The @entity70378 isoforms are located in the outer envelope membrane of plastids. In @entity3587 , @entity70378 functions as a @entity3007 dependent receptor for preproteins, which is controlled by protein phosphorylation. Two members of this family are present in @entity958 , namely, @entity70378 and @entity70379 . @entity70379 is phosphorylated, as is the homologue in @entity3587 , while @entity70378 is not. The phosphorylation of @entity70379 occurs on @entity563 181. The highest affinity for dimerization was for the heterodimer between @entity70379 and @entity70378 in the absence of @entity3007 or @entity3006 . Both proteins, @entity70379 and @entity70378 , bind @entity3007 with significantly higher affinity than @entity3006 and are able to hydrolyze @entity3007 . The intrinsic @entity3007 hydrolysis rate of both proteins is comparable. Hydrolysis is strongly stimulated in the presence of preproteins, which are in turn released upon @entity3007 hydrolysis. Preprotein subclasses exist, which show a strong preference for either the @entity70379 or the @entity70378 receptor as revealed by @entity3007 hydrolysis rate stimulation and receptor precursor dissociation constants. Detailed analysis of precursor recognition supports the model of a @entity3007 hydrolysis regulated receptor ligand interaction.

Two XXXX homologues with different properties.

@entity3007 :: ('MESH:D006160', 'Chemical') :: ['GTP'] @entity958 :: ('3702', 'Species') :: ['Arabidopsis thaliana'] @entity70378 :: ('830382(Tax:3702)', 'Gene') :: ['Toc34', 'atToc34'] @entity3006 :: ('MESH:D006153', 'Chemical') :: ['GDP'] @entity563 :: ('CHEBI:17822', 'Chemical') :: ['serine'] @entity70379 :: ('839248(Tax:3702)', 'Gene') :: ['atToc33', 'AtToc33', 'Toc33'] @entity3587 :: ('3888', 'Species') :: ['P. sativum', 'pea']
@entity70378 :: (830382(Tax:3702),Gene) :: ['Toc34']
