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dc.contributor.authorButnev, Viktor Y.en_US
dc.contributor.authorGotschall, R. Russellen_US
dc.contributor.authorButnev, Vladimir Y.en_US
dc.contributor.authorBaker, Vanda L.en_US
dc.contributor.authorMoore, William T.en_US
dc.contributor.authorBousfield, George R.en_US
dc.identifierHD 29047en_US
dc.identifier.citationBiology of reproduction. 1998 Feb; 58(2): 458-69.en_US
dc.descriptionClick on the link below to access the article (may not be free).
dc.description.abstractHybrid hormones were created using combinations of equine (e) LH, eFSH, and eCG alpha- and beta-subunit preparations. The efficiency of eFSH beta association was highest with eLH alpha (64-72%) and was lowest with eCG alpha (37-50%). Selective removal of alphaAsn56 oligosaccharide increased heterodimerization efficiency by 9-20% for eLH alpha, by 21-28% for eFSH alpha, and by 28-41% for eCG alpha. Both alpha and beta subunits contributed significantly to FSH receptor-binding activities of the hybrids. Purified hybrid hormone preparations consisting of either eFSH beta or eLH beta combined with eLH alpha, eFSH alpha, or eCG alpha were prepared. Equine FSH beta hybrids were more active in the FSH radioreceptor assay than eLH beta hybrids; within each beta-subunit group the eLH alpha hybrids were the most active, followed by eFSH alpha hybrids, while the least active were eCG alpha hybrids. A truncated, des(121-149) eLH beta derivative (eLH beta t) combined with native alpha-subunit preparations exhibited the same effect of alpha-subunit type on FSH receptor binding. Hybrids combining the eLH beta t derivative with Asn56-deglycosylated (N56dg-)eLH alpha, N56dg-eFSH alpha, and N56dg-eCG alpha preparations possessed 2.2- to 4.3-fold increased FSH receptor-binding activities as compared with the same hybrid preparations possessing the Asn56 carbohydrate. Granulosa cell bioassay of purified native eFSH beta and eLH beta hybrid hormones indicated no significant effect of the alpha-subunit carbohydrate differences on progesterone production. The alpha-subunit Asn56 oligosaccharide exerts a hormone-specific inhibitory influence on in vitro subunit reassociation and FSH receptor binding related to the size of its Man(alpha1-6)Man antenna.en_US
dc.description.sponsorshipNICHD NIH HHSen_US
dc.publisherSociety for the Study of Reproductionen_US
dc.relation.ispartofseriesBiology of reproductionen_US
dc.subjectResearch Support, Non-U.S. Gov'ten_US
dc.subjectResearch Support, U.S. Gov't, P.H.S.en_US
dc.subject.meshChromatography, Gelen_US
dc.subject.meshElectrophoresis, Polyacrylamide Gelen_US
dc.subject.meshFollicle Stimulating Hormone/metabolismen_US
dc.subject.meshGlycoprotein Hormones, alpha Subunit/geneticsen_US
dc.subject.meshGonadotropins, Equine/metabolismen_US
dc.subject.meshGranulosa Cells/drug effectsen_US
dc.subject.meshHybridization, Geneticen_US
dc.subject.meshLuteinizing Hormone/metabolismen_US
dc.subject.meshOligosaccharides/chemical synthesisen_US
dc.subject.meshReceptors, FSH/geneticsen_US
dc.subject.meshSpecies Specificityen_US
dc.subject.meshSpectrometry, Mass, Matrix-Assisted Laser Desorption-Ionizationen_US
dc.subject.meshGranulosa Cells/metabolismen_US
dc.subject.meshReceptors, FSH/metabolismen_US
dc.titleHormone-specific inhibitory influence of alpha-subunit Asn56 oligosaccharide on in vitro subunit association and follicle-stimulating hormone receptor binding of equine gonadotropinsen_US
dc.description.versionpeer revieweden_US

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