関: apicomplexan、Sporozoa

WordNet

strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites (同)class Sporozoa

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/06/10 14:12:49」(JST)

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The Apicomplexa — also called Apicomplexia — are a large group of parasitic protists, most of which possess a unique organelle, a type of plastid called an apicoplast, and an apical complex structure involved in penetrating a host's cell. They are unicellular, spore-forming, and exclusively^[3] parasites of animals. Motile structures such as flagella or pseudopods are present only in certain gamete stages. This is a diverse group including organisms such as the coccidia, gregarines, piroplasms, haemogregarines, and plasmodia. Diseases caused by apicomplexan organisms include, but are not limited to:

Babesiosis (Babesia)
Malaria (Plasmodium)
Forms of coccidiosis including:
- Cryptosporidiosis (Cryptosporidium parvum)
- Cyclosporiasis (Cyclospora cayetanensis)
- Isosporiasis (Isospora belli)
- Toxoplasmosis (Toxoplasma gondii)

The name of the taxon Apicomplexa is derived from two Latin words — apex (top) and complexus (infolds) — and refers to a set of organelles in the sporozoite. The older taxon Sporozoa was created by SChrevel in 1971 and grouped the Apicomplexa together with the Ascetosporea, Microsporidia and Myxosporida. This grouping is no longer regarded as biologically valid and its use is discouraged.^[4]

1 Phylogenetic relations
2 General morphological features
3 General features
- 3.1 Gregarines
- 3.2 Coccidians
- 3.3 Haemosporidia
4 Evolution
5 Life cycle
6 Blood-borne genera
7 Disease genomics
8 History
9 Taxonomy
- 9.1 1987
- 9.2 Jacques Euzéby (1988)
- 9.3 Roberts and Janovy (1996)
- 9.4 Perkins (2000)
10 References
11 External links

Phylogenetic relations

This has rarely been studied at the subclass level. Morrison using molecular date has shown that the haemosporidia are related to the gregarines and that the piroplasms and coccidians are sister groups.^[5] Other studies suggest that the haemosporidia and the piroplasma appear to be sister clades and are more closely related to the coccidians than to the gregarines. ^[6]

Transposons appear to be rare in this phylum but have been identified in the genera Ascogregarina and Eimeria.^[6]

General morphological features

All members of this phylum have an infectious stage — the sporozoite — which possess three distinct structures in an apical complex. The apical complex consists of a set of spirally arranged microtubules (the conoid), a secretory body (the rhoptry) and one or more polar rings. Additional slender electron-dense secretory bodies (micronemes) surrounded by one or two polar rings may also be present. It is this structure that gives the phylum its name.

A further group of spherical organelles are distributed throughout the cell rather than being localized at the apical complex and are known as the dense granules. These typically have a mean diameter of about 0.7 micrometers. Secretion of the dense-granule content takes place after parasite invasion and localization within the parasitophorous vacuole and persists for several minutes.

Other morphological findings that are common to all members of this phylum include:

The nucleus is haploid.
Flagellae are found only in the motile gamete. These are posteriorly directed and vary in number (usually one to three).
Basal bodies are present. Although hemosporidians and piroplasmids have normal triplets of microtubules in their basal bodies and coccidians and gregarines have 9 singlets.
The mitochondria have tubular cristae.
A Golgi apparatus is present.
Centrioles, chloroplasts, ejectile organelles and inclusions are absent.
Colourless plastids are present in some species.
The cell is surrounded by a pellicle of three membrane layers (the alveolar structure) penetrated by micropores.

Replication:

Mitosis: usually closed with an intranuclear spindle; in some species it is open at the poles
Cell division: usually by schizogony
Meiosis: Occurs in the zygote

Other features common to this phylum are a lack of cilia, sexual reproduction, use of micropores for feeding, movement by body flexion or gliding and the production of oocysts containing sporozoites as the infective form.

General features

Within this phylum there are three groups — coccidians, gregarines and haemosporidians. The coccidians and gregarines appear to be relatively closely related.

Perkinsus while once considered a member of this phylum has been moved to a new phylum — Perkinsozoa.

Gregarines

The gregarines are generally parasites of annelids, arthropods and mollusks. They are often found in the guts of their hosts but may invade the other tissues. In the typical gregarine life cycle a trophozoite develops within a host cell into a schizont. This then divides into a number of merozoites by schizogony. The merozoites are released by lysing the host cell, which in turn invade other cells. At some point in the apicomplexan life cycle, gametocytes are formed. These are released by lysis of the host cells, which group together. Each gametocyte forms multiple gametes. The gametes fuse with another to form oocysts. The oocysts leave the host to be taken up by a new host.

Coccidians

In general, coccidians are parasites of vertebrates. Like gregarines, they are commonly parasites of the epithelial cells of the gut but may infect other tissues.

The coccidian lifecycle involves merogony, gametogony and sporogony. While similar to that of the gregarines it differs in zygote formation. Some trophozoites enlarge and become macrogamete, wheras others divide repeatedly to form microgametes (anisogamy). The microgametes are motile and must reach the macrogamete to fertilize it. The fertilized macrogamete forms a zygote that in its turn forms an oocyst that is normally released from the body. Syzygy, when it occurs, involves markedly anisogamous gametes. The lifecycle is typically haploid, with the only diploid stage occurring in the zygote, which is normally short-lived.

Differences between the coccidia and the gregarines

The main difference between the coccidians and the gregarines is in the gamonts. In the coccida these are small, intracellular and without epimerites or mucrons. In the gregarines these are large, extracellular and possess epimerites or mucrons.

A second difference between the coccidia and the gregarines also lies in the gamonts. In the coccidia a single gamonts becomes a macrogametocyte, whereas in the gregarines the gamonts give rise to multiple gametocytes.

Haemosporidia

The Haemosporidians have more complex lifecycles that alternate between an arthropod and a vertebrate host. The trophozoite parasitises erythrocytes or other tissues in the vertebrate host. Microgametes and macrogametes are always found in the blood. The gametes are taken up by the insect vector during a blood meal. The microgametes migrate within the gut of the insect vector and fuse with the macrogametes. The fertilized macrogamete now becomes an ookinete, which penetrates the body of the vector. The ookinete then transforms into an oocyst and divides initially by meiosis and then by mitosis (haplontic life cycle) to give rise to the sporozoites. The sporozoites escape from the oocyst and migrate within the body of the vector to the salivary glands where they are injected into the new vertebrate host when the insect vector feeds again.

Evolution

All members of this phylum are parasitic and evolved from a free-living ancestor. It is presumed that this lifestyle evolved at the time of the divergence of dinoﬂagellates and apicomplexans.^[7]^[8] Further evolution of this phylum has been estimated to have occurred ~800 million years ago.^[9] The oldest extant clade is thought to be the archigregarines.^[7]

Many Coccidiomorpha have an intermediate host as well as a primary host, and the evolution of hosts proceeded in different ways and at different times in these groups. For some coccidiomorphs, the original host has become the intermediate host, whereas in others it has become the definitive host. In the genera Aggregata, Atoxoplasma, Cystoisospora, Schellackia and Toxoplasma the original is now definitive, whereas in Akiba, Babesiosoma, Babesia, Haemogregarina, Haemoproteus, Hepatozoon, Karyolysus, Leucocytozoon, Plasmodium, Sarcocystis, and Theileria; the original hosts are now intermediate.

Similar strategies to increase the likelihood of transmission have evolved in multiple genera. Polyenergid oocysts and tissue cysts are found in representatives of the orders Protococcidiorida and Eimeriida. Hypnozoites are found in Karyolysus lacerate and most species of Plasmodium; transovarial transmission of parasites occurs in lifecycles of Karyolysus and Babesia.

Horizontal gene transfer appears to have occurred early on in this phylum's evolution with the transfer of a histone H4 lysine 20 (H4K20) modifier, Set8, from an animal host to the ancestor of apicomplexans.^[10] A second gene — H3K36 methyltransferase (Ashr3 in plants) — may have also be horizontally transferred.

Life cycle

Generic life cycle of an apicomplexa: 1-zygote (cyst), 2-sporozoites, 3-merozoites, 4-gametocytes.

Apicomplexan structure: 1-polar ring, 2-conoid, 3-micronemes, 4-rhoptries, 5-nucleus, 6-nucleolus, 7-mitochondria, 8-posterior ring, 9-alveoli, 10-golgi apparatus, 11-micropore.

Most members have a complex life-cycle, involving both asexual and sexual reproduction. Typically, a host is infected via an active invasion by the parasites (similar to entosis), which divide to produce sporozoites that enter its cells. Eventually, the cells burst, releasing merozoites, which infect new cells. This may occur several times, until gamonts are produced, forming gametes that fuse to create new cysts. There are many variations on this basic pattern, however, and many Apicomplexa have more than one host.

The apical complex includes vesicles called rhoptries and micronemes, which open at the anterior of the cell. These secrete enzymes that allow the parasite to enter other cells. The tip is surrounded by a band of microtubules, called the polar ring, and among the Conoidasida there is also a funnel of tubulin proteins called the conoid.^[11] Over the rest of the cell, except for a diminished mouth called the micropore, the membrane is supported by vesicles called alveoli, forming a semi-rigid pellicle.

The presence of alveoli and other traits place the Apicomplexa among a group called the alveolates. Several related flagellates, such as Perkinsus and Colpodella, have structures similar to the polar ring and were formerly included here, but most appear to be closer relatives of the dinoflagellates. They are probably similar to the common ancestor of the two groups.

Another similarity is that many apicomplexan cells contain a single plastid, called the apicoplast, surrounded by either 3 or four membranes. Its functions are thought to include tasks such as lipid and heme biosynthesis, and it appears to be necessary for survival. In general, plastids are considered to have a common origin with the chloroplasts of dinoflagellates, and evidence points to an origin from red algae rather than green.^[12]^[13]

The Apicomplexa comprise the bulk of what used to be called the Sporozoa, a group for parasitic protozoans without flagella, pseudopods, or cilia. Most of the Apicomplexa are motile, however. The other main lines were the Ascetosporea, the Myxozoa (now known to be derived from animals), and the Microsporidia (now known to be derived from fungi). Sometimes the name Sporozoa is taken as a synonym for the Apicomplexa, or occasionally as a subset.

Blood-borne genera

Within the Apicomplexa there are three suborders of parasites.

suborder Adeleorina — 8 genera
suborder Haemosporina — all genera in this suborder
suborder Eimeriorina — 2 genera (Lankesterella and Schellackia)

Within the Adelorina are species that infect invertebrates and others that infect vertebrates.

The Haemosporina includes the malaria parasites and their relatives.

The Eimeriorina — the largest suborder in this phylum — the lifecycle involves both sexual and asexual stages. The asexual stages reproduce by schizogony. The male gametocyte produces a large number of gametes and the zygote gives rise to an oocyst, which is the infective stage. The majority are monoxenous (infect one host only) but a few are heteroxenous (lifecycle involves two or more hosts).

Both the number of families in this later suborder is debated with the number of families being between one and twenty depending on the authority and the number of genera being between nineteen and twenty five. This somewhat unsatisfactory state of affairs awaits resolution with DNA based methods.

Disease genomics

As noted above, many of the apicomplexan parasites are important pathogens of human and domestic animals. In contrast to bacterial pathogens, these apicomplexan parasites are eukaryotic and share many metabolic pathways with their animal hosts. This fact makes therapeutic target development extremely difficult – a drug that harms an apicomplexan parasite is also likely to harm its human host. At the present time, there are no effective vaccines available for most diseases caused by these parasites. Biomedical research on these parasites is challenging because it is often difficult, if not impossible, to maintain live parasite cultures in the laboratory and to genetically manipulate these organisms. In recent years, several of the apicomplexan species have been selected for genome sequencing. The availability of genome sequences provides a new opportunity for scientists to learn more about the evolution and biochemical capacity of these parasites. The predominant source of this genomic information is the EuPathDB ^[14]family of websites, which currently provide specialised services for Plasmodium species (PlasmoDB),^[15]^[16] coccidians (ToxoDB),^[17]^[18] piroplasms (PiroplasmaDB),^[19] and Cryptosporidium species (CryptoDB).^[20]^[21] One possible target for drugs is the plastid, and in fact existing drugs such as tetracyclines, which are effective against apicomplexans seem to operate against the plastid.^[22]

Most apicomplexans have an apicoplast, (a non-photosynthetic plastid) and mitochondrial and nuclear genomes, although Cryptosporidium species and gregarines are possible exceptions, as they are thought to have lost their plastids after the diverging last common ancestor of apicomplexans^{[citation needed]}.

History

The first Apicomplexan protozoan was seen by Antonie van Leeuwenhoek, who in 1674 saw oocysts of Eimeria stiedae in the gall bladder of a rabbit. The first member of the phylum to be named (by Dufour in 1828) was Gregarina ovata in earwigs. Since then, many more have been identified and named. During the quarter century 1826–1850, 41 species and 6 genera of Apicomplexa were named. In the quarter-century 1951–1975, 1873 new species and 83 new genera were added.

Taxonomy

The field of classifying Apicomplexa is in flux and classification has changed throughout the years since it was formally named in 1970.^[1]

1987

By 1987 a comprehensive survey of the phylum was completed: in all, 4516 species and 339 genera had been named. They consisted of^{[citation needed]}:

the gregarines (subclass Gregarinasida) with 1624 named species and 231 named genera
the hemogregarines (family Haemogregarinidae) with 399 species and 4 genera
the eimeriorins (order Eimeriorida) with 1771 species and 43 genera
the hemospororids (order Haemosporasina) with 444 species and 9 genera
the piroplasmids (order Piroplasmorida) with 173 species and 20 genera
and a few others (105 species and 32 genera)

Although there has been considerable revision of this phylum (the order Haemosporidia now has 17 genera rather than 9), it seems likely these numbers are still approximately correct.

Jacques Euzéby (1988)

Jacques Euzéby in 1988^[23] created a new class Haemosporidiasina by merging subclass Piroplasmasina and suborder Haemospororina.

Subclass Gregarinasina (the gregarines)
Subclass Coccidiasina
- Suborder Adeleorina (the adeleorins)
- Suborder Eimeriorina (the eimeriorins)
Subclass Haemosporidiasina
- Order Achromatorida
- Order Chromatorida

The division into Achromatorida and Chromatorida although proposed on morphological grounds may have a biological basis as the ability to store haemozoin appears to have evolved only once.^[24]

Roberts and Janovy (1996)

Roberts and Janovy in 1996 divided the phylum into the following subclasses and suborders (omitting classes and orders):^[25]

Subclass Gregarinasina (the gregarines)
Subclass Coccidiasina
- Suborder Adeleorina (the adeleorins)
- Suborder Eimeriorina (the eimeriorins)
- Suborder Haemospororina (the haemospororins)
Subclass Piroplasmasina (the piroplasms)

These form the following five taxonomic groups:

The gregarines are, in general, one-host parasites of invertebrates.
The adeleorins are one-host parasites of invertebrates or vertebrates, or two-host parasites that alternately infect haematophagous (blood-feeding) invertebrates and the blood of vertebrates.
The eimeriorins are a diverse group that includes one host species of invertebrates, two-host species of invertebrates, one-host species of vertebrates and two-host species of vertebrates. The eimeriorins are frequently called the coccidia. This term is often used to include the adeleorins.
Haemospororins often known as the malaria parasites, are two-host Apicomplexa that parasitize blood-feeding dipteran flies and the blood of various tetrapod vertebrates.
Piroplasms where all the species included are two-host parasites infecting ticks and vertebrates.

Perkins (2000)

This scheme is taken from Perkins et al.^[26] It is outdated as the Perkinsidae have since been recognised as a sister group to the dinoflagellates rather that the Apicomplexia. The remainder of the scheme appears to be valid:

Class Aconoidasida

Conoid present only in the ookinete of some species

Order Haemospororida

Macrogamete and microgamete develop separately. Syzygy does not occur. Ookinete has a conoid. Sporozoites have three walls. Heteroxenous: alternates between vertebrate host (in which merogony occurs) and invertebrate host (in which sporogony occurs). Usually blood parasites, transmitted by blood-sucking insects.

Order Piroplasmorida

Class Conoidasida
- Subclass Gregarinasina
  - Order Archigregarinorida
  - Order Eugregarinorida
    - Suborder Adeleorina
    - Suborder Eimeriorina
  - Order Neogregarinorida
- Subclass Coccidiasina
  - Order Agamococcidiorida
  - Order Eucoccidiorida
  - Order Ixorheorida
  - Order Protococcidiorida
Class Perkinsasida

Order Perkinsorida

Family Perkinsidae

The name Protospiromonadida has been proposed for the common ancestor of the Gregarinomorpha and Coccidiomorpha.^[27]

References

^ ^a ^b Levine ND (1970). Taxonomy of the Sporozoa. "Proceedings Of the Second International Congress of Parasitology". J Parasitol 56 (4, Sect. 2, Part 1: Suppl.): 208–9. JSTOR 3277701.
^ Levine ND (May 1971). "Uniform Terminology for the Protozoan Subphylum Apicomplexa". J Eukaryot Microbiol 18 (2): 352–5. doi:10.1111/j.1550-7408.1971.tb03330.x.
^ Jadwiga Grabda (1991). Marine fish parasitology: an outline. VCH. p. 8. ISBN 0-89573-823-6.
^ "Introduction to the Apicomplexa". Archived from the original on 20 April 2009. Retrieved 2009-05-31.
^ Morrison DA (August 2009). "Evolution of the Apicomplexa: where are we now?". Trends Parasitol. 25 (8): 375–82. doi:10.1016/j.pt.2009.05.010. PMID 19635681.
^ ^a ^b Templeton TJ, Enomoto S, Chen WJ, et al. (February 2010). "A genome-sequence survey for Ascogregarina taiwanensis supports evolutionary affiliation but metabolic diversity between a Gregarine and Cryptosporidium". Mol. Biol. Evol. 27 (2): 235–48. doi:10.1093/molbev/msp226. PMC 2877549. PMID 19778951.
^ ^a ^b Kuvardina ON, Leander BS, Aleshin VV, Myl'nikov AP, Keeling PJ, Simdyanov TG (November 2002). "The phylogeny of colpodellids (Alveolata) using small subunit rRNA gene sequences suggests they are the free-living sister group to apicomplexans". J. Eukaryot. Microbiol. 49 (6): 498–504. doi:10.1111/j.1550-7408.2002.tb00235.x. PMID 12503687.
^ Leander BS, Keeling PJ (August 2003). "Morphostasis in alveolate evolution". Trends Ecol Evol 18 (8): 395—402. doi:10.1016/S0169-5347(03)00152-6.
^ Escalante AA, Ayala FJ (June 1995). "Evolutionary origin of Plasmodium and other Apicomplexa based on rRNA genes". Proc. Natl. Acad. Sci. U.S.A. 92 (13): 5793–7. doi:10.1073/pnas.92.13.5793. PMC 41587. PMID 7597031.
^ Kishore SP, Stiller JW, Deitsch KW (2013). "Horizontal gene transfer of epigenetic machinery and evolution of parasitism in the malaria parasite Plasmodium falciparum and other apicomplexans". BMC Evol. Biol. 13: 37. doi:10.1186/1471-2148-13-37. PMC 3598677. PMID 23398820.
^ Duszynski1, Donald W.; Upton, Steve J.; Couch, Lee (2004-02-21). "The Coccidia of the World" (Online database). Department of Biology, University of New Mexico, and Division of Biology, Kansas State University.
^ Patrick J. Keeling (2004). "Diversity and evolutionary history of plastids and their hosts". American Journal of Botany 91 (10): 1481–1493. doi:10.3732/ajb.91.10.1481. PMID 21652304.
^ Ram, Ev; Naik, R; Ganguli, M; Habib, S (July 2008). "DNA organization by the apicoplast-targeted bacterial histone-like protein of Plasmodium falciparum". Nucleic Acids Research 36 (15): 5061–73. doi:10.1093/nar/gkn483. PMC 2528193. PMID 18663012.
^ "EuPathDB". Retrieved 2012-01-02.
^ Bahl, A.; Brunk, B.; Crabtree, J.; Fraunholz, M. J.; Gajria, B.; Grant, G. R.; Ginsburg, H.; Gupta, D.; Kissinger, J. C.; Labo, P.; Li, L.; Mailman, M. D.; Milgram, A. J.; Pearson, D. S.; Roos, D. S.; Schug, J.; Stoeckert Jr, C. J.; Whetzel, P. (2003). "PlasmoDB: The Plasmodium genome resource. A database integrating experimental and computational data". Nucleic Acids Research 31 (1): 212–215. doi:10.1093/nar/gkg081. PMC 165528. PMID 12519984. edit
^ "PlasmoDB". Retrieved 2012-01-02.
^ Kissinger, J. C.; Gajria, B.; Li, L.; Paulsen, I. T.; Roos, D. S. (2003). "ToxoDB: Accessing the Toxoplasma gondii genome". Nucleic Acids Research 31 (1): 234–236. doi:10.1093/nar/gkg072. PMC 165519. PMID 12519989. edit
^ "ToxoDB". Retrieved 2012-01-02.
^ "PiroplasmaDB". Retrieved 2012-01-02.
^ Heiges, M.; Wang, H.; Robinson, E.; Aurrecoechea, C.; Gao, X.; Kaluskar, N.; Rhodes, P.; Wang, S.; He, C. Z.; Su, Y.; Miller, J.; Kraemer, E.; Kissinger, J. C. (2006). "CryptoDB: A Cryptosporidium bioinformatics resource update". Nucleic Acids Research 34 (90001): D419–D422. doi:10.1093/nar/gkj078. PMC 1347441. PMID 16381902. edit
^ "CryptoDB". Retrieved 2012-01-02.
^ Dahl, El; Shock, Jl; Shenai, Br; Gut, J; Derisi, Jl; Rosenthal, Pj (September 2006). "Tetracyclines specifically target the apicoplast of the malaria parasite Plasmodium falciparum" (Free full text). Antimicrobial agents and chemotherapy 50 (9): 3124–31. doi:10.1128/AAC.00394-06. PMC 1563505. PMID 16940111.
^ Euzéby, J. (1988). Apicomplexa, 2: Hémosporidioses, Fascicule 1: Plasmodiidés, Haemoproteidés "Piroplasmes" (caractères généraux). Protozoologie Médicale Comparée 3. Fondation Marcel Merieux. ISBN 2901773737. OCLC 463445910.
^ Martinsen ES, Perkins SL, Schall JJ (April 2008). "A three-genome phylogeny of malaria parasites (Plasmodium and closely related genera): evolution of life-history traits and host switches". Mol. Phylogenet. Evol. 47 (1): 261–73. doi:10.1016/j.ympev.2007.11.012. PMID 18248741.
^ Roberts, L.; Janovy, J. (1996). Foundations of Parasitology (5th ed.). Dubuque IA: Wm. C. Brown. ISBN 0697260712. OCLC 33439613.
^ Perkins FO, Barta JR, Clopton RE, Peirce MA, Upton SJ (2000). "Phylum Apicomplexa". In Lee JJ, Leedale GF, Bradbury P. An Illustrated guide to the Protozoa : organisms traditionally referred to as protozoa, or newly discovered groups 1 (2nd ed.). Society of Protozoologists. pp. 190–369. ISBN 1891276220. OCLC 704052757.
^ Krylov MV (1992). "[The origin of heteroxeny in Sporozoa]". Parazitologia (in Russian) 26 (5): 361–8. PMID 1297964.

External links

Brands, S.J. (2000). "The Taxonomicon & Systema Naturae" (Website database). Taxon: Genus Cryptosporidium. Universal Taxonomic Services, Amsterdam, The Netherlands.
Roos, David. "Biology of Apicomplexan Parasites". iBioSeminars: Microbiology. iBiology.
"Apicomplexa". NCBI Taxonomy Browser. 5794.

UpToDate Contents

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1. バベシア症の疫学および病因 epidemiology and pathogenesis of babesiosis

English Journal

Targeting lipid biosynthesis and salvage in apicomplexan parasites for improved chemotherapies.

Coppens I.SourceDepartment of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland 21205, USA.
Nature reviews. Microbiology.Nat Rev Microbiol.2013 Dec;11(12):823-35. doi: 10.1038/nrmicro3139. Epub 2013 Oct 28.
Apicomplexa are some of the most widespread and poorly controlled pathogens in the world. The metabolism of lipids in these parasites, which include Plasmodium spp., Toxoplasma gondii and Cryptosporidium spp., is essential for the production of infectious progeny and pathogen persistence in their ma
PMID 24162026

Cystoisospora canis (Apicomplexa: Sarcocystidae): development of monozoic tissue cysts in human cells, demonstration of egress of zoites from tissue cysts, and demonstration of repeat monozoic tissue cyst formation by zoites.

Houk AE, Lindsay DS.SourceDepartment of Biomedical Science and Pathology, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, 1410 Prices Fork Road, Blacksburg, VA 24061, USA.
Veterinary parasitology.Vet Parasitol.2013 Nov 8;197(3-4):455-61. doi: 10.1016/j.vetpar.2013.07.022. Epub 2013 Jul 22.
Sporozoites of Cystoisospora canis penetrated and developed to monozoic tissue cysts in 4 human, 1 monkey, 1 bovine and 2 canine cell lines. No asexual division was documented although multiple infection of a single cell was observed. Examination of cultures using transmission electron microscopy de
PMID 23953145

Emerging roles for protein S-palmitoylation in Toxoplasma biology.

Frénal K, Kemp LE, Soldati-Favre D.SourceDepartment of Microbiology and Molecular Medicine, University of Geneva, 1 rue Michel-Servet, 1211 Geneva 4, Switzerland. Electronic address: karine.frenal@unige.ch.
International journal for parasitology.Int J Parasitol.2013 Nov 1. pii: S0020-7519(13)00252-X. doi: 10.1016/j.ijpara.2013.09.004. [Epub ahead of print]
Post-translational modifications are refined, rapidly responsive and powerful ways to modulate protein function. Among post-translational modifications, acylation is now emerging as a widespread modification exploited by eukaryotes, bacteria and viruses to control biological processes. Protein palmi
PMID 24184909

Japanese Journal

アルベオラータ生物群 : 多様性と系統

堀口健雄
日本プランクトン学会報 58(1), 32-39, 2011-02-26
NAID 10027957062

The novel protein BboRhop68 is expressed by intraerythrocytic stages of Babesia bovis

BARAVALLE M. E.,THOMPSON C.,DE ECHAIDE S. Torioni,PALACIOS C.,VALENTINI B.,SUAREZ C. E.,FLORIN CHRISTENSEN M.,ECHAIDE I.
Parasitology international : official journal of the Japanese Society of Parasitology 59(4), 571-578, 2010-12-01
NAID 10029826408

Related Pictures

★リンクテーブル★

リンク元	「アピコンプレクサ」「アピコンプレクサ類」「アピコンプレックス」「アピコンプレックス門」「Sporozoa」

「アピコンプレクサ」

Apicomplexa
	Plasmodium
Scientific classification
Domain:	Eukaryota
Kingdom:	Chromalveolata
Superphylum:	Alveolata
Phylum:	Apicomplexa; Levine, 1970
Classes & Subclasses Perkins, 2000
	Aconoidasida (without conoid); Conoidasida (with conoid) Coccidia or Coccidiasina; Gregarinia or Gregarinasina; ;

　　[★]

ラ: Apicomplexa、apicomplexan
関: 胞子虫、アピコンプレックス門、アピコンプレックス、アピコンプレクサ類

「アピコンプレクサ類」

　　[★]

ラ: Apicomplexa
関: アピコンプレクサ、アピコンプレックス門、アピコンプレックス

「アピコンプレックス」

　　[★]

ラ: Apicomplexa
関: アピコンプレクサ、アピコンプレックス門、アピコンプレクサ類

「アピコンプレックス門」

　　[★]

ラ: Apicomplexa
関: アピコンプレクサ、アピコンプレックス、アピコンプレクサ類

「Sporozoa」

　　[★]

胞子虫類、胞子虫、胞子虫綱

関: Apicomplexa

[Levine1970-1] Levine ND (1970). Taxonomy of the Sporozoa. "Proceedings Of the Second International Congress of Parasitology". J Parasitol 56 (4, Sect. 2, Part 1: Suppl.): 208–9. JSTOR 3277701.

[2] Levine ND (May 1971). "Uniform Terminology for the Protozoan Subphylum Apicomplexa". J Eukaryot Microbiol 18 (2): 352–5. doi:10.1111/j.1550-7408.1971.tb03330.x.

[3] Jadwiga Grabda (1991). Marine fish parasitology: an outline. VCH. p. 8. ISBN 0-89573-823-6.

[4] "Introduction to the Apicomplexa". Archived from the original on 20 April 2009. Retrieved 2009-05-31.

[Morrison2009-5] Morrison DA (August 2009). "Evolution of the Apicomplexa: where are we now?". Trends Parasitol. 25 (8): 375–82. doi:10.1016/j.pt.2009.05.010. PMID 19635681.

[Templeton2010-6] Templeton TJ, Enomoto S, Chen WJ, et al. (February 2010). "A genome-sequence survey for Ascogregarina taiwanensis supports evolutionary affiliation but metabolic diversity between a Gregarine and Cryptosporidium". Mol. Biol. Evol. 27 (2): 235–48. doi:10.1093/molbev/msp226. PMC 2877549. PMID 19778951.

[Kuvardina2002-7] Kuvardina ON, Leander BS, Aleshin VV, Myl'nikov AP, Keeling PJ, Simdyanov TG (November 2002). "The phylogeny of colpodellids (Alveolata) using small subunit rRNA gene sequences suggests they are the free-living sister group to apicomplexans". J. Eukaryot. Microbiol. 49 (6): 498–504. doi:10.1111/j.1550-7408.2002.tb00235.x. PMID 12503687.

[Leander2002-8] Leander BS, Keeling PJ (August 2003). "Morphostasis in alveolate evolution". Trends Ecol Evol 18 (8): 395—402. doi:10.1016/S0169-5347(03)00152-6.

[Escalante1995-9] Escalante AA, Ayala FJ (June 1995). "Evolutionary origin of Plasmodium and other Apicomplexa based on rRNA genes". Proc. Natl. Acad. Sci. U.S.A. 92 (13): 5793–7. doi:10.1073/pnas.92.13.5793. PMC 41587. PMID 7597031.

[Kishore2013-10] Kishore SP, Stiller JW, Deitsch KW (2013). "Horizontal gene transfer of epigenetic machinery and evolution of parasitism in the malaria parasite Plasmodium falciparum and other apicomplexans". BMC Evol. Biol. 13: 37. doi:10.1186/1471-2148-13-37. PMC 3598677. PMID 23398820.

[coccidiaworld-11] Duszynski1, Donald W.; Upton, Steve J.; Couch, Lee (2004-02-21). "The Coccidia of the World" (Online database). Department of Biology, University of New Mexico, and Division of Biology, Kansas State University.

[12] Patrick J. Keeling (2004). "Diversity and evolutionary history of plastids and their hosts". American Journal of Botany 91 (10): 1481–1493. doi:10.3732/ajb.91.10.1481. PMID 21652304.

[13] Ram, Ev; Naik, R; Ganguli, M; Habib, S (July 2008). "DNA organization by the apicoplast-targeted bacterial histone-like protein of Plasmodium falciparum". Nucleic Acids Research 36 (15): 5061–73. doi:10.1093/nar/gkn483. PMC 2528193. PMID 18663012.

[14] "EuPathDB". Retrieved 2012-01-02.

[15] Bahl, A.; Brunk, B.; Crabtree, J.; Fraunholz, M. J.; Gajria, B.; Grant, G. R.; Ginsburg, H.; Gupta, D.; Kissinger, J. C.; Labo, P.; Li, L.; Mailman, M. D.; Milgram, A. J.; Pearson, D. S.; Roos, D. S.; Schug, J.; Stoeckert Jr, C. J.; Whetzel, P. (2003). "PlasmoDB: The Plasmodium genome resource. A database integrating experimental and computational data". Nucleic Acids Research 31 (1): 212–215. doi:10.1093/nar/gkg081. PMC 165528. PMID 12519984. edit

[16] "PlasmoDB". Retrieved 2012-01-02.

[17] Kissinger, J. C.; Gajria, B.; Li, L.; Paulsen, I. T.; Roos, D. S. (2003). "ToxoDB: Accessing the Toxoplasma gondii genome". Nucleic Acids Research 31 (1): 234–236. doi:10.1093/nar/gkg072. PMC 165519. PMID 12519989. edit

[18] "ToxoDB". Retrieved 2012-01-02.

[19] "PiroplasmaDB". Retrieved 2012-01-02.

[20] Heiges, M.; Wang, H.; Robinson, E.; Aurrecoechea, C.; Gao, X.; Kaluskar, N.; Rhodes, P.; Wang, S.; He, C. Z.; Su, Y.; Miller, J.; Kraemer, E.; Kissinger, J. C. (2006). "CryptoDB: A Cryptosporidium bioinformatics resource update". Nucleic Acids Research 34 (90001): D419–D422. doi:10.1093/nar/gkj078. PMC 1347441. PMID 16381902. edit

[21] "CryptoDB". Retrieved 2012-01-02.

[22] Dahl, El; Shock, Jl; Shenai, Br; Gut, J; Derisi, Jl; Rosenthal, Pj (September 2006). "Tetracyclines specifically target the apicoplast of the malaria parasite Plasmodium falciparum" (Free full text). Antimicrobial agents and chemotherapy 50 (9): 3124–31. doi:10.1128/AAC.00394-06. PMC 1563505. PMID 16940111.

[Euz.C3.A9by1988-23] Euzéby, J. (1988). Apicomplexa, 2: Hémosporidioses, Fascicule 1: Plasmodiidés, Haemoproteidés "Piroplasmes" (caractères généraux). Protozoologie Médicale Comparée 3. Fondation Marcel Merieux. ISBN 2901773737. OCLC 463445910.

[Martinsen2008-24] Martinsen ES, Perkins SL, Schall JJ (April 2008). "A three-genome phylogeny of malaria parasites (Plasmodium and closely related genera): evolution of life-history traits and host switches". Mol. Phylogenet. Evol. 47 (1): 261–73. doi:10.1016/j.ympev.2007.11.012. PMID 18248741.

[25] Roberts, L.; Janovy, J. (1996). Foundations of Parasitology (5th ed.). Dubuque IA: Wm. C. Brown. ISBN 0697260712. OCLC 33439613.

[Perkins2000-26] Perkins FO, Barta JR, Clopton RE, Peirce MA, Upton SJ (2000). "Phylum Apicomplexa". In Lee JJ, Leedale GF, Bradbury P. An Illustrated guide to the Protozoa : organisms traditionally referred to as protozoa, or newly discovered groups 1 (2nd ed.). Society of Protozoologists. pp. 190–369. ISBN 1891276220. OCLC 704052757.

[Krylov1992-27] Krylov MV (1992). "[The origin of heteroxeny in Sporozoa]". Parazitologia (in Russian) 26 (5): 361–8. PMID 1297964.

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Apicomplexa