Erwinia amylovora phage vB_EamM_Y3 represents another lineage of hairy Myoviridae

Research in Microbiology
Colin ButtimerAidan Coffey

Abstract

To date, a small number of jumbo myoviruses have been reported to possess atypical whisker-like structures along the surface of their contractile tails. Erwinia amylovora phage vB_EamM_Y3 is another example. It possesses a genome of 261,365 kbp with 333 predicted ORFs. Using a combination of BLASTP, Interproscan and HHpred, about 21% of its putative proteins could be assigned functions involved in nucleotide metabolism, DNA replication, virion structure and cell wall degradation. The phage was found to have a signal-arrest-release (SAR) endolysin (Y3_301) possessing a soluble lytic transglycosylase domain. Like other SAR endolysins, inducible expression of Y3_301 caused Escherichia coli lysis, which is dependent on the presence of an N-terminal signal sequence. Phylogenetic analysis showed that its closest relatives are other jumbo phages including Pseudomonas aeruginosa phage PaBG and P. putida phage Lu11, sharing 105 and 87 homologous proteins respectively. Like these phages, Y3 also shares a distant relationship to Ralstonia solanacearum phage ΦRSL1 (sharing 55 homologous proteins). As these phages are unrelated to the Rak2-like group of hairy phages, Y3 along with Lu11 represent a second lineage of hairy myoviruses.

Citations

Dec 12, 2018·Microbiology Resource Announcements·Ruchira SharmaJulianne H Grose
Apr 23, 2020·FEMS Microbiology Letters·Natalya V BesarabAnatoly N Evtushenkov
Jul 9, 2020·Viruses·Peter EvseevKonstantin Miroshnikov
Jan 28, 2021·Viruses·Victor KrylovVitaly Zverev
Apr 4, 2021·Microorganisms·Emilija ŽukauskienėEugenijus Šimoliūnas
Jul 25, 2021·International Journal of Molecular Sciences·Monika ŠimoliūnienėEugenijus Šimoliūnas

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