sub:provenance {
  beldoc: dce:description "Approximately 61,000 statements." ;
    dce:rights "Copyright (c) 2011-2012, Selventa. All rights reserved." ;
    dce:title "BEL Framework Large Corpus Document" ;
    pav:authoredBy sub:_5 ;
    pav:version "1.4" .
  sub:_4 prov:value "Loss of p27kip1 expression in cancer primarily occurs through sustained protein degradation, a four-step process that requires phosphorylation of p27kip1 at threonine 187 by cyclin E/cdk, recognition of T187-phosphorylated p27kip1 by the ubiquitin ligase SCFSkp2, ubiquitylation, and degradation by the 26S proteasome of T187-phosphorylated p27kip1. Cytoplasmic retention of p27kip1 may occur through increased export or reduced import. Interaction of p27kip1 with JAB1/CNS5 or phosphorylation of serine 10 (S10) by the hKIS kinase promotes p27kip1 export from the nucleus, whereas phosphorylation of threonine 157 (T157) by the protein kinase B/AKT (AKT) impairs its import." ;
    prov:wasQuotedFrom pubmed:15743786 .
  sub:_5 rdfs:label "Selventa" .
  sub:assertion prov:hadPrimarySource pubmed:15743786 ;
    prov:wasDerivedFrom beldoc: , sub:_4 .
}