The pest regions containing C-termini of mammalian ornithine decarboxylase and histidine decarboxylase play different roles in protein degradation.
Proteasome 26S must recognize the PEST region-containing C-terminus of mammalian ornithine decarboxylase (ODC) monomer to proceed with degradation. We have detected PEST regions in both termini of mammalian histidine decarboxylase (HDC). In the present report, a chimaeric ODC/HDC was used to elucidate whether the PEST region-containing C-termini of ODC and HDC are exchangeable. Wild-type rat ODC had an expected antizyme and ATP-dependent degradation. This was not the case for both the chimaera and a C-terminus truncated rat ODC. Results suggest that the PEST region-containing C-terminus of rat HDC should have another role different to confering polypeptide availability to the proteasome.
Olmo
M T
MT
Facultad de Ciencias, Universidad de Málaga, Málaga, E-29071, Spain.
Rodríguez-Agudo
D
D
Medina
M A
MA
Sánchez-Jiménez
F
F
D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D004795:Enzyme Stability; D006207:Half-Life; D006640:Histidine Decarboxylase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D007700:Kinetics; D009955:Ornithine Decarboxylase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D010447:Peptide Hydrolases / Q000378:metabolism; D046988:Proteasome Endopeptidase Complex; D014176:Protein Biosynthesis; D011487:Protein Conformation; D051381:Rats; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017384:Sequence Deletion; D013329:Structure-Activity Relationship; D014158:Transcription, Genetic
D011993:Recombinant Fusion Proteins; D000255:Adenosine Triphosphate; D010447:Peptide Hydrolases; D046988:Proteasome Endopeptidase Complex; C061553:ATP dependent 26S protease; D009955:Ornithine Decarboxylase; D006640:Histidine Decarboxylase