The ubiquitin-like protein Hub1/UBL-5 functions in pre-mRNA splicing in Caenorhabditis elegans

Kiran Kumar Kolathur, Pallavi Sharma, Nagesh Y. Kadam, Navneet Shahi, Ane Nishitha, Kavita Babu, Shravan Kumar Mishra

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1 Citation (Scopus)


The ubiquitin-like protein Hub1/UBL-5 associates with proteins non-covalently. Hub1 promotes alternative splicing and splicing of precursor mRNAs with weak introns in yeast and mammalian cells; however, its splicing function has remained elusive in multicellular organisms. Here, we demonstrate the splicing function of Hub1/UBL-5 in the free-living nematode Caenorhabditis elegans. Hub1/UBL-5 binds to the HIND-containing splicing factors Snu66/SART-1 and PRP-38 and associates with other spliceosomal proteins. C. elegans hub1/ubl-5 mutants die at the Larval 3 stage and show splicing defects for selected targets, similar to the mutants in yeast and mammalian cells. UBL-5 complemented growth and splicing defects in Schizosaccharomyces pombe hub1 mutants, confirming its functional conservation. Thus, UBL-5 is important for C. elegans development and plays a conserved pre-mRNA splicing function.

Original languageEnglish
Pages (from-to)448-457
Number of pages10
JournalFEBS Letters
Issue number3
Publication statusPublished - 02-2023

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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