HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Arwood, L. J. Articles by Spiker, S. Search for Related Content PubMed PubMed Citation Articles by Arwood, L. J. Articles by Spiker, S. Social Bookmarking                      What's this?

J. Biol. Chem., Vol. 265, Issue 17, 9771-9777, Jun, 1990

Binding of wheat and chicken high mobility group chromosomal proteins to DNA and to wheat and chicken mononucleosomes

LJ Arwood and S Spiker
Department of Genetics, North Carolina State University, Raleigh 27695- 7614.

We have used an electrophoretic retardation assay to investigate the interactions of wheat high mobility group (HMG) proteins with DNA and with isolated trimmed mononucleosomes (complexes which contain a histone octamer and approximately 146 base pairs of DNA). In order to characterize these interactions, we have compared the binding of each of the wheat HMG proteins, HMGa, b, c, and d, with those of the low molecular weight chicken HMG proteins HMG14 and 17. These vertebrate animal HMG proteins have previously been shown to occupy two specific binding sites on animal nucleosomes and to have a greater affinity for nucleosomes than for naked DNA (Mardian, J. K. W., Paton, A. E., Bunick, G. J., and Olins, D. E. (1980) Science 209, 1534-1536; Sandeen, G., Wood, W. I., and Felsenfeld, G. (1980) Nucleic Acids Res. 8, 3757- 3778). As a criterion for "specific binding," we have used the property of HMG14 and 17 binding of causing a discontinuous shift of nucleosomes to a distinct band of lower electrophoretic mobility. According to this criterion, wheat HMGb, c, and d do not bind nucleosomes specifically. These HMG proteins have approximately the same affinity for nucleosomes and naked DNA. Wheat HMGa does bind nucleosomes specifically by this criterion, but other aspects of the binding are reminiscent of histone H1-nucleosome binding. We present evidence that trimmed mononucleosomes of wheat are conformationally distinct from their animal counterparts. Despite the conformational differences, competition studies indicate that chicken and wheat mononucleosomes have essentially identical affinity for the low molecular weight animal HMG proteins.
CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?

This article has been cited by other articles:

				D. Launholt, T. Merkle, A. Houben, A. Schulz, and K. D. Grasser Arabidopsis Chromatin-Associated HMGA and HMGB Use Different Nuclear Targeting Signals and Display Highly Dynamic Localization within the Nucleus PLANT CELL, November 1, 2006; 18(11): 2904 - 2918. [Abstract] [Full Text] [PDF]

				KlausD. Grasser, R. Grimm, and C. Ritt Maize Chromosomal HMGc. TWO CLOSELY RELATED STRUCTURE-SPECIFIC DNA-BINDING PROTEINS SPECIFY A SECOND TYPE OF PLANT HIGH MOBILITY GROUP BOX PROTEIN J. Biol. Chem., December 20, 1996; 271(51): 32900 - 32906. [Abstract] [Full Text] [PDF]