Working with ciliate and other microbial eukaryotic genomic and transcriptomic data requires bioinformatic expertise to identify orthologs and paralogs. To overcome this challenge, as a postdoc at Smith College, I developed a workflow that can be adapted for phylogenomic analyses based on single-cell RNA sequencing of uncultivable microbial eukaryotes
https://github.com/shahed30/Phylogenomic-pipeline-for-microbial-eukaryotes
Shazib, S. U. A., Ahsan, R., Leleu, M., McManus, G. B., Katz, L. A., & Santoferrara, L. F. (2025). Phylogenomic workflow for uncultivable microbial eukaryotes using single-cell RNA sequencing− A case study with planktonic ciliates (Ciliophora, Oligotrichea). Molecular Phylogenetics and Evolution, 108239. (weblink).
GC3 content analyses using codon usage bias plots for 33 Oligotrichea transcriptomes before (gray color) and after (red color) data curation
Ortholog (single-copy genes) and paralog (multi-copy genes) assignment from a single gene tree (SGT)
A workflow for species delimitation using a multispecies coalescent approach and scRNA-seq data
We also developed workflows
1. To define species boundaries among microbial eukaryotes, specifically focusing on cryptic species at the molecular level using the Morphological Species Concept (MSC) approach and single-cell RNA sequencing (scRNA-seq) data. (Part A and B)
2. To reconstruct nuclear ribosomal RNA gene sequences from transcriptome data using a read mapping approach. Additionally, we compare various mapping methods to confirm the reconstruction of reliable contigs. (Part C) - SeqToDNA
This is the pipeline used for the reconstruction of rDNA and target contigs from high-throughput sequencing data using reference sequences.
Workflow avilabale here - https://github.com/shahed30/SeqToDNA
Shazib, S. U. A**., Cote-L'Heureux, A., Ahsan, R., Muñoz-Gómez, S. A., Lee, J., Katz, L. A., & Shin, M. K. (2025). Phylogeny and species delimitation of ciliates in the genus Spirostomum (class Heterotrichea) using single-cell transcriptomes. BMC Ecology and Evolution, 25(1), 17. (weblink).