Related Experiment Video
Updated: Jul 5, 2026

In Vitro Characterization of Histone Chaperones using Analytical, Pull-Down and Chaperoning Assays
Published on: December 29, 2021
Characterization of nucleohistone and nucleoprotamine components in the mature human sperm nucleus
Yan Li1, Claudia Lalancette, David Miller
1Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Wayne, MI 48201, USA.
Aim:
To simultaneously determine the localization of histones and protamines within human sperm nuclei.
Methods:
Immunofluorescence of the core histones and protamines and fluorescence in situ hybridization of the telomere region of chromosome 16 was assessed in decondensed human sperm nuclei.
Results:
Immunofluorescent localization of histones, protamine 1 (PRM1) and protamine 2 (PRM2) along with fluorescence in situ hybridization localization of chromosome 16 telomeric sequences revealed a discrete distribution in sperm nuclei. Histones localized to the posterior ring region (i.e. the sperm nuclear annulus), whereas PRM1 and PRM2 appeared to be dispersed throughout the entire nucleus.
Conclusion:
The co-localization of the human core sperm histones with the telomeric regions of chromosome 16 is consistent with the reorganization of specific non-protamine regions into a less compacted state.
Related Concept Videos
The Nucleosome Core Particle
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
The Nucleosome Core Particle
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The Nucleosome
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
The Nucleosome
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...
The Nucleosome
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
Chromatin Packaging

