Cloning and characterization of two maize cDNAs encoding Cinnamoyl-CoA Reductase (CCR) and differential expression of the corresponding genes

Cloning and characterization of two maize cDNAs encoding Cinnamoyl-CoA Reductase (CCR) and... Cinnamoyl-CoA Reductase (CCR, EC 1.2.1.44) catalyses the first step of the lignin pathway. Two full-length cDNAs identified by sequence analysis as CCR-encoding cDNAs were isolated from a maize root cDNA library. These two cDNAs designated ZmCCR1 and ZmCCR2 exhibit 73% sequence conservation at the nucleotide level for their coding regions and are relatively divergent at their 5′- and 3′-untranslated regions. They both contain a common signature which is thought to be involved in the catalytic site of CCR. Northern blot analysis indicated that ZmCCR2 was expressed at very low levels in roots whereas ZmCCR1 was widely expressed in different organs. The high level of ZmCCR1 gene expression along the stalk suggests that the corresponding enzyme is probably involved in constitutive lignification. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Cloning and characterization of two maize cDNAs encoding Cinnamoyl-CoA Reductase (CCR) and differential expression of the corresponding genes

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Publisher
Kluwer Academic Publishers
Copyright
Copyright © 1998 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1006060101866
Publisher site
See Article on Publisher Site

Abstract

Cinnamoyl-CoA Reductase (CCR, EC 1.2.1.44) catalyses the first step of the lignin pathway. Two full-length cDNAs identified by sequence analysis as CCR-encoding cDNAs were isolated from a maize root cDNA library. These two cDNAs designated ZmCCR1 and ZmCCR2 exhibit 73% sequence conservation at the nucleotide level for their coding regions and are relatively divergent at their 5′- and 3′-untranslated regions. They both contain a common signature which is thought to be involved in the catalytic site of CCR. Northern blot analysis indicated that ZmCCR2 was expressed at very low levels in roots whereas ZmCCR1 was widely expressed in different organs. The high level of ZmCCR1 gene expression along the stalk suggests that the corresponding enzyme is probably involved in constitutive lignification.

Journal

Plant Molecular BiologySpringer Journals

Published: Oct 6, 2004

References

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