Abstract:
:Computer-based approaches identified PTE2 as a candidate human peroxisomal acyl-CoA thioesterase gene. The PTE2 gene product is highly similar to the rat cytosolic and mitochondrial thioesterases, CTE1 and MTE1, respectively, and terminates in a tripeptide sequence, serine-lysine-valine(COOH), that resembles the consensus sequence for type-1 peroxisomal targeting signals. PTE2 was targeted to peroxisomes and recombinant PTE2 showed intrinsic acyl-CoA thioesterase activity with a pH optimum of 8.5. A comparison of PTE2 and PTE1 thioesterase activities across multiple acyl-CoA substrates indicated that while PTE1 was most active on medium-chain acyl-CoAs, with little activity on long-chain acyl-CoAs, PTE2 displayed high activity on medium- and long-chain acyl-CoAs. The identification of PTE2 therefore offers an explanation for the observed long-chain acyl-CoA thioesterase activity of mammalian peroxisomes.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Jones JM,Gould SJdoi
10.1006/bbrc.2000.3285subject
Has Abstractpub_date
2000-08-18 00:00:00pages
233-40issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(00)93285-6journal_volume
275pub_type
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