Systems-based analysis of the Sarcocystis neurona genome identifies pathways that contribute to a heteroxenous life cycle.
Identifieur interne : 000521 ( Main/Exploration ); précédent : 000520; suivant : 000522Systems-based analysis of the Sarcocystis neurona genome identifies pathways that contribute to a heteroxenous life cycle.
Auteurs : Tomasz Blazejewski [Canada] ; Nirvana Nursimulu ; Viviana Pszenny [États-Unis] ; Sriveny Dangoudoubiyam [États-Unis] ; Sivaranjani Namasivayam [États-Unis] ; Melissa A. Chiasson [États-Unis] ; Kyle Chessman ; Michelle Tonkin [Canada] ; Lakshmipuram S. Swapna [Canada] ; Stacy S. Hung ; Joshua Bridgers [États-Unis] ; Stacy M. Ricklefs [États-Unis] ; Martin J. Boulanger [Canada] ; Jitender P. Dubey [États-Unis] ; Stephen F. Porcella [États-Unis] ; Jessica C. Kissinger ; Daniel K. Howe [États-Unis] ; Michael E. Grigg [Canada] ; John ParkinsonSource :
- mBio [ 2150-7511 ] ; 2015.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Protozoan Proteins.
- classification : Sarcocystis.
- genetics : Sarcocystis.
- growth & development : Sarcocystis.
- metabolism : Sarcocystis.
- parasitology : Sarcocystosis.
- veterinary : Sarcocystosis.
- Animals, Genome, Protozoan, Humans, Life Cycle Stages, Phylogeny.
Abstract
Sarcocystis neurona is a member of the coccidia, a clade of single-celled parasites of medical and veterinary importance including Eimeria, Sarcocystis, Neospora, and Toxoplasma. Unlike Eimeria, a single-host enteric pathogen, Sarcocystis, Neospora, and Toxoplasma are two-host parasites that infect and produce infectious tissue cysts in a wide range of intermediate hosts. As a genus, Sarcocystis is one of the most successful protozoan parasites; all vertebrates, including birds, reptiles, fish, and mammals are hosts to at least one Sarcocystis species. Here we sequenced Sarcocystis neurona, the causal agent of fatal equine protozoal myeloencephalitis. The S. neurona genome is 127 Mbp, more than twice the size of other sequenced coccidian genomes. Comparative analyses identified conservation of the invasion machinery among the coccidia. However, many dense-granule and rhoptry kinase genes, responsible for altering host effector pathways in Toxoplasma and Neospora, are absent from S. neurona. Further, S. neurona has a divergent repertoire of SRS proteins, previously implicated in tissue cyst formation in Toxoplasma. Systems-based analyses identified a series of metabolic innovations, including the ability to exploit alternative sources of energy. Finally, we present an S. neurona model detailing conserved molecular innovations that promote the transition from a purely enteric lifestyle (Eimeria) to a heteroxenous parasite capable of infecting a wide range of intermediate hosts.
DOI: 10.1128/mBio.02445-14
PubMed: 25670772
Affiliations:
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Grigg</name><affiliation wicri:level="1"><nlm:affiliation>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland, USA john.parkinson@utoronto.ca griggm@niaid.nih.gov.</nlm:affiliation><country wicri:rule="url">Canada</country><wicri:regionArea>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland</wicri:regionArea><wicri:noRegion>Maryland</wicri:noRegion></affiliation></author><author><name sortKey="Parkinson, John" sort="Parkinson, John" uniqKey="Parkinson J" first="John" last="Parkinson">John Parkinson</name><affiliation><nlm:affiliation>john.parkinson@utoronto.ca griggm@niaid.nih.gov.</nlm:affiliation><wicri:noCountry code="no comma">john.parkinson@utoronto.ca griggm@niaid.nih.gov.</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2015">2015</date><idno type="RBID">pubmed:25670772</idno><idno type="pmid">25670772</idno><idno type="doi">10.1128/mBio.02445-14</idno><idno type="wicri:Area/PubMed/Corpus">000565</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000565</idno><idno type="wicri:Area/PubMed/Curation">000565</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000565</idno><idno type="wicri:Area/PubMed/Checkpoint">000565</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000565</idno><idno type="wicri:Area/Ncbi/Merge">001A64</idno><idno type="wicri:Area/Ncbi/Curation">001A64</idno><idno type="wicri:Area/Ncbi/Checkpoint">001A64</idno><idno type="wicri:Area/Main/Merge">000522</idno><idno type="wicri:Area/Main/Curation">000521</idno><idno type="wicri:Area/Main/Exploration">000521</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Systems-based analysis of the Sarcocystis neurona genome identifies pathways that contribute to a heteroxenous life cycle.</title><author><name sortKey="Blazejewski, Tomasz" sort="Blazejewski, Tomasz" uniqKey="Blazejewski T" first="Tomasz" last="Blazejewski">Tomasz Blazejewski</name><affiliation wicri:level="1"><nlm:affiliation>Program in Molecular Structure and Function, Hospital for Sick Children, Toronto, Ontario, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Program in Molecular Structure and Function, Hospital for Sick Children, Toronto, Ontario</wicri:regionArea><wicri:noRegion>Ontario</wicri:noRegion></affiliation></author><author><name sortKey="Nursimulu, Nirvana" sort="Nursimulu, Nirvana" uniqKey="Nursimulu N" first="Nirvana" last="Nursimulu">Nirvana Nursimulu</name></author><author><name sortKey="Pszenny, Viviana" sort="Pszenny, Viviana" uniqKey="Pszenny V" first="Viviana" last="Pszenny">Viviana Pszenny</name><affiliation wicri:level="2"><nlm:affiliation>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Dangoudoubiyam, Sriveny" sort="Dangoudoubiyam, Sriveny" uniqKey="Dangoudoubiyam S" first="Sriveny" last="Dangoudoubiyam">Sriveny Dangoudoubiyam</name><affiliation wicri:level="2"><nlm:affiliation>Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, Kentucky, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, Kentucky</wicri:regionArea><placeName><region type="state">Kentucky</region></placeName></affiliation></author><author><name sortKey="Namasivayam, Sivaranjani" sort="Namasivayam, Sivaranjani" uniqKey="Namasivayam S" first="Sivaranjani" last="Namasivayam">Sivaranjani Namasivayam</name><affiliation wicri:level="2"><nlm:affiliation>Department of Genetics, University of Georgia, Athens, Georgia, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Genetics, University of Georgia, Athens, Georgia</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Chiasson, Melissa A" sort="Chiasson, Melissa A" uniqKey="Chiasson M" first="Melissa A" last="Chiasson">Melissa A. Chiasson</name><affiliation wicri:level="2"><nlm:affiliation>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Chessman, Kyle" sort="Chessman, Kyle" uniqKey="Chessman K" first="Kyle" last="Chessman">Kyle Chessman</name></author><author><name sortKey="Tonkin, Michelle" sort="Tonkin, Michelle" uniqKey="Tonkin M" first="Michelle" last="Tonkin">Michelle Tonkin</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia</wicri:regionArea><wicri:noRegion>British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Swapna, Lakshmipuram S" sort="Swapna, Lakshmipuram S" uniqKey="Swapna L" first="Lakshmipuram S" last="Swapna">Lakshmipuram S. Swapna</name><affiliation wicri:level="1"><nlm:affiliation>Program in Molecular Structure and Function, Hospital for Sick Children, Toronto, Ontario, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Program in Molecular Structure and Function, Hospital for Sick Children, Toronto, Ontario</wicri:regionArea><wicri:noRegion>Ontario</wicri:noRegion></affiliation></author><author><name sortKey="Hung, Stacy S" sort="Hung, Stacy S" uniqKey="Hung S" first="Stacy S" last="Hung">Stacy S. Hung</name></author><author><name sortKey="Bridgers, Joshua" sort="Bridgers, Joshua" uniqKey="Bridgers J" first="Joshua" last="Bridgers">Joshua Bridgers</name><affiliation wicri:level="2"><nlm:affiliation>Department of Genetics, University of Georgia, Athens, Georgia, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Genetics, University of Georgia, Athens, Georgia</wicri:regionArea><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Ricklefs, Stacy M" sort="Ricklefs, Stacy M" uniqKey="Ricklefs S" first="Stacy M" last="Ricklefs">Stacy M. Ricklefs</name><affiliation wicri:level="2"><nlm:affiliation>U.S. Department of Agriculture, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, Beltsville, Maryland, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>U.S. Department of Agriculture, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, Beltsville, Maryland</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Boulanger, Martin J" sort="Boulanger, Martin J" uniqKey="Boulanger M" first="Martin J" last="Boulanger">Martin J. Boulanger</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia</wicri:regionArea><wicri:noRegion>British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Dubey, Jitender P" sort="Dubey, Jitender P" uniqKey="Dubey J" first="Jitender P" last="Dubey">Jitender P. Dubey</name><affiliation wicri:level="2"><nlm:affiliation>U.S. Department of Agriculture, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, Beltsville, Maryland, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>U.S. Department of Agriculture, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, Beltsville, Maryland</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Porcella, Stephen F" sort="Porcella, Stephen F" uniqKey="Porcella S" first="Stephen F" last="Porcella">Stephen F. Porcella</name><affiliation wicri:level="2"><nlm:affiliation>Genomics Unit, Research Technologies Section, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, Montana, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Genomics Unit, Research Technologies Section, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, Montana</wicri:regionArea><placeName><region type="state">Montana</region></placeName></affiliation></author><author><name sortKey="Kissinger, Jessica C" sort="Kissinger, Jessica C" uniqKey="Kissinger J" first="Jessica C" last="Kissinger">Jessica C. Kissinger</name></author><author><name sortKey="Howe, Daniel K" sort="Howe, Daniel K" uniqKey="Howe D" first="Daniel K" last="Howe">Daniel K. Howe</name><affiliation wicri:level="2"><nlm:affiliation>Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, Kentucky, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, Kentucky</wicri:regionArea><placeName><region type="state">Kentucky</region></placeName></affiliation></author><author><name sortKey="Grigg, Michael E" sort="Grigg, Michael E" uniqKey="Grigg M" first="Michael E" last="Grigg">Michael E. Grigg</name><affiliation wicri:level="1"><nlm:affiliation>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland, USA john.parkinson@utoronto.ca griggm@niaid.nih.gov.</nlm:affiliation><country wicri:rule="url">Canada</country><wicri:regionArea>Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, Maryland</wicri:regionArea><wicri:noRegion>Maryland</wicri:noRegion></affiliation></author><author><name sortKey="Parkinson, John" sort="Parkinson, John" uniqKey="Parkinson J" first="John" last="Parkinson">John Parkinson</name><affiliation><nlm:affiliation>john.parkinson@utoronto.ca griggm@niaid.nih.gov.</nlm:affiliation><wicri:noCountry code="no comma">john.parkinson@utoronto.ca griggm@niaid.nih.gov.</wicri:noCountry></affiliation></author></analytic><series><title level="j">mBio</title><idno type="eISSN">2150-7511</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Genome, Protozoan</term><term>Humans</term><term>Life Cycle Stages</term><term>Phylogeny</term><term>Protozoan Proteins (genetics)</term><term>Sarcocystis (classification)</term><term>Sarcocystis (genetics)</term><term>Sarcocystis (growth & development)</term><term>Sarcocystis (metabolism)</term><term>Sarcocystosis (parasitology)</term><term>Sarcocystosis (veterinary)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Protozoan Proteins</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Sarcocystis</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Sarcocystis</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Sarcocystis</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Sarcocystis</term></keywords><keywords scheme="MESH" qualifier="parasitology" xml:lang="en"><term>Sarcocystosis</term></keywords><keywords scheme="MESH" qualifier="veterinary" xml:lang="en"><term>Sarcocystosis</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Genome, Protozoan</term><term>Humans</term><term>Life Cycle Stages</term><term>Phylogeny</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sarcocystis neurona is a member of the coccidia, a clade of single-celled parasites of medical and veterinary importance including Eimeria, Sarcocystis, Neospora, and Toxoplasma. Unlike Eimeria, a single-host enteric pathogen, Sarcocystis, Neospora, and Toxoplasma are two-host parasites that infect and produce infectious tissue cysts in a wide range of intermediate hosts. As a genus, Sarcocystis is one of the most successful protozoan parasites; all vertebrates, including birds, reptiles, fish, and mammals are hosts to at least one Sarcocystis species. Here we sequenced Sarcocystis neurona, the causal agent of fatal equine protozoal myeloencephalitis. The S. neurona genome is 127 Mbp, more than twice the size of other sequenced coccidian genomes. Comparative analyses identified conservation of the invasion machinery among the coccidia. However, many dense-granule and rhoptry kinase genes, responsible for altering host effector pathways in Toxoplasma and Neospora, are absent from S. neurona. Further, S. neurona has a divergent repertoire of SRS proteins, previously implicated in tissue cyst formation in Toxoplasma. Systems-based analyses identified a series of metabolic innovations, including the ability to exploit alternative sources of energy. Finally, we present an S. neurona model detailing conserved molecular innovations that promote the transition from a purely enteric lifestyle (Eimeria) to a heteroxenous parasite capable of infecting a wide range of intermediate hosts.</div></front></TEI><affiliations><list><country><li>Canada</li><li>États-Unis</li></country><region><li>Géorgie (États-Unis)</li><li>Kentucky</li><li>Maryland</li><li>Montana</li></region></list><tree><noCountry><name sortKey="Chessman, Kyle" sort="Chessman, Kyle" uniqKey="Chessman K" first="Kyle" last="Chessman">Kyle Chessman</name><name sortKey="Hung, Stacy S" sort="Hung, Stacy S" uniqKey="Hung S" first="Stacy S" last="Hung">Stacy S. Hung</name><name sortKey="Kissinger, Jessica C" sort="Kissinger, Jessica C" uniqKey="Kissinger J" first="Jessica C" last="Kissinger">Jessica C. Kissinger</name><name sortKey="Nursimulu, Nirvana" sort="Nursimulu, Nirvana" uniqKey="Nursimulu N" first="Nirvana" last="Nursimulu">Nirvana Nursimulu</name><name sortKey="Parkinson, John" sort="Parkinson, John" uniqKey="Parkinson J" first="John" last="Parkinson">John Parkinson</name></noCountry><country name="Canada"><noRegion><name sortKey="Blazejewski, Tomasz" sort="Blazejewski, Tomasz" uniqKey="Blazejewski T" first="Tomasz" last="Blazejewski">Tomasz Blazejewski</name></noRegion><name sortKey="Boulanger, Martin J" sort="Boulanger, Martin J" uniqKey="Boulanger M" first="Martin J" last="Boulanger">Martin J. Boulanger</name><name sortKey="Grigg, Michael E" sort="Grigg, Michael E" uniqKey="Grigg M" first="Michael E" last="Grigg">Michael E. Grigg</name><name sortKey="Swapna, Lakshmipuram S" sort="Swapna, Lakshmipuram S" uniqKey="Swapna L" first="Lakshmipuram S" last="Swapna">Lakshmipuram S. Swapna</name><name sortKey="Tonkin, Michelle" sort="Tonkin, Michelle" uniqKey="Tonkin M" first="Michelle" last="Tonkin">Michelle Tonkin</name></country><country name="États-Unis"><region name="Maryland"><name sortKey="Pszenny, Viviana" sort="Pszenny, Viviana" uniqKey="Pszenny V" first="Viviana" last="Pszenny">Viviana Pszenny</name></region><name sortKey="Bridgers, Joshua" sort="Bridgers, Joshua" uniqKey="Bridgers J" first="Joshua" last="Bridgers">Joshua Bridgers</name><name sortKey="Chiasson, Melissa A" sort="Chiasson, Melissa A" uniqKey="Chiasson M" first="Melissa A" last="Chiasson">Melissa A. Chiasson</name><name sortKey="Dangoudoubiyam, Sriveny" sort="Dangoudoubiyam, Sriveny" uniqKey="Dangoudoubiyam S" first="Sriveny" last="Dangoudoubiyam">Sriveny Dangoudoubiyam</name><name sortKey="Dubey, Jitender P" sort="Dubey, Jitender P" uniqKey="Dubey J" first="Jitender P" last="Dubey">Jitender P. Dubey</name><name sortKey="Howe, Daniel K" sort="Howe, Daniel K" uniqKey="Howe D" first="Daniel K" last="Howe">Daniel K. Howe</name><name sortKey="Namasivayam, Sivaranjani" sort="Namasivayam, Sivaranjani" uniqKey="Namasivayam S" first="Sivaranjani" last="Namasivayam">Sivaranjani Namasivayam</name><name sortKey="Porcella, Stephen F" sort="Porcella, Stephen F" uniqKey="Porcella S" first="Stephen F" last="Porcella">Stephen F. Porcella</name><name sortKey="Ricklefs, Stacy M" sort="Ricklefs, Stacy M" uniqKey="Ricklefs S" first="Stacy M" last="Ricklefs">Stacy M. Ricklefs</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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