H2BW1

Last update 08 May 2025

Basic Info

Synonyms

H2B histone family member W testis-specific, H2B.W histone 1, H2BFWT

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Introduction

Atypical histone H2B that can form nucleosomes structurally and dynamically indistinguishable from those containing conventional H2B. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling (PubMed:15475252, PubMed:16449661). However, unlike conventional H2B, does not recruit chromosome condensation factors and does not participate in the assembly of mitotic chromosomes (PubMed:16449661). May be important for telomere function and play a role in spermatogenesis (PubMed:16449661, PubMed:19583817).

100 Clinical Results associated with H2BW1

100 Translational Medicine associated with H2BW1

0 Patents (Medical) associated with H2BW1

Literatures (Medical) associated with H2BW1

01 Jan 2025·The World Journal of Men's Health

Adverse Effects of Nicotine on Human Sperm Nuclear Proteins

Review

Author: Tofighi Niaki, Maryam ; Firouzabadi, Amir Masoud ; Fesahat, Farzaneh ; Henkel, Ralf

The effects of smoking on human health have long been documented. However, only a few studies have highlighted the direct effects of nicotine on sperm function. Nicotine, as a chemical compound found in tobacco, has been shown to modulate different aspects of spermatogenesis and sperm functions. Nicotine can lead to a reduction in the number of sperm, their motility and functionality. It can change the molecular expressions involved in sperm function, including genes encoding sperm nuclear proteins. The most important nuclear proteins that play a critical role in sperm function are known as H2B histone family, member W, testis-specific (H2BFWT), transition protein 1 (TNP1), transition protein 2 (TNP2), protamine-1 (PRM1), and protamine-2 (PRM2). These proteins are involved in sperm chromatin condensation, which in turn affects fertilization and embryonic development. Any alteration in the expression of these genes due to nicotine exposure/usage may lead to adverse implications in couples' fertility and the health of future generations. Since research in this area is still relatively new, it underscores the importance of understanding the potential side effects of environmental factors such as nicotine on reproductive health.

28 Oct 2024·Nucleic Acids Research

Testis-specific H2B.W1 disrupts nucleosome integrity by reducing DNA–histone interactions

Article

Author: Nguyen, Thi Thuy ; Sun, Xulun ; Pang, Matthew Y H ; Ding, Dongbo ; Xu, Zhichun ; Deng, Mingxi ; Yan, Yan ; Zhai, Yuanliang ; Ishibashi, Toyotaka ; Zhang, Yingyi ; Liu, Yue

AbstractMultiple testis-specific histone variants are involved in the dynamic chromatin transitions during spermatogenesis. H2B.W1 (previously called H2BFWT) is an H2B variant specific to primate testis with hitherto unclear functions, although its single-nucleotide polymorphisms (SNPs) are closely associated with male non-obstructive infertility. Here, we found that H2B.W1 is only expressed in the mid-late spermatogonia stages, and H2B.W1 nucleosomes are defined by a more flexible structure originating from weakened interactions between histones and DNA. Furthermore, one of its SNPs, H2B.W1-H100R, which is associated with infertility, further destabilizes the nucleosomes and increases the nucleosome unwrapping rate by interfering with the R100 and H4 K91/R92 interaction. Our results suggest that destabilizing H2B.W1 containing nucleosomes might change the chromatin structure of spermatogonia, and that H2B.W1-H100R enhances the nucleosome-destabilizing effects, leading to infertility.

01 Dec 2022·Andrologia

Impact of tobacco smoking in association with H2BFWT , PRM1 and PRM2 genes variants on male infertility

Article

Author: Hammadeh, Mohamad Eid ; Dahadhah, Fatina W. ; Amor, Houda ; Al Zoubi, Mazhar Salim ; Jankowski, Peter Michael

Tobacco's genotoxic components can cause a wide range of gene defects in spermatozoa such as single- or double-strand DNA breaks, cross-links, DNA-adducts, higher frequencies of aneuploidy and chromosomal abnormalities. The aim in this study was to determine the correlation between sperm quality determined by standard parameters, sperm DNA maturity tested by Chromomycin A3 (CMA3) staining, sperm DNA fragmentation tested by TUNEL assay and tobacco smoking in association with the single nucleotides polymorphisms (SNP) of three nuclear protein genes in spermatozoa (H2BFWT, PRM1 and PRM2). In this study, semen samples of 167 male patients were collected and divided into 54 non-smokers and 113 smokers. The target sequences in the extracted sperm DNA were amplified by PCR followed by Sanger sequencing. The results showed the presence of three variants: rs7885967, rs553509 and rs578953 in H2BFWT gene in the study population. Only one variant rs737008 was detected in PRM1 gene, and three variants were detected in the PRM2 gene: rs2070923, rs1646022 and rs424908. No significant association was observed between the concentration, progressive motility, morphology and the occurrence of H2BFWT, PRM1 and PRM2 SNPs. However, sperm parameters were significantly lower in heavy smokers compared to controls (p < 0.01) (sperm count: 46.00 vs. 78.50 mill/ml, progressive motility: 15.00% vs. 22.00%, and morphology 4.00% vs. 5.00%, respectively). Moreover, the heavy smoker individuals exhibited a considerable increase in CMA3 positivity and sDF compared to non-smokers (p < 0.01) (29.50% vs. 20.50% and 24.50% vs. 12.00%, respectively). In conclusion, smoking altered sperm parameters and sperm DNA integrity, but did not show a linkage with genetic variants in H2BFWT, and protamine genes (PRM1 and PRM2).

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H2BW1

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