Biology:Blastocrithidia

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Short description: Genus of parasitic flagellate protist in the Kinetoplastea class

Blastocrithidia
File:Blastocrithidia papi journal.pone.0204467.g003.tif
A species of Blastocrithidia, B. papi (vertical scale bar = 10 μm).[2]
Scientific classification e
Domain: Eukaryota
Phylum: Euglenozoa
Class: Kinetoplastea
Order: Trypanosomatida
Family: Trypanosomatidae
Genus: Blastocrithidia
Laird 1959 [1]
Type species
Blastocrithidia gerridis
(Patton 1908) Laird 1959
Species

See text

Blastocrithidia is a genus of parasitic flagellate protist belonging to the family Trypanosomatidae.[1] It is a monoxenous parasite of heteropteran insects,[3] mainly inhabiting their hindgut and glands.[4]

Characteristics

In addition to Blastocrithidia, one-host trypanosomatids from hemipteran and dipteran insects have been traditionally placed in genera Crithidia, Leptomonas, Herpetomonas, Rhynchoidomonas, and Wallaceina.[5][6] Blastocrithidia is characterized by epimastigote morphological forms, whereas opisthomastigotes and endomastigotes are exclusive features of the genera Herpetomonas and Wallaceina, respectively.[6] Blastocrithidia is also able to produce resistant cysts.[7]

Systematics

The etymology of the genus name Blastocrithidia derives from the two Ancient Greek words βλαστός (blastós), meaning "sprout, scion, child or descendant", and κριθίδιον (krithídion), meaning "small grain of barley".[8][9]

The genus includes the following species.

  • Blastocrithidia caliroae Lipa, Carl & Valentine 1977
  • Blastocrithidia cyrtomeni Caicedo et al. 2011
  • Blastocrithidia euschisti Hanson & McGhee
  • Blastocrithidia familiaris Tieszen et al. 1986
  • Blastocrithidia gerridis (Patton 1908) Laird 1959
  • Blastocrithidia largi Maslov and Lukes 2010
  • Blastocrithidia leptocoridis (McCulloch 1915)
  • Blastocrithidia miridarum Podlipaev & Frolov 1987
  • Blastocrithidia papi Frolov and Kostygov, 2016
  • Blastocrithidia raabei Lipa 1966
  • Blastocrithidia triatomae Cerisola et al. 1971
  • Blastocrithidia vagoi Tuzet & Laporte 1965
  • Blastocrithidia nonstop Votýpka & Lukeš, sp. nov.

Genomics

Genetic code

Blastocrithidia uses in its nuclear genome an alternative genetic code characterized by all three canonical stop codons reassigned to sense codons.[10]

Table of alternative codons in Blastocrithidia and comparison with the standard genetic code
Genetic code Translation
table		 DNA codon RNA codon Conditional
translation		 Standard translation
Blastocrithidia nuclear 31 TAA UAA Ter (*) or Glu (E) Ter (*)
TAG UAG Ter (*) or Glu (E) Ter (*)
TGA UGA Trp (W) Ter (*)
Amino acids biochemical properties nonpolar polar basic acidic Termination: stop codon

References

  1. ↑ 1.0 1.1 Laird, Marshall (1959-10-01). "Blastocrithidia n.g. (Mastigophora: Protomonadina) for Crithidia (in part), with a subarctic record for B. gerridis (Patton)". Canadian Journal of Zoology 37 (5): 749–752. doi:10.1139/z59-075. ISSN 0008-4301. 
  2. ↑ Frolov, Alexander O.; Malysheva, Marina N.; Ganyukova, Anna I.; Yurchenko, Vyacheslav; Kostygov, Alexei Y. (2018-09-27). "Obligate development of Blastocrithidia papi (Trypanosomatidae) in the Malpighian tubules of Pyrrhocoris apterus (Hemiptera) and coordination of host-parasite life cycles" (in en). PLOS ONE 13 (9): e0204467. doi:10.1371/journal.pone.0204467. ISSN 1932-6203. PMID 30261003. Bibcode: 2018PLoSO..1304467F. 
  3. ↑ Týč, Jiří; Votýpka, Jan; Klepetková, Helena; Šuláková, Hana; Jirků, Milan; Lukeš, Julius (2013-10-01). "Growing diversity of trypanosomatid parasites of flies (Diptera: Brachycera): Frequent cosmopolitism and moderate host specificity" (in en). Molecular Phylogenetics and Evolution 69 (1): 255–264. doi:10.1016/j.ympev.2013.05.024. ISSN 1055-7903. PMID 23747522. http://www.sciencedirect.com/science/article/pii/S1055790313002327. 
  4. ↑ Tanada, Yoshinori; Kaya, Harry K. (2012-12-02) (in en). Insect Pathology. Academic Press. p. 397. ISBN 978-0-08-092625-4. https://books.google.com/books?id=0QAl21IeeGgC&pg=PA397. 
  5. ↑ Merzlyak, Ekaterina; Yurchenko, Vyacheslav; Kolesnikov, Alexander A.; Alexandrov, Kirill; Podlipaev, Sergei A.; Maslov, Dmitri A. (2001-03-01). "Diversity and Phylogeny of Insect Trypanosomatids Based on Small Subunit rRNA Genes: Polyphyly of Leptomonas and Blastocrithidia" (in en). The Journal of Eukaryotic Microbiology 48 (2): 161–169. doi:10.1111/j.1550-7408.2001.tb00298.x. ISSN 1066-5234. PMID 12095103. 
  6. ↑ 6.0 6.1 Yurchenko, Vyacheslav Y.; Lukeš, Julius; Tesařová, Martina; Jirků, Milan; Maslov, Dmitri A. (2008-01-01). "Morphological Discordance of the New Trypanosomatid Species Phylogenetically Associated with the Genus Crithidia" (in en). Protist 159 (1): 99–114. doi:10.1016/j.protis.2007.07.003. PMID 17931968. 
  7. ↑ Tieszen, K.; Molyneux, D. H.; Abdel-Hafez, S. K. (1985-03-01). "Ultrastructure of cyst formation in Blastocrithidia familiaris in Lygaeus pandurus (Hemiptera: Lygaeidae)" (in en). Zeitschrift für Parasitenkunde 71 (2): 179–188. doi:10.1007/BF00926268. ISSN 1432-1955. 
  8. ↑ Bailly, Anatole (1981-01-01). Abrégé du dictionnaire grec français. Paris: Hachette. ISBN 978-2010035289. OCLC 461974285. 
  9. ↑ Bailly, Anatole. "Greek-french dictionary online". http://www.tabularium.be/bailly/. 
  10. ↑ Záhonová, Kristína; Kostygov, Alexei Y.; Ševčíková, Tereza; Yurchenko, Vyacheslav; Eliáš, Marek (2016). "An Unprecedented Non-canonical Nuclear Genetic Code with All Three Termination Codons Reassigned as Sense Codons". Current Biology 26 (17): 2364–2369. doi:10.1016/j.cub.2016.06.064. PMID 27593378. 

Wikidata ☰ Q9174253 entry



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