Most fungi display a mixed mating system with both asexual and sexual reproduction.The timing of the two modes of reproduction must be carefully coordinated through signal perception and coordination in the cell along...Most fungi display a mixed mating system with both asexual and sexual reproduction.The timing of the two modes of reproduction must be carefully coordinated through signal perception and coordination in the cell along with chromatin modification.Here,we investigated coordination of reproductive output by investigating the function of the histone chaper-one anti-silencing factor 1(ASF1)in a fungal species amenable to characterization of both asexual and sexual reproduction.We used knockout approach to show that SeASF1 influenced asexual and sexual reproduction in Stemphylium eturmiunum.SeASF1-deleted strains failed to produce pseudothecia,but produce abnormal conidia and showed an irregular distribution of nuclei in mycelium.Transcriptome sequencing was then used to identify genes with altered expression in the SeASF1-deleted strains.The transcriptional expression of the identified SeDJ-1 was strongly regulated by SeASF1.The interaction of SeDJ-1 and SeASF1 was confirmed using Y2H,Co-IP,and pull-down.Due to some components of phosphatidylinositol 3-kinase/protein kinase B(PI3K/AKT)signaling pathway were known to interact with DJ-1 in mammals,we verified SePI3K,an element of PI3K/AKT signaling pathway in S.eturmiunum,was directly linked to SeDJ-1 and then these two proteins were defined as a coordinator of reproduction.However,knockout of SeDJ-1 or SePI3K altered the asexual and sexual repro-duction,but SePI3K recovered the asexual and sexual development of∆Sedj-1.The SeDJ-1-M6 segment of SeDJ-1 was essential for its interaction with SePI3K and played a critical role in restoring sexual reproduction in the∆Sepi3k,providing a deep understanding of the regulatory mechanism of SeDJ-1 in S.eturmiunum development.Summarily,SeASF1 is able to trigger SeDJ-1 and SeDJ-1can also activate SePI3K,which is orchestrally involved in asexual and sexual reproduction in S.eturmiunum.All these results reveal that SeASF1 manipulates asexual and sexual reproduction in S.eturmiunum by SeDJ-1 perception of PI3K/AKT signaling pathway.These data highlight the deep similarities in coordinating asexual and sexual processes in both fungi and eukaryotes in general.展开更多
The increasing number of new fungal species described from all over the world along with the use of genetics to define taxa,has dramatically changed the classification system of early-diverging fungi over the past sev...The increasing number of new fungal species described from all over the world along with the use of genetics to define taxa,has dramatically changed the classification system of early-diverging fungi over the past several decades.The number of phyla established for non-Dikarya fungi has increased from 2 to 17.However,to date,both the classification and phylogeny of the basal fungi are still unresolved.In this article,we review the recent taxonomy of the basal fungi and re-evaluate the relationships among early-diverging lineages of fungal phyla.We also provide information on the ecology and distribu-tion in Mucoromycota and highlight the impact of chytrids on amphibian populations.Species concepts in Chytridiomycota,Aphelidiomycota,Rozellomycota,Neocallimastigomycota are discussed in this paper.To preserve the current application of the genus Nephridiophaga(Chytridiomycota:Nephridiophagales),a new type species,Nephridiophaga blattellae,is proposed.展开更多
基金Funding was provided by National Natural Science Foundation of China(Grant nos.31230001,U200220015).
文摘Most fungi display a mixed mating system with both asexual and sexual reproduction.The timing of the two modes of reproduction must be carefully coordinated through signal perception and coordination in the cell along with chromatin modification.Here,we investigated coordination of reproductive output by investigating the function of the histone chaper-one anti-silencing factor 1(ASF1)in a fungal species amenable to characterization of both asexual and sexual reproduction.We used knockout approach to show that SeASF1 influenced asexual and sexual reproduction in Stemphylium eturmiunum.SeASF1-deleted strains failed to produce pseudothecia,but produce abnormal conidia and showed an irregular distribution of nuclei in mycelium.Transcriptome sequencing was then used to identify genes with altered expression in the SeASF1-deleted strains.The transcriptional expression of the identified SeDJ-1 was strongly regulated by SeASF1.The interaction of SeDJ-1 and SeASF1 was confirmed using Y2H,Co-IP,and pull-down.Due to some components of phosphatidylinositol 3-kinase/protein kinase B(PI3K/AKT)signaling pathway were known to interact with DJ-1 in mammals,we verified SePI3K,an element of PI3K/AKT signaling pathway in S.eturmiunum,was directly linked to SeDJ-1 and then these two proteins were defined as a coordinator of reproduction.However,knockout of SeDJ-1 or SePI3K altered the asexual and sexual repro-duction,but SePI3K recovered the asexual and sexual development of∆Sedj-1.The SeDJ-1-M6 segment of SeDJ-1 was essential for its interaction with SePI3K and played a critical role in restoring sexual reproduction in the∆Sepi3k,providing a deep understanding of the regulatory mechanism of SeDJ-1 in S.eturmiunum development.Summarily,SeASF1 is able to trigger SeDJ-1 and SeDJ-1can also activate SePI3K,which is orchestrally involved in asexual and sexual reproduction in S.eturmiunum.All these results reveal that SeASF1 manipulates asexual and sexual reproduction in S.eturmiunum by SeDJ-1 perception of PI3K/AKT signaling pathway.These data highlight the deep similarities in coordinating asexual and sexual processes in both fungi and eukaryotes in general.
基金HBL was supported by the Graduate Program for the Undiscovered Taxa of Korea(NIBR202130202)by the Project on Survey and Discovery of Indigenous Fungal Species of Korea funded by NIBR+8 种基金by the Project on Discovery of Fungi from Freshwater and Collection of Fungarium funded by NNIBR of the Ministry of Environment(MOE)of the Republic of KoreaTYJ and DRS were supported by the US National Science Foundation Grants tDBI-1756202,DBI-1910720,and DEB-1929738GHJ thank FAPESP(2018/24915-1 and 2019/17237-0)KS was supported by a Grant-in-Aid for JSPS Overseas Research Fellowship from the Japan Society for the Promotion of ScienceBW was supported by grants from the National Research Foundation of Korea funded by the Ministry of Education(2015R1D1A01057282)the Ministry of Science,ICT,and Future Planning(2018R1A2B6006833)of the Republic of KoreaALS was supported by the Fundação de AmparoàCiência do Estado de Perbambuco and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior(FACEPE/CNPq-APQ-0842-2.12/14.)We thank the National Council for Scientific and Technological Development(CNPq)for the research scholarship Granted to ALS.RR and JFHS were supported by Grants of the German Research Foundation(DFG,RA850/6-1 Project No.397619173 and STR1349/2-1 Project No.432453260,respectively)KV was supported by the German Research Foundation(DFG)through the Collaborative Research Center/Transregio FungiNet 124‘Pathogenic fungi and their human host:Networks of Interaction’,DFG Project Number 210879364,Project A6.
文摘The increasing number of new fungal species described from all over the world along with the use of genetics to define taxa,has dramatically changed the classification system of early-diverging fungi over the past several decades.The number of phyla established for non-Dikarya fungi has increased from 2 to 17.However,to date,both the classification and phylogeny of the basal fungi are still unresolved.In this article,we review the recent taxonomy of the basal fungi and re-evaluate the relationships among early-diverging lineages of fungal phyla.We also provide information on the ecology and distribu-tion in Mucoromycota and highlight the impact of chytrids on amphibian populations.Species concepts in Chytridiomycota,Aphelidiomycota,Rozellomycota,Neocallimastigomycota are discussed in this paper.To preserve the current application of the genus Nephridiophaga(Chytridiomycota:Nephridiophagales),a new type species,Nephridiophaga blattellae,is proposed.