欢迎访问《中国农学通报》,

中国农学通报 ›› 2023, Vol. 39 ›› Issue (28): 151-157.doi: 10.11924/j.issn.1000-6850.casb2022-0812

• 水产·渔业 • 上一篇    下一篇

马氏珠母贝组蛋白H2分子进化及功能分析

张明1(), 杨帅1, 曹艳飞1, 卢晓文1, 焦钰1,2()   

  1. 1 广东海洋大学水产学院,广东湛江 524088
    2 广东省珍珠养殖与加工工程技术研究中心,广东湛江 524088
  • 收稿日期:2022-09-26 修回日期:2022-12-28 出版日期:2023-10-05 发布日期:2023-09-25
  • 通讯作者: 焦钰,女,1981年出生,山东枣庄人,教授,博士,研究方向:海产无脊椎动物生物学及增养殖技术。通信地址:524088 广东省湛江市麻章区海大路1号 广东海洋大学水产学院,Tel:0759-2383346,E-mail:jiaoyu1981@hotmail.com。
  • 作者简介:

    张明,女,1995年出生,山东菏泽人,硕士,研究方向:珍珠培育与加工。通信地址:524088 广东省湛江市麻章区海大路1号 广东海洋大学水产学院,Tel:0759-2383346,E-mail:

  • 基金资助:
    广东省自然科学基金项目“重复基因nAChR亚基在马氏珠母贝移植免疫中的功能分化及表达调控机制”(2021A1515011199); 广东省教育厅普通高校特色创新项目“DNA甲基化在马氏珠母贝移植免疫中的调控机制”(2021KTSCX041)

Molecular Evolution and Functional Analysis of Histone H2 from Pinctada fucata martensii

ZHANG Ming1(), YANG Shuai1, CAO Yanfei1, LU Xiaowen1, JIAO Yu1,2()   

  1. 1 Fisheries College, Guangdong Ocean University, Zhanjiang, Guangdong 524088
    2 Pearl Breeding and Processing Engineering Technology Research Centre of Guangdong Province, Zhanjiang, Guangdong 524088
  • Received:2022-09-26 Revised:2022-12-28 Published-:2023-10-05 Online:2023-09-25

摘要:

分析马氏珠母贝组蛋白H2的分子进化特征,及其在马氏珠母植核免疫调控中的作用,为进一步阐述组蛋白H2在马氏珠母贝中的生理功能提供理论基础。应用生物信息学分析方法对马氏珠母贝(Pinctada fucata martensi)、人(Homo sapiens)、长牡蛎(Crassostrea gigas)等9个物种中的组蛋白H2A和H2B进行全基因组鉴定,并分析了它们的分子进化历程;利用课题组已有数据,分析组蛋白H2A和H2B在马氏珠母贝发育、组织和植核免疫中的功能。通过比较基因组分析发现,人的基因组中含有27个组蛋白H2A、20个组蛋白H2B,长牡蛎基因组中含有12个组蛋白H2A、8个组蛋白H2B,马氏珠母贝基因组中仅含有2个H2AH2A-1H2A-2)、1个H2B,与其他物种相比呈现收缩现象。序列比对分析发现,人的基因组中有6个H2A变体和2个H2B变体,牡蛎有3个H2A变体和1个H2B变体,马氏珠母贝中有1个H2A变异体(H2A-2)。在马氏珠母贝中,植核后H2A-1H2B的表达发生了不同程度的变化,说明它们参与植核免疫调控;基因H2A-1在原肠胚期表达量较高,H2A-2在担轮幼虫和D型幼虫中的表达量较高,H2B发育前期表达量较高。H2A-1在珍珠囊中表达量较高,H2A-2在血细胞、足和外套膜套膜区表达量相对较高,H2B在性腺和珍珠囊中表达量较高。马氏珠母贝基因组中仅含有2个组蛋白H2基因,它们参与调控植核免疫且在免疫调控过程中发挥的作用不同。

关键词: 马氏珠母贝, 组蛋白H2, 软体动物, 进化

Abstract:

The aim of this research was to investigate the molecular evolutionary characteristics of histone H2 and its role in the immune regulation in pearl oyster Pinctada fucata martensii, and to provide a theoretical basis for further elucidation of the physiological functions of histone H2 in Pinctada fucata martensii. Bioinformatics methods were used to identify histone H2A and H2B from nine species, such as Pinctada fucata martensii, Homo sapiens, and Crassostrea gigas, and their molecular evolution was analyzed. Using the data available in our previous research, the functions of histone H2A and H2B in the development, tissue and immunity of Pinctada fucata martensii were also analyzed. The main results showed that the human genome contained 27 histone H2A and 20 histone H2B, the C. gigas genome contained 12 histone H2A and 8 histone H2B, and the genome of Pinctada fucata martensii contained only two H2A (H2A-1 and H2A-2) and one H2B, which showed a contraction phenomenon compared with other species. Sequence analysis revealed that there were 6 H2A and 2 H2B variants in human genome, 3 H2A and 1 H2B variants in C. gigas, and 1 H2A variant (H2A-2) in Pinctada fucata martensii. The expression of H2A-1 and H2B were changed after transplantation in Pinctada fucata martensii, indicating that they were involved in the immunological regulation of the transplantation immune response. The expression level of H2A-1 gene was higher in the gastrula stage, H2A-2 was highly expressed in trochophore stage and type D larvae, and the expression level of H2B was higher in the egg and fertilized egg. H2A-1 was relatively high in pearl sac, the expression level of H2A-2 was relatively high in blood cell, foot, and mantle pallium, and H2B gene was relatively high in gonad and pearl sac. The genome of pearl oyster Pinctada fucata martensii contained only two H2 genes, and both of them involved and played a different role in the regulation of transplantation immune response in Pinctada fucata martensii.

Key words: Pinctada fucata martensii, histone H2, mollusk, evolution