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dc.contributor.authorRibes, Enric
dc.contributor.authorCheema, M
dc.contributor.authorGonzalez Romero, R.
dc.contributor.authorLLORIS, D.
dc.contributor.authorAusió, Juan
dc.contributor.authorSaperas Plana, Núria
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2015-12-09T11:23:19Z
dc.date.available2016-02-08T01:31:24Z
dc.date.issued2015-08-01
dc.identifier.citationRibes, E., Cheema, M., Gonzalez, R., LLORIS, D., Ausió, J., Saperas, N. Spermiogenesis and biflagellate spermatozoon of the teleost fish Lampanyctus crocodilus (Myctophiformes, Myctophidae): ultrastructure and characterisation of its sperm basic nuclear proteins. "Cell and tissue research", 01 Agost 2015, vol. 361, núm. 2, p. 619-632.
dc.identifier.issn0302-766X
dc.identifier.urihttp://hdl.handle.net/2117/80299
dc.description.abstractWe undertook an ultrastructural study of the spermiogenesis of the lanternfish Lampanyctus crocodilus (Myctophiformes, Myctophidae) with special emphasis on the condensation of chromatin and the biochemical characterisation of its spermnuclear basic proteins (SNBPs). The round head of the early spermatid of L. crocodilus develops into a curved conical-shaped head in the spermatozoon. Two flagella, present even in the spermatid, are inserted laterally at the convex side of the sperm head. Both flagella possess an axoneme with a 9 + 0 instead of the typical 9 + 2 axonemal structure. Mitochondria undergo a characteristic redistribution during spermiogenesis. A reduced number of them are present lying away from the centrioles at both ends of the concave side of the sperm head. During the chromatin condensation stages in spermiogenesis, fibrogranular structures with granules of 25 +/- 5 and 50 +/- 5 nm can be observed in the early spermatid and develop into larger granules of about 150 +/- 50 nm in the middle spermatid. The latter granules coalesce during the transition to the advanced spermatid and spermatozoon giving rise to highly condensed chromatin in the sperm cell. Protamines are the main SNBPs associated with this chromatin; however, they are unusually large and correspond to the largest protamines described in fish to date. Small stoichiometric amounts of histones and other basic proteins coexist with these protamines in the spermatozoon.
dc.format.extent14 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshSpermiogenesis in animals
dc.subject.otherBiflagellate sperm
dc.subject.otherFish spermiogenesis
dc.subject.otherSperm nuclear basic proteins
dc.subject.otherMyctophiformes
dc.subject.otherLampanyctus
dc.subject.otherworm chaetopterus-variopedatus
dc.subject.otherchromatin condensation
dc.subject.othercardinal fish
dc.subject.otherbony fish
dc.subject.otherprotamines
dc.subject.otherhistone
dc.subject.otherevolution
dc.subject.othersequence
dc.subject.othertransitions
dc.subject.otherapogonidae
dc.titleSpermiogenesis and biflagellate spermatozoon of the teleost fish Lampanyctus crocodilus (Myctophiformes, Myctophidae): ultrastructure and characterisation of its sperm basic nuclear proteins
dc.typeArticle
dc.subject.lemacPeixos -- Espermatozoides
dc.contributor.groupUniversitat Politècnica de Catalunya. MACROM - Cristal·lografia, Estructura i Funció de Macromolècules Biològiques
dc.identifier.doi10.1007/s00441-015-2119-6
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs00441-015-2119-6
dc.rights.accessOpen Access
drac.iddocument16843218
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MICINN/6PN/BFU2009-10380
upcommons.citation.authorRibes, E., Cheema, M., Gonzalez, R., LLORIS, D., Ausió, J., Saperas, N.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameCell and tissue research
upcommons.citation.volume361
upcommons.citation.number2
upcommons.citation.startingPage619
upcommons.citation.endingPage632


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