Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense
Trypanosoma brucei contain a serine oligopeptidase (OP-Tb) that is released into (and remains active in) the blood of trypanosome-infected animals. Here a similar enzyme from Trypanosoma congolense is described. This oligopeptidase, called OP-Tc, was purified using three-phase partitioning, and ion-exchange and affinity chromatography. OP-Tc is inhibited by alkylating agents, by serine peptidase-specific inhibitors including 3,4-dichloroisocoumarin, 4-(2-aminoethyl) benzenesulfonylfluoride and diispropylfluoro-phosphate and by other peptidase inhibitors including leupeptin, antipain and peptidyl chloromethyl ketones. Reducing agents such as dithiothreitol enhanced activity as did heparin, spermine and spermidine. The enzyme has trypsin-like specificity since it cleaved fluorogenic peptides that have basic amino acid residues (Arg or Lys) in the P1 position. Potential substrates without a basic residue in P1 were not hydrolysed. Although OP-Tc has weak arginine aminopeptidase activity, the enzyme clearly preferred substrates that had amino acids in the P2 and P3 positions. Overall, OP-Tc appears to be less efficient than OP-Tb because it usually displayed lower kcat/Km values for the substrates tested. However, like OP-Tb, the best substrate for OP-Tc was Cbz-Arg-Arg-AMC (Km = 0.72 µM, kcat = 96 s-1). OP-Tc: preference for amino acids in the P2 position was (Gly,Lys,Arg) > Phe > Leu > Pro. The results also suggest that the P3-binding site has hydrophobic characteristics. OP-Tc may not be a naturally immunodominant molecule because neither IgG nor IgM anti-OP-Tc antibodies were detected in the blood of experimentally infected cattle.
Main Authors: | , , , , |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | L73 - Maladies des animaux, Trypanosoma congolense, peptide, purification, http://aims.fao.org/aos/agrovoc/c_27401, http://aims.fao.org/aos/agrovoc/c_5691, http://aims.fao.org/aos/agrovoc/c_6377, |
Online Access: | http://agritrop.cirad.fr/510529/ http://agritrop.cirad.fr/510529/1/510529.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-cirad-fr-510529 |
---|---|
record_format |
koha |
spelling |
dig-cirad-fr-5105292024-01-28T10:50:35Z http://agritrop.cirad.fr/510529/ http://agritrop.cirad.fr/510529/ Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense. Morty Rory E., Authié Edith, Troeberg Linda, Lonsdale Eccles John D., Goetzer Theresa H.T.. 1999. Molecular and Biochemical Parasitology, 102 : 145-155.https://doi.org/10.1016/S0166-6851(99)00097-3 <https://doi.org/10.1016/S0166-6851(99)00097-3> Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense Morty, Rory E. Authié, Edith Troeberg, Linda Lonsdale Eccles, John D. Goetzer, Theresa H.T. eng 1999 Molecular and Biochemical Parasitology L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 Trypanosoma brucei contain a serine oligopeptidase (OP-Tb) that is released into (and remains active in) the blood of trypanosome-infected animals. Here a similar enzyme from Trypanosoma congolense is described. This oligopeptidase, called OP-Tc, was purified using three-phase partitioning, and ion-exchange and affinity chromatography. OP-Tc is inhibited by alkylating agents, by serine peptidase-specific inhibitors including 3,4-dichloroisocoumarin, 4-(2-aminoethyl) benzenesulfonylfluoride and diispropylfluoro-phosphate and by other peptidase inhibitors including leupeptin, antipain and peptidyl chloromethyl ketones. Reducing agents such as dithiothreitol enhanced activity as did heparin, spermine and spermidine. The enzyme has trypsin-like specificity since it cleaved fluorogenic peptides that have basic amino acid residues (Arg or Lys) in the P1 position. Potential substrates without a basic residue in P1 were not hydrolysed. Although OP-Tc has weak arginine aminopeptidase activity, the enzyme clearly preferred substrates that had amino acids in the P2 and P3 positions. Overall, OP-Tc appears to be less efficient than OP-Tb because it usually displayed lower kcat/Km values for the substrates tested. However, like OP-Tb, the best substrate for OP-Tc was Cbz-Arg-Arg-AMC (Km = 0.72 µM, kcat = 96 s-1). OP-Tc: preference for amino acids in the P2 position was (Gly,Lys,Arg) > Phe > Leu > Pro. The results also suggest that the P3-binding site has hydrophobic characteristics. OP-Tc may not be a naturally immunodominant molecule because neither IgG nor IgM anti-OP-Tc antibodies were detected in the blood of experimentally infected cattle. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/510529/1/510529.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/S0166-6851(99)00097-3 10.1016/S0166-6851(99)00097-3 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=175127 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0166-6851(99)00097-3 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/S0166-6851(99)00097-3 |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 |
spellingShingle |
L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 Morty, Rory E. Authié, Edith Troeberg, Linda Lonsdale Eccles, John D. Goetzer, Theresa H.T. Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
description |
Trypanosoma brucei contain a serine oligopeptidase (OP-Tb) that is released into (and remains active in) the blood of trypanosome-infected animals. Here a similar enzyme from Trypanosoma congolense is described. This oligopeptidase, called OP-Tc, was purified using three-phase partitioning, and ion-exchange and affinity chromatography. OP-Tc is inhibited by alkylating agents, by serine peptidase-specific inhibitors including 3,4-dichloroisocoumarin, 4-(2-aminoethyl) benzenesulfonylfluoride and diispropylfluoro-phosphate and by other peptidase inhibitors including leupeptin, antipain and peptidyl chloromethyl ketones. Reducing agents such as dithiothreitol enhanced activity as did heparin, spermine and spermidine. The enzyme has trypsin-like specificity since it cleaved fluorogenic peptides that have basic amino acid residues (Arg or Lys) in the P1 position. Potential substrates without a basic residue in P1 were not hydrolysed. Although OP-Tc has weak arginine aminopeptidase activity, the enzyme clearly preferred substrates that had amino acids in the P2 and P3 positions. Overall, OP-Tc appears to be less efficient than OP-Tb because it usually displayed lower kcat/Km values for the substrates tested. However, like OP-Tb, the best substrate for OP-Tc was Cbz-Arg-Arg-AMC (Km = 0.72 µM, kcat = 96 s-1). OP-Tc: preference for amino acids in the P2 position was (Gly,Lys,Arg) > Phe > Leu > Pro. The results also suggest that the P3-binding site has hydrophobic characteristics. OP-Tc may not be a naturally immunodominant molecule because neither IgG nor IgM anti-OP-Tc antibodies were detected in the blood of experimentally infected cattle. |
format |
article |
topic_facet |
L73 - Maladies des animaux Trypanosoma congolense peptide purification http://aims.fao.org/aos/agrovoc/c_27401 http://aims.fao.org/aos/agrovoc/c_5691 http://aims.fao.org/aos/agrovoc/c_6377 |
author |
Morty, Rory E. Authié, Edith Troeberg, Linda Lonsdale Eccles, John D. Goetzer, Theresa H.T. |
author_facet |
Morty, Rory E. Authié, Edith Troeberg, Linda Lonsdale Eccles, John D. Goetzer, Theresa H.T. |
author_sort |
Morty, Rory E. |
title |
Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
title_short |
Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
title_full |
Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
title_fullStr |
Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
title_full_unstemmed |
Purification and characterisation of a trypsin-like serine oligopeptidase from Trypanosoma congolense |
title_sort |
purification and characterisation of a trypsin-like serine oligopeptidase from trypanosoma congolense |
url |
http://agritrop.cirad.fr/510529/ http://agritrop.cirad.fr/510529/1/510529.pdf |
work_keys_str_mv |
AT mortyrorye purificationandcharacterisationofatrypsinlikeserineoligopeptidasefromtrypanosomacongolense AT authieedith purificationandcharacterisationofatrypsinlikeserineoligopeptidasefromtrypanosomacongolense AT troeberglinda purificationandcharacterisationofatrypsinlikeserineoligopeptidasefromtrypanosomacongolense AT lonsdaleecclesjohnd purificationandcharacterisationofatrypsinlikeserineoligopeptidasefromtrypanosomacongolense AT goetzertheresaht purificationandcharacterisationofatrypsinlikeserineoligopeptidasefromtrypanosomacongolense |
_version_ |
1792495389828448256 |