Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

The Nicotiana tabacum plasma membrane aquaporin NtAQP1 is mercury‐insensitive and permeable for glycerol

The Nicotiana tabacum plasma membrane aquaporin NtAQP1 is mercury‐insensitive and permeable for... A new aquaporin from Nicotiana tabacum (cv. Samsun) was characterized. It shares sequence homology to the Arabidopsis thaliana PIP1 protein family. By two‐phase partitioning and immunoblot analysis, plasma membrane localization could be demonstrated. The corresponding mRNA is highly abundant in roots and flowers, while it is rarely expressed in leaves and stems. Functional expression in Xenopus oocytes revealed that NtAQP1 can mediate glycerol transport in addition to water flow. However, NtAQP1 is impermeable for Na + , K + and Cl – ions. The water permeability and selectivity could not be modulated by addition of mercurials or the activity of cAMP‐dependent protein kinases. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Plant Journal Wiley

The Nicotiana tabacum plasma membrane aquaporin NtAQP1 is mercury‐insensitive and permeable for glycerol

Loading next page...
 
/lp/wiley/the-nicotiana-tabacum-plasma-membrane-aquaporin-ntaqp1-is-mercury-CkORtZgfjs

References (33)

Publisher
Wiley
Copyright
Copyright © 1999 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0960-7412
eISSN
1365-313X
DOI
10.1046/j.1365-313X.1999.00474.x
Publisher site
See Article on Publisher Site

Abstract

A new aquaporin from Nicotiana tabacum (cv. Samsun) was characterized. It shares sequence homology to the Arabidopsis thaliana PIP1 protein family. By two‐phase partitioning and immunoblot analysis, plasma membrane localization could be demonstrated. The corresponding mRNA is highly abundant in roots and flowers, while it is rarely expressed in leaves and stems. Functional expression in Xenopus oocytes revealed that NtAQP1 can mediate glycerol transport in addition to water flow. However, NtAQP1 is impermeable for Na + , K + and Cl – ions. The water permeability and selectivity could not be modulated by addition of mercurials or the activity of cAMP‐dependent protein kinases.

Journal

The Plant JournalWiley

Published: Jun 1, 1999

There are no references for this article.