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Corticotropin-Releasing Hormone (CRH) gene family duplications in Lampreys correlate with two early vertebrate genome doublings

2020Journal article Open access
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dc.contributor.authorCardoso, João CR
dc.contributor.authorBergqvist, Christina A.
dc.contributor.authorLarhammar, Dan
dc.date.accessioned2020-09-18T10:12:23Z
dc.date.available2020-09-18T10:12:23Z
dc.date.issued2020
dc.description.abstractThe ancestor of gnathostomes (jawed vertebrates) is generally considered to have undergone two rounds of whole genome duplication (WGD). The timing of these WGD events relative to the divergence of the closest relatives of the gnathostomes, the cyclostomes, has remained contentious. Lampreys and hagfishes are extant cyclostomes whose gene families can shed light on the relationship between the WGDs and the cyclostome-gnathostome divergence. Previously, we have characterized in detail the evolution of the gnathostome corticotropin-releasing hormone (CRH) family and found that its five members arose from two ancestral genes that existed before the WGDs. The two WGDs resulted, after secondary losses, in one triplet consisting of CRH1, CRH2, and UCN1, and one pair consisting of UCN2 and UCN3. All five genes exist in representatives for cartilaginous fishes, ray-finned fishes, and lobe-finned fishes. Differential losses have occurred in some lineages. We present here analyses of CRH-family members in lamprey and hagfish by comparing sequences and gene synteny with gnathostomes. We found five CRH-family genes in each of two lamprey species (Petromyzon marinus and Lethenteron camtschaticum) and two genes in a hagfish (Eptatretus burgeri). Synteny analyses show that all five lamprey CRH-family genes have similar chromosomal neighbors as the gnathostome genes. The most parsimonious explanation is that the lamprey CRH-family genes are orthologs of the five gnathostome genes and thus arose in the same chromosome duplications. This suggests that lampreys and gnathostomes share the same two WGD events and that these took place before the lamprey-gnathostome divergence.pt_PT
dc.description.sponsorshipPortuguese Foundation for Science and Technology: UIDB/04326/2020pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fnins.2020.00672pt_PT
dc.identifier.issn1662-453X
dc.identifier.urihttp://hdl.handle.net/10400.1/14732
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectGene duplicationpt_PT
dc.subjectLampreypt_PT
dc.subjectTetraploidizationpt_PT
dc.subjectParalogonpt_PT
dc.subjectCRHpt_PT
dc.titleCorticotropin-Releasing Hormone (CRH) gene family duplications in Lampreys correlate with two early vertebrate genome doublingspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage672pt_PT
oaire.citation.titleFrontiers in Neurosciencept_PT
oaire.citation.volume14pt_PT
person.familyNameCardoso
person.givenNameJoão
person.identifier14332
person.identifier.ciencia-id8B16-F203-2AFC
person.identifier.orcid0000-0001-7890-0170
person.identifier.ridM-4151-2013
person.identifier.scopus-author-id7201822956
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication1b670c84-15e3-4776-8871-50f9eb0eed0d
relation.isAuthorOfPublication.latestForDiscovery1b670c84-15e3-4776-8871-50f9eb0eed0d

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