About: Stress Fiber Formation Pathway     Goto   Sponge   NotDistinct   Permalink

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AttributesValues
rdf:type
rdfs:label
  • Stress Fiber Formation Pathway
rdfs:subClassOf
Semantic_Type
  • Functional Concept
Preferred_Name
  • Stress Fiber Formation Pathway
UMLS_CUI
  • C1514990
BioCarta_ID
  • h_akap13Pathway
ALT_DEFINITION
  • The A-kinase anchor protein 13 (AKAP13, also known as AKAP-LBC) is one of a group of structurally diverse proteins, which have the common function of binding to the regulatory subunit of protein kinase A (PKA) and confining the holoenzyme to discrete locations within the cell. AKAP13 is a splice variant of the oncogene Lbc. Alternative splicing of the AKAP13 gene results in at least 3 transcript variants encoding different isoforms containing a Dbl oncogene homology (DH) domain and a pleckstrin homology (PH) domain. The DH domain is associated with guanine nucleotide exchange activation for the Rho/Rac family of small GTP binding proteins, resulting in the conversion of the inactive GTPase to the active form capable of transducing signals. The PH domain has multiple functions. These splice variants contain a fragment that was originally identified as Ht31 (See Carr et al 1991) which acts as a scaffolding protein to regulate the Rho signaling pathway and as protein kinase A-anchoring protein creating a coordination of these two signaling pathways. Diviani et al. found that in HEK293 cells LPA induced stimulation preferentially activates AKAP13 via G-alpha12. As yet targets for the anchored PKA have not been identified. AKAP13 and Rho do not appear to be phosphorylated by PKA. Diviani et al also found that the Lbc oncogene and protooncogene splice variant show higher activation and stress fiber localization. This appears to be a result of the presence of N terminal inhibitory sequences. A similar model of regulation has been proposed for Dbl and Vav.BIOCARTA
Legacy_Concept_Name
  • Stress_Fiber_Formation_Pathway
FULL_SYN
  • Rho-Selective Guanine Exchange Factor AKAP13 Mediates Stress Fiber FormationPTBIOCARTA
  • Stress Fiber Formation PathwayPTNCI
code
  • C38978
is someValuesFrom of
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