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. 1998 May;37(2):235-41.
doi: 10.1023/a:1005948406131.

Abundance of mRNAs encoding HMG1/HMG2 class high-mobility-group DNA-binding proteins are differentially regulated in cotyledons of Pharbitis nil

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Abundance of mRNAs encoding HMG1/HMG2 class high-mobility-group DNA-binding proteins are differentially regulated in cotyledons of Pharbitis nil

S D O'Neill et al. Plant Mol Biol. 1998 May.

Abstract

The abundance of an mRNA encoding an HMG 1/2 protein from Pharbitis nil (HMG1) has been previously shown to be regulated by light and an endogenous rhythm in cotyledons. A second Pharbitis nil HMG cDNA (HMG2) was characterized. The sequence of HMG2 was 82% and 86% identical to HMG1 at the nucleotide and amino acid level, respectively. As with HMG1, HMG2 mRNA was detected in all vegetative tissues and was most abundant in roots. However, unlike HMG1, HMG2 mRNA abundance did not increase upon transfer of cotyledons to darkness and did not exhibit regulation by an endogenous circadian rhythm when maintained in continuous darkness over a 68 h period. Similarly, while the abundance of HMG1 mRNA during a dark period that induced photoperiodically controlled flowering was dramatically affected by brief light exposure (night break), this treatment had no effect on HMG2 mRNA abundance. Collectively, these data are consistent with a role of HMG1 in contributing to the circadian-regulated and/or dark-regulated gene expression with constitutive expression of HMG2 playing a housekeeping role in the general regulation of gene expression in Pharbitis nil cotyledons.

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References

    1. Gene. 1997 May 6;190(2):303-7 - PubMed
    1. EMBO J. 1988 Dec 1;7(12):3635-42 - PubMed
    1. Nucleic Acids Res. 1991 May 25;19(10):2573-7 - PubMed
    1. Biochim Biophys Acta. 1990 Jul 30;1049(3):231-43 - PubMed
    1. Nucleic Acids Res. 1991 Sep 11;19(17):4769 - PubMed

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