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- _6 label "Selventa" provenance.
- large_corpus.bel rights "Copyright (c) 2011-2012, Selventa. All rights reserved." provenance.
- _5 value "Effect of Ser371 on S6K1 Activation-- As shown previously (13), substitution of an alanine or an aspartate for Ser371 blocks serum- or insulin-induced Thr389 phosphorylation and S6K1 activation (Fig. 6A). However, substitution of an acidic residue at Thr389 in the S6K1-E389D3E background fails to rescue kinase activity (13), suggesting that Ser371 phosphorylation contributes directly to S6K1 activation independent of its role in regulating Thr389 phosphorylation. To test this possibility in vitro, either S6K1 or S6K1-S371A, from 293 cells pretreated with rapamycin, were incubated with either HA-mTOR-WT or HA-mTOR-KI. Both S6K1 variants displayed basal levels of phosphorylated Thr229, which were not altered by incubation with either mTOR variant (Fig. 6B). However, incubation of either S6 kinase variant with wild type, but not kinase-inactive, mTOR led to increased Thr389 phosphorylation, with the extent of Thr389 phosphorylation much higher in S6K1-S371A than in wild type S6K1 (Fig. 6B). However, to achieve the same level of activity as S6K1-WT, S6K1-S371A apparently requires much higher levels of Thr389 phosphorylation (Fig. 6B), consistent with detailed titration studies (data not shown). Although unexpected, these findings are compatible with Ser371 phosphorylation regulating Thr389 phosphorylation and with its ability to directly affect S6K1 activity. (From full text)" provenance.
- _5 wasQuotedFrom 11914378 provenance.
- assertion hadPrimarySource 11914378 provenance.
- large_corpus.bel title "BEL Framework Large Corpus Document" provenance.
- large_corpus.bel description "Approximately 61,000 statements." provenance.
- assertion wasDerivedFrom _5 provenance.
- assertion wasDerivedFrom large_corpus.bel provenance.
- large_corpus.bel authoredBy _6 provenance.
- large_corpus.bel version "20131211" provenance.