SYCP3-like X-linked 2 is expressed in meiotic germ cells and interacts with synaptonemal complex central element protein 2 and histone acetyltransferase TIP60

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• 作者：Yu-Qiang Shi ; Xin-Jie Zhuang ; Bo Xu ; Juan Hua ; Shang-Ying Liao ; Qinghua Shi ; Howard J. Cooke ; Chunsheng Han
• 关键词：SYCP3 ; synaptonemal complex protein 3 ; SLX2 ; SYCP3-like X-linked 2 ; SYCE2 ; synaptonemal complex central element protein 2 ; TIP60 ; histone acetyltransferase Tip60 ; ¦ÃH2AX ; phosphorylated histone H2AX ; Xlr ; X-linked lymphocyte regulated ; Xmr ; Xlr-related me
• 刊名：Gene
• 出版年：2013
• 出版时间：15 September, 2013
• 年：2013
• 卷：527
• 期：1
• 页码：352-359
• 全文大小：1149 K

文摘

Meiosis is the process by which diploid germ cells produce haploid gametes. A key event is the formation of the synaptonemal complex. In the pachytene stage, the unpaired regions of X and Y chromosomes form a specialized structure, the XY body, within which gene expression is mostly silenced. In the present study, we showed that SYCP3-like X-linked 2 (SLX2, 1700013H16Rik), a novel member of XLR (X-linked Lymphocyte-Regulated) family, was specifically expressed in meiotic germ cells. In the spermatocyte SLX2 was distributed in the nucleus of germ cells at the preleptotene, leptotene and zygotene stages and is then restricted to the XY body at the pachytene stage. This localization change is coincident with that of phosphorylated histone H2AX (¦ÃH2AX), a well-known component of the sex body. Through yeast two-hybrid screening and coimmunoprecipitation assays, we demonstrated that SLX2 interacts with synaptonemal complex central element protein 2 (SYCE2), an important component of synaptonemal complex, and histone acetyltransferase TIP60, which has been implicated in remodeling phospho-H2AX-containing nucleosomes at sites of DNA damage. These results suggest that SLX2 might be involved in DNA recombination, synaptonemal complex formation as well as sex body maintenance during meiosis.