Sequence variants of chicken linker histone H1.a

The FEBS Journal
E Górnicka-MichalskaK Cywa-Benko

Abstract

Two allelic isoforms (H1.a1 and H1.a2) of histone H1.a were identified within two conservative flocks (R11 and R55) of Rhode Island Red chickens. These proteins form three phenotypes: a1, a2 and a1a2. Birds with phenotype a1 were most common (frequency 0.825-0.980) while the a1a2 chickens appeared relatively rarely (0.017-0.175). The third phenotype a2, not detected in the tested populations, has only been revealed in progeny of the purpose-mated a1a2 birds. The polymorphism of histone H1.a was observed in all examined chicken tissues, so that the H1 preparations isolated from the lung, spleen, kidney and testis from the same individual exhibited identical phenotypes (a1, a2, or a1a2). This finding, together with inheritance data, supports the genetic nature of the H1.a polymorphism. As indicated by cleavages with alpha-chymotrypsin and protease V8, the H1.a1 and H1.a2 are two highly related proteins which differ within N-terminal part of their C-terminal tails. Only a single nonconservative amino acid substitution between both H1.a allelic isoforms was detected by Edman degradation: glutamic acid present at position 117 in histone H1.a1 was replaced by lysine in histone H1.a2. Furthermore, using microsequencing techniques we h...Continue Reading

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Citations

Jun 4, 2011·Genetics and Molecular Biology·Andrzej KowalskiMarek Adamski
Jan 26, 2011·Comptes rendus biologies·Andrzej KowalskiEwa Górnicka-Michalska
Oct 19, 2012·Cell Biology International·Andrzej Kowalski, Jan Pałyga
Feb 20, 2014·Cellular & Molecular Biology Letters·Ewa Górnicka-MichalskaJan Pałyga
Jul 15, 2016·Biology of the Cell·Andrzej Kowalski, Jan Pałyga

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