1 U corresponds to the amount of enzyme which hydrolyzes 1 μmol Pyroglutamate-p-nitroanilide per minute at pH 7.0 and 37 °C
Analysis Note
enzyme activity: the optimum temperature is 95-100 °C (the enzyme is stable up to 75 °C), the optimum pH is 6-9 (stable from pH 6-9). Inhibitors: PCMB, Hg+.
Other Notes
An enzyme that removes pyroglutamic acid (pGlu) from pGlu-peptide and proteins[1][2]; employed in Edman degradation.[3][4]
For larger proteins, efficient deblocking prior to Edman sequencing is especially important to obtain quality, extended sequencing data which is limited by the stepwise accumulation of background from the random acid hydrolysis of the protein. Therefore, any portion that remains
Journal of biochemistry, 106(3), 383-388 (1989-09-01)
The cDNA clone of Geotrichum candidum (Geo.) lipase was isolated from the Geo. cDNA library by colony hybridization using 32P-labeled oligonucleotides corresponding to a partial amino acid sequence of this enzyme. The nucleotide sequence of the cDNA determined by the
Pyrrolidone carboxyl peptidases (PCPs) from hyperthermophiles have a structurally conserved and completely buried Glu192 in the hydrophobic core; in contrast, the corresponding residue in the mesophile protein is a hydrophobic residue, Ile. Does the buried ionizable residue contribute to stabilization
Prolyl endopeptidase and pyroglutamyl peptidase I are enzymes which participate in the degradation of thyrotropin-releasing hormone (TRH), a hormone which is thought to play an important role in the development of organs and tissues. Here, we have characterized the ontogeny
Biochimica et biophysica acta, 1764(11), 1735-1740 (2006-10-20)
To enable Edman sequencing of pyroglutamylated immunoglobulins, enzymatic deblocking by pyroglutamate aminopeptidase is performed, often with variable yield and compromised solubility. Recently, enzymatic deblocking of immunoglobulins without denaturation was described. Although the conditions ensured efficient removal of pyroglutamyl residues, we
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