H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine
A plasma membrane H+-glycyl-L-proline (Gly-L-Pro) cotransport mechanism has been identified in isolated eel intestinal brush-border membrane vesicles (BBMV) by both measuring radiolabeled Gly-L-Pro uptake and monitoring Gly-L-Pro-dependent H+ influx with the pH-sensitive dye acridine orange. The app...
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1997
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ftunivsalento:oai:iris.unisalento.it:11587/103989 2024-04-21T07:45:37+00:00 H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine MAFFIA, Michele VERRI, Tiziano STORELLI, Carlo A. DANIELI M. THAMOTHARAN M. PASTORE G. A. AHEARN Maffia, Michele Verri, Tiziano A., Danieli M., Thamotharan M., Pastore G. A., Ahearn Storelli, Carlo 1997 STAMPA http://hdl.handle.net/11587/103989 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:A1997WG56500029 volume:272 firstpage:R217 lastpage:R225 numberofpages:9 journal:AMERICAN JOURNAL OF PHYSIOLOGY. REGULATORY, INTEGRATIVE AND COMPARATIVE PHYSIOLOGY http://hdl.handle.net/11587/103989 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0031025833 Peptide transport teleost intestinal physiology membrane transport info:eu-repo/semantics/article 1997 ftunivsalento 2024-03-28T01:39:35Z A plasma membrane H+-glycyl-L-proline (Gly-L-Pro) cotransport mechanism has been identified in isolated eel intestinal brush-border membrane vesicles (BBMV) by both measuring radiolabeled Gly-L-Pro uptake and monitoring Gly-L-Pro-dependent H+ influx with the pH-sensitive dye acridine orange. The application of an inside negative membrane potential resulted in increasing Gly-L-Pro uptake, as well as the application of inwardly directed H+ gradient (although only when an inside negative membrane potential was present). Furthermore, vesicular H+ influx was found specifically associated with the presence of Gly-L-Pro in the extravesicular medium. The carrier-mediated nature of H+-Gly-L-Pro cotransport was assessed, and its concentration that yielded one-half maximal Gly-L-Pro influx was similar to 1.30 mM when measured by either radioactive or fluorescent tracers. Different dipeptides strongly inhibited Gly-L-Pro uptake by eel intestinal BBMV, as well as the cephalosporin antibiotic cephalexin, suggesting that dipeptide molecules and cephalosporin antibiotics may share a common transport system in eel intestinal BBMV. Article in Journal/Newspaper Anguilla anguilla Università del Salento: CINECA IRIS |
institution |
Open Polar |
collection |
Università del Salento: CINECA IRIS |
op_collection_id |
ftunivsalento |
language |
English |
topic |
Peptide transport teleost intestinal physiology membrane transport |
spellingShingle |
Peptide transport teleost intestinal physiology membrane transport MAFFIA, Michele VERRI, Tiziano STORELLI, Carlo A. DANIELI M. THAMOTHARAN M. PASTORE G. A. AHEARN H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
topic_facet |
Peptide transport teleost intestinal physiology membrane transport |
description |
A plasma membrane H+-glycyl-L-proline (Gly-L-Pro) cotransport mechanism has been identified in isolated eel intestinal brush-border membrane vesicles (BBMV) by both measuring radiolabeled Gly-L-Pro uptake and monitoring Gly-L-Pro-dependent H+ influx with the pH-sensitive dye acridine orange. The application of an inside negative membrane potential resulted in increasing Gly-L-Pro uptake, as well as the application of inwardly directed H+ gradient (although only when an inside negative membrane potential was present). Furthermore, vesicular H+ influx was found specifically associated with the presence of Gly-L-Pro in the extravesicular medium. The carrier-mediated nature of H+-Gly-L-Pro cotransport was assessed, and its concentration that yielded one-half maximal Gly-L-Pro influx was similar to 1.30 mM when measured by either radioactive or fluorescent tracers. Different dipeptides strongly inhibited Gly-L-Pro uptake by eel intestinal BBMV, as well as the cephalosporin antibiotic cephalexin, suggesting that dipeptide molecules and cephalosporin antibiotics may share a common transport system in eel intestinal BBMV. |
author2 |
Maffia, Michele Verri, Tiziano A., Danieli M., Thamotharan M., Pastore G. A., Ahearn Storelli, Carlo |
format |
Article in Journal/Newspaper |
author |
MAFFIA, Michele VERRI, Tiziano STORELLI, Carlo A. DANIELI M. THAMOTHARAN M. PASTORE G. A. AHEARN |
author_facet |
MAFFIA, Michele VERRI, Tiziano STORELLI, Carlo A. DANIELI M. THAMOTHARAN M. PASTORE G. A. AHEARN |
author_sort |
MAFFIA, Michele |
title |
H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
title_short |
H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
title_full |
H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
title_fullStr |
H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
title_full_unstemmed |
H+/glycyl-L-proline cotransport in brush border membrane vesicles of eel (Anguilla anguilla) intestine |
title_sort |
h+/glycyl-l-proline cotransport in brush border membrane vesicles of eel (anguilla anguilla) intestine |
publishDate |
1997 |
url |
http://hdl.handle.net/11587/103989 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:A1997WG56500029 volume:272 firstpage:R217 lastpage:R225 numberofpages:9 journal:AMERICAN JOURNAL OF PHYSIOLOGY. REGULATORY, INTEGRATIVE AND COMPARATIVE PHYSIOLOGY http://hdl.handle.net/11587/103989 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0031025833 |
_version_ |
1796940987309752320 |