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NTR1 encodes a high affinity oligopeptide transporter in Arabidopsis
Author(s) -
Rentsch Doris,
Laloi Maryse,
Rouhara Ila,
Schmelzer Elmon,
Delrot Serge,
Frommer Wolf B.
Publication year - 1995
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(95)00853-2
Subject(s) - oligopeptide , arabidopsis , transporter , mutant , biochemistry , biology , yeast , complementation , chemistry , microbiology and biotechnology , gene , peptide
Heterologous complementation of yeast mutants has enabled the isolation of genes encoding several families of amino acid transporters. Among them, NTR1 codes for a membrane protein with weak histidine transport activity. However at the sequence level, NTR1 is related to rather non‐specific oligopeptide transporters from a variety of species including Arabidopsis and to the Arabidopsis nitrate transporter CHL1. A yeast mutant deficient in oligopeptide transport was constructed allowing to show that NTR1 functions as a high affinity, low specificity peptide transporter. In siliques NTR1 ‐expression is restricted to the embryo, implicating a role in the nourishment of the developing seed.