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Sigova EA, Dvorianinova EM, Rozhmina TA, Kudryavtseva LP, Zhernova DA, Kaplun AM, Pavlova VA, Bodrov YV, Arkhipov AA, Borkhert EV, Pushkova EN, Melnikova NV, Dmitriev AA. Complete Annotated Genome Assembly of Flax Pathogen Colletotrichum lini. J Fungi (Basel) 2024; 10:605. [PMID: 39330365 PMCID: PMC11432806 DOI: 10.3390/jof10090605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 08/23/2024] [Accepted: 08/23/2024] [Indexed: 09/28/2024] Open
Abstract
Colletotrichum lini is a fungal pathogen of flax that can cause significant yield and quality losses. In this work, we obtained the first complete annotated genome assembly of the highly virulent C. lini strain #394-2. The nuclear genome consisted of ten core and two accessory chromosomes and had a length of 53.7 Mb. The mitochondrial genome was 39.1 kb. The assembly was obtained by the Canu-Racon ×2-Medaka-Polca algorithm using Oxford Nanopore Technologies and Illumina data. As a result of the annotation with the Illumina RNA-Seq data, 12,449 genes were identified. Potential signaling proteins were tested for effector functions and 550 effector proteins were predicted using EffectorP. The visualization of the effector protein localization revealed that the presence of effector proteins was associated with repeat-rich regions. A comparison of the genomic structure of C. lini with chromosome-level and complete assemblies of the genus Colletotrichum representatives revealed that the genomes of Colletotrichum species differed by the presence of chromosomal rearrangements. The obtained assembly expands the knowledge of the genomic structure of Colletotrichum species and provides the basis for further studies of C. lini, which will help to understand the virulence mechanisms and protect flax from anthracnose.
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Affiliation(s)
- Elizaveta A. Sigova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Ekaterina M. Dvorianinova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Tatiana A. Rozhmina
- Federal Research Center for Bast Fiber Crops, Torzhok 172002, Russia; (T.A.R.); (L.P.K.)
| | | | - Daiana A. Zhernova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Antoniy M. Kaplun
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
- Moscow Institute of Physics and Technology, Moscow 141701, Russia
| | - Valeria A. Pavlova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
- Lomonosov Institute of Fine Chemical Technologies, MIREA—Russian Technological University, Moscow 119571, Russia
| | - Yakov V. Bodrov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
- Lomonosov Institute of Fine Chemical Technologies, MIREA—Russian Technological University, Moscow 119571, Russia
| | - Alexander A. Arkhipov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
- I.M. Sechenov First Moscow State Medical University, Moscow 119991, Russia
| | - Elena V. Borkhert
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Elena N. Pushkova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Nataliya V. Melnikova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Alexey A. Dmitriev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.M.D.); (D.A.Z.); (A.M.K.); (V.A.P.); (Y.V.B.); (A.A.A.); (E.V.B.); (E.N.P.); (N.V.M.)
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Lapalu N, Simon A, Lu A, Plaumann PL, Amselem J, Pigné S, Auger A, Koch C, Dallery JF, O'Connell RJ. Complete genome of the Medicago anthracnose fungus, Colletotrichum destructivum, reveals a mini-chromosome-like region within a core chromosome. Microb Genom 2024; 10:001283. [PMID: 39166978 PMCID: PMC11338638 DOI: 10.1099/mgen.0.001283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 07/22/2024] [Indexed: 08/23/2024] Open
Abstract
Colletotrichum destructivum (Cd) is a phytopathogenic fungus causing significant economic losses on forage legume crops (Medicago and Trifolium species) worldwide. To gain insights into the genetic basis of fungal virulence and host specificity, we sequenced the genome of an isolate from Medicago sativa using long-read (PacBio) technology. The resulting genome assembly has a total length of 51.7 Mb and comprises ten core chromosomes and two accessory chromosomes, all of which were sequenced from telomere to telomere. A total of 15, 631 gene models were predicted, including genes encoding potentially pathogenicity-related proteins such as candidate-secreted effectors (484), secondary metabolism key enzymes (110) and carbohydrate-active enzymes (619). Synteny analysis revealed extensive structural rearrangements in the genome of Cd relative to the closely related Brassicaceae pathogen, Colletotrichum higginsianum. In addition, a 1.2 Mb species-specific region was detected within the largest core chromosome of Cd that has all the characteristics of fungal accessory chromosomes (transposon-rich, gene-poor, distinct codon usage), providing evidence for exchange between these two genomic compartments. This region was also unique in having undergone extensive intra-chromosomal segmental duplications. Our findings provide insights into the evolution of accessory regions and possible mechanisms for generating genetic diversity in this asexual fungal pathogen.
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Affiliation(s)
- Nicolas Lapalu
- Université Paris-Saclay, INRAE, UR BIOGER, 91120 Palaiseau, France
| | - Adeline Simon
- Université Paris-Saclay, INRAE, UR BIOGER, 91120 Palaiseau, France
| | - Antoine Lu
- Université Paris-Saclay, INRAE, UR BIOGER, 91120 Palaiseau, France
| | - Peter-Louis Plaumann
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Joëlle Amselem
- Université Paris-Saclay, INRAE, URGI, 78000 Versailles, France
| | - Sandrine Pigné
- Université Paris-Saclay, INRAE, UR BIOGER, 91120 Palaiseau, France
| | - Annie Auger
- Université Paris-Saclay, INRAE, UR BIOGER, 91120 Palaiseau, France
| | - Christian Koch
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
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Coelho MA, David-Palma M, Shea T, Bowers K, McGinley-Smith S, Mohammad AW, Gnirke A, Yurkov AM, Nowrousian M, Sun S, Cuomo CA, Heitman J. Comparative genomics of the closely related fungal genera Cryptococcus and Kwoniella reveals karyotype dynamics and suggests evolutionary mechanisms of pathogenesis. PLoS Biol 2024; 22:e3002682. [PMID: 38843310 PMCID: PMC11185503 DOI: 10.1371/journal.pbio.3002682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 06/18/2024] [Accepted: 05/17/2024] [Indexed: 06/19/2024] Open
Abstract
In exploring the evolutionary trajectories of both pathogenesis and karyotype dynamics in fungi, we conducted a large-scale comparative genomic analysis spanning the Cryptococcus genus, encompassing both global human fungal pathogens and nonpathogenic species, and related species from the sister genus Kwoniella. Chromosome-level genome assemblies were generated for multiple species, covering virtually all known diversity within these genera. Although Cryptococcus and Kwoniella have comparable genome sizes (about 19.2 and 22.9 Mb) and similar gene content, hinting at preadaptive pathogenic potential, our analysis found evidence of gene gain (via horizontal gene transfer) and gene loss in pathogenic Cryptococcus species, which might represent evolutionary signatures of pathogenic development. Genome analysis also revealed a significant variation in chromosome number and structure between the 2 genera. By combining synteny analysis and experimental centromere validation, we found that most Cryptococcus species have 14 chromosomes, whereas most Kwoniella species have fewer (11, 8, 5, or even as few as 3). Reduced chromosome number in Kwoniella is associated with formation of giant chromosomes (up to 18 Mb) through repeated chromosome fusion events, each marked by a pericentric inversion and centromere loss. While similar chromosome inversion-fusion patterns were observed in all Kwoniella species with fewer than 14 chromosomes, no such pattern was detected in Cryptococcus. Instead, Cryptococcus species with less than 14 chromosomes showed reductions primarily through rearrangements associated with the loss of repeat-rich centromeres. Additionally, Cryptococcus genomes exhibited frequent interchromosomal translocations, including intercentromeric recombination facilitated by transposons shared between centromeres. Overall, our findings advance our understanding of genetic changes possibly associated with pathogenicity in Cryptococcus and provide a foundation to elucidate mechanisms of centromere loss and chromosome fusion driving distinct karyotypes in closely related fungal species, including prominent global human pathogens.
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Affiliation(s)
- Marco A. Coelho
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Márcia David-Palma
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Terrance Shea
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Katharine Bowers
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Sage McGinley-Smith
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Arman W. Mohammad
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Andreas Gnirke
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Andrey M. Yurkov
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Minou Nowrousian
- Lehrstuhl für Molekulare und Zelluläre Botanik, Ruhr-Universität Bochum, Bochum, Germany
| | - Sheng Sun
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Christina A. Cuomo
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, United States of America
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Coelho MA, David-Palma M, Shea T, Bowers K, McGinley-Smith S, Mohammad AW, Gnirke A, Yurkov AM, Nowrousian M, Sun S, Cuomo CA, Heitman J. Comparative genomics of Cryptococcus and Kwoniella reveals pathogenesis evolution and contrasting karyotype dynamics via intercentromeric recombination or chromosome fusion. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.27.573464. [PMID: 38234769 PMCID: PMC10793447 DOI: 10.1101/2023.12.27.573464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
A large-scale comparative genomic analysis was conducted for the global human fungal pathogens within the Cryptococcus genus, compared to non-pathogenic Cryptococcus species, and related species from the sister genus Kwoniella. Chromosome-level genome assemblies were generated for multiple species of both genera, resulting in a dataset encompassing virtually all of their known diversity. Although Cryptococcus and Kwoniella have comparable genome sizes (about 19.2 and 22.9 Mb) and similar gene content, hinting at pre-adaptive pathogenic potential, our analysis found evidence in pathogenic Cryptococcus species of specific examples of gene gain (via horizontal gene transfer) and gene loss, which might represent evolutionary signatures of pathogenic development. Genome analysis also revealed a significant variation in chromosome number and structure between the two genera. By combining synteny analysis and experimental centromere validation, we found that most Cryptococcus species have 14 chromosomes, whereas most Kwoniella species have fewer (11, 8, 5 or even as few as 3). Reduced chromosome number in Kwoniella is associated with formation of giant chromosomes (up to 18 Mb) through repeated chromosome fusion events, each marked by a pericentric inversion and centromere loss. While similar chromosome inversion-fusion patterns were observed in all Kwoniella species with fewer than 14 chromosomes, no such pattern was detected in Cryptococcus. Instead, Cryptococcus species with less than 14 chromosomes, underwent chromosome reductions primarily through rearrangements associated with the loss of repeat-rich centromeres. Additionally, Cryptococcus genomes exhibited frequent interchromosomal translocations, including intercentromeric recombination facilitated by transposons shared between centromeres. Taken together, our findings advance our understanding of genomic changes possibly associated with pathogenicity in Cryptococcus and provide a foundation to elucidate mechanisms of centromere loss and chromosome fusion driving distinct karyotypes in closely related fungal species, including prominent global human pathogens.
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Affiliation(s)
- Marco A. Coelho
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Márcia David-Palma
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Terrance Shea
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Katharine Bowers
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | | | | | - Andreas Gnirke
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Andrey M. Yurkov
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Minou Nowrousian
- Lehrstuhl für Molekulare und Zelluläre Botanik, Ruhr-Universität Bochum, Bochum, Germany
| | - Sheng Sun
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | | | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
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Dvorianinova EM, Sigova EA, Mollaev TD, Rozhmina TA, Kudryavtseva LP, Novakovskiy RO, Turba AA, Zhernova DA, Borkhert EV, Pushkova EN, Melnikova NV, Dmitriev AA. Comparative Genomic Analysis of Colletotrichum lini Strains with Different Virulence on Flax. J Fungi (Basel) 2023; 10:32. [PMID: 38248942 PMCID: PMC10817032 DOI: 10.3390/jof10010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 12/04/2023] [Accepted: 12/24/2023] [Indexed: 01/23/2024] Open
Abstract
Colletotrichum lini is a flax fungal pathogen. The genus comprises differently virulent strains, leading to significant yield losses. However, there were no attempts to investigate the molecular mechanisms of C. lini pathogenicity from high-quality genome assemblies until this study. In this work, we sequenced the genomes of three C. lini strains of high (#390-1), medium (#757), and low (#771) virulence. We obtained more than 100× genome coverage with Oxford Nanopore Technologies reads (N50 = 12.1, 6.1, 5.0 kb) and more than 50× genome coverage with Illumina data (150 + 150 bp). Several assembly strategies were tested. The final assemblies were obtained using the Canu-Racon ×2-Medaka-Polca scheme. The assembled genomes had a size of 54.0-55.3 Mb, 26-32 contigs, N50 values > 5 Mb, and BUSCO completeness > 96%. A comparative genomic analysis showed high similarity among mitochondrial and nuclear genomes. However, a rearrangement event and the loss of a 0.7 Mb contig were revealed. After genome annotation with Funannotate, secreting proteins were selected using SignalP, and candidate effectors were predicted among them using EffectorP. The analysis of the InterPro annotations of predicted effectors revealed unique protein categories in each strain. The assembled genomes and the conducted comparative analysis extend the knowledge of the genetic diversity of C. lini and form the basis for establishing the molecular mechanisms of its pathogenicity.
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Affiliation(s)
- Ekaterina M. Dvorianinova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Elizaveta A. Sigova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
- Moscow Institute of Physics and Technology, Moscow 141701, Russia
| | - Timur D. Mollaev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
- Agrarian and Technological Institute, Peoples Friendship University of Russia (RUDN University), Moscow 117198, Russia
| | - Tatiana A. Rozhmina
- Federal Research Center for Bast Fiber Crops, Torzhok 172002, Russia; (T.A.R.); (L.P.K.)
| | | | - Roman O. Novakovskiy
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Anastasia A. Turba
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Daiana A. Zhernova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Elena V. Borkhert
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Elena N. Pushkova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Nataliya V. Melnikova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
| | - Alexey A. Dmitriev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia; (E.A.S.); (T.D.M.); (R.O.N.); (A.A.T.); (D.A.Z.); (E.V.B.); (E.N.P.); (N.V.M.)
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