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XB-ART-24272
Proc Natl Acad Sci U S A 1991 Dec 15;8824:11393-7.
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Prohormone processing in Xenopus oocytes: characterization of cleavage signals and cleavage enzymes.

Korner J , Chun J , O'Bryan L , Axel R .


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In this study, we characterize the sequences required for the cleavage of prohormones in Xenopus oocytes. We demonstrate that the yeast alpha-factor and the Aplysia egg-laying hormone (ELH) precursors are not cleaved in oocytes following simple pairs of basic residues, such as Lys-Arg, but that the ELH precursor is cleaved following the consensus sequence Arg-Xaa-(Lys/Arg)-Arg. This motif is conserved among precursors that are cleaved in virtually all mammalian cell types. Mutations that generate this sequence in the alpha-factor prohormone also result in efficient processing within oocytes. Cleavage at this consensus sequence may be due to the action of the Xenopus homologues of mammalian furin.

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Species referenced: Xenopus laevis
Genes referenced: furin

References [+] :
Benjannet, PC1 and PC2 are proprotein convertases capable of cleaving proopiomelanocortin at distinct pairs of basic residues. 1991, Pubmed