Unveiling the genetic blueprint of a desert scorpion: A chromosome-level genome of Hadrurus arizonensis provides the first reference for Parvorder Iurida

Bryant, M. J.; Coello, A. M.; Glendening, A. M.; Hilliman, S. A.; Jara, C. F.; Pring, S. S.; Rivera, A. R.; Santiago Membreno, J.; Nigro, L.; Pauloski, N.; Graham, M. R.; King, T.; Jockusch, E. L.; O'Neill, R. J.; Wegrzyn, J. L.; Santibanez-Lopez, C. E.; Webster, C. N.

doi:10.1101/2024.03.22.586284

bioRxiv · 10.1101/2024.03.22.586284

Unveiling the genetic blueprint of a desert scorpion: A chromosome-level genome of Hadrurus arizonensis provides the first reference for Parvorder Iurida

Bryant, M. J.·Coello, A. M.·Glendening, A. M.·Hilliman, S. A.·Jara, C. F.·Pring, S. S.·Rivera, A. R.·Santiago Membreno, J.·Nigro, L.·Pauloski, N.·Graham, M. R.·King, T.·Jockusch, E. L.·O'Neill, R. J.·Wegrzyn, J. L.·Santibanez-Lopez, C. E.·Webster, C. N.

View original source ↗Export metadata ↓

Abstract

Over 400 million years old, scorpions represent an ancient group of arachnids and one of the first animals to adapt to life on land. Presently, the lack of available genomes within scorpions hinders research on their evolution. This study leverages ultra-long nanopore sequencing and Pore-C to generate the first chromosome level assembly and annotation for the desert hairy scorpion, Hadrurus arizonensis. The assembled genome is 2.23 Gb in size with an N50 of 280 Mb. Pore-C scaffolding re-oriented 99.6% of bases into nine chromosomes and BUSCO identified 998 (98.6%) complete arthropod single copy orthologs. Repetitive elements represent 54.69% of the assembled bases, including 872,874 (29.39%) LINE elements. A total of 18,996 protein-coding genes and 75,256 transcripts were predicted, and extracted protein sequences yielded a BUSCO score of 97.2%. This is the first genome assembled and annotated within the family Hadruridae, representing a crucial resource for closing gaps in genomic knowledge of scorpions, resolving arachnid phylogeny, and advancing studies in comparative and functional genomics. SignificanceGenomic resources for the study of arachnids are limited. To date, only four scorpion genomes have been published; none of these are chromosome-level assemblies, and all four belong to a single family, Buthidae. In this study, we assembled the first chromosome-level, annotated genome for a non-buthid species (Hadrurus arizonensis). This high quality reference will provide a critical resource for comparative and functional genomics and contribute to the understanding of arachnid evolution.

Explore related subjects

genomics Preprint

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

Bryant, M. J., Coello, A. M., Glendening, A. M., Hilliman, S. A., Jara, C. F., Pring, S. S., Rivera, A. R., Santiago Membreno, J., Nigro, L., Pauloski, N., Graham, M. R., King, T., Jockusch, E. L., O'Neill, R. J., Wegrzyn, J. L., Santibanez-Lopez, C. E., Webster, C. N.. 2024-03-25. Unveiling the genetic blueprint of a desert scorpion: A chromosome-level genome of Hadrurus arizonensis provides the first reference for Parvorder Iurida. https://doi.org/10.1101/2024.03.22.586284

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related preprints

bioRxiv2026

PfPHAST: Plasmodium falciparum Public Health Amplicon Sequencing Tool, a Streamlined Panel for Malaria Genomic Surveillance

Genomic tools can support malaria control policy through surveillance of Plasmodium falciparum populations, tracking antimalarial drug resistance, pfhrp2/3 deletions that compromise rapid diagnostic tests, and selection at the circumsporozoite protein (PfCSP) vaccine target, as well as through molecular correction of therapeutic efficacy studies (TES). Multiplex Amplicons for Drug, Diagnostic, Diversity, and Differentiation Haplotypes using Targeted Resequencing (MAD4HatTeR), a comprehensive amplicon sequencing panel covering up to 276 targets, supports these applications but is tailored to research rather than routine programmatic use. We developed P. falciparum Public Health Amplicon Sequencing Tool (PfPHAST), a 56-target derivative of MAD4HatTeR spanning drug resistance loci, pfhrp2/3 deletion, PfCSP genotyping, non-falciparum species identification, and 20 high-heterozygosity microhaplotype loci for TES classification. We compared PfPHAST and MAD4HatTeR using laboratory strain controls, including two-strain dilution series and a five-strain mixture, across parasite densities of 100 to 10,000 parasites/L. At matched per-target depth, PfPHAST achieved a higher quality-control pass rate than MAD4HatTeR (94.4% versus 90.0%) and distributed reads more evenly across targets. The panels showed comparable recall and precision for drug resistance codons and microhaplotypes, reaching near-complete recall above 40% within-sample allele frequency (WSAF) at all densities, with reduced sensitivity for minor alleles below 10% WSAF at low parasite density in both panels. Observed and expected WSAF correlated strongly for both panels, and both resolved a five-strain polyclonal mixture, including a 5% minor strain. By concentrating sequencing capacity on targets of greatest programmatic relevance, PfPHAST offers a scalable, lower-cost alternative to comprehensive research panels without sacrificing performance on shared targets, complementing MAD4HatTeR for routine molecular malaria surveillance.

genomics↗

bioRxiv2026

Structural variation in repeat elements is widespread in normal human tissues and in tumorigenesis

Somatic mosaicism contributes to genomic variation, yet postzygotic structural variants remain under-characterized. We performed long- and short-read WGS from multiple individuals (n=47 normal tissues; n=168 samples) and identified mosaic structural variants in all individuals and germ layers, impacting a median 285.2 kb/genome. Nearly half of breakpoints were independently validated, with tissue distributions reflecting both early and late developmental origins. Most mosaic variants were repeat-mediated and 8.3% overlapped functional elements, an enrichment compared to germline variants. To extend these analyses in samples where long-read sequencing is infeasible, we measured repeat alterations from short-read sequencing, recapitulating mosaic tissue-specific differences. We characterized tumor- and tissue- specific variation in repeats across 15 cancer types and found tumor-related repeat variation to be similar in scale to that of normal mosaic variation. Tracking repeat changes in cell-free DNA provided a noninvasive approach for tumor monitoring. Our analyses revealed widespread repeat-driven structural variation in health and disease.

genomics↗

bioRxiv2026

RNA isoform-resolved multiplexed sequencing with bioorthogonal barcoding

RNA isoform dysregulation drives disease pathogenesis and is the target of FDA-approved splice-switching therapeutics. However, multiplexed sequencing methods discard splice junction information because only 3' termini are barcoded and counted. Here, we repurpose acylation and click chemistries to conjugate bioorthogonal barcodes (bobcodes) directly onto multiple internal positions along cellular RNAs. Bobcoded RNAs from multiple samples are pooled for multiplexed cDNA synthesis, during which reverse transcriptase switches from each RNA template onto its tethered bobcode with greater than 99% accuracy in species mixing experiments. Bobcode attachment intervals set cDNA insert sizes without a library fragmentation step, and priming with poly(dT) or random hexamers selects between 3'-end counting and full-length isoform capture. A bioorthogonal barcode-sequencing (BOB-seq v0.1) drug screen identifies transcriptome-wide on- and off-target RNA splicing effects and outperforms existing multiplexing RNA sequencing methods in workflow simplicity, sample-to-sample variability, and barcoding accuracy. Bobcodes add isoform resolution to scalable multiplexed RNA sequencing.

genomics↗