Interaction of rat testis protein, TP, with nucleosome core particle

Singh, J.; Rao, M.R.

Biochemistry International 17(4): 701-710

1988


ISSN/ISBN: 0158-5231
PMID: 3240317
Document Number: 321192
Circular dichroism studies have revealed that addition of testis specific protein, TP in vitro to rat testes nucleosome core particle resulted in a decrease in the compaction of the core particle DNA. This was also corroborated by thermal denaturation analysis. Addition of TP to nucleosome core particle resulted in the conversion of a biphasic transition towards a single phase. However, at the same time there was a 20% reduction in the overall hyperchromicity of core particle DNA at core particle to TP molar ratios of 1:2 and 1:3. These observations along with our earlier report, showing the DNA melting properties of TP, suggest that TP may play an important role in the disassembly process of nucleosome core particle during spermiogenesis.

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