trait documented relatively rarely in vertebrates. These new data fill an important gap in our understanding of the sex determination and karyotype evolution of squamates.
| S-EPMC4131918 | biostudies-literature
Project description:Heloderma horridum horridum commonly known as the scorpion lizard, Mexican scorpion, and beaded lizard, is a venomous reptile native of America. The venom derived from this lizard has potential applications, particularly in treatment of type II diabetes through the peptide Exendin. In this work, H. h. horridum venom was extracted from adult specimens and lyophilized. To characterize the venom, enzymatic assays, including hyaluronidase, phospholipase A2, and proteolytic activity were conducted. A proteomic analysis of the venom was also performed employing bottom-up/shotgun approaches from SDS-PAGE and High pH Reversed-Phase chromatography., besides fractionation of tryptic peptides using a nano-LC-MS/MS. These approaches involved massive sequencing to enhancing the likelihood of detecting an extensive range of venom proteins. The proteins and peptides found in H. h. horridum venom are reviewed according to the classification of the transcriptome previously reported.
2024-08-10 | PXD052417 | Pride