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应用生物信息学分析方法,预测到中国牙鲆淋巴囊肿病毒分离株(LCDV-cn)的lcn140基因编码锌指蛋白.为了进一步研究lcn140基因的功能,本文对lcn140基因进行了原核表达与结构分析.首先将lcn140基因克隆到pET24a(+)原核载体,再以E.coli BL21(DE3)为宿主菌表达目的蛋白;通过生物信息学软件分析,了解其结构与序列特征.结果表明,lcn140基因在原核载体中得到成功表达,表达的his标签融合蛋白主要以包涵体形式存在;在结构和序列方面,lcn140基因编码C3H1型锌指蛋白,其含有4个C3H1锌指结构和4段简单重复序列.该结果为LCDV-cn的发生、发展提供了分子基础. 相似文献
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Defensin is one of preserved ancient host defensive materials formed in biological evolution. As a regulator and effector molecule, it is very important in animals' acquired immune system. This paper reports the defensin gene from the mixed liver and kidney cDNA library of abalone Haliotis discus hannai Ino. Sequence analysis shows that the gene sequence of full-length cDNA encodes 42 mature peptides (including six Cys), molecular weight of 4 323 Da, and pI of 8.02. Amino acid sequence homology analysis shows that the peptides are highly similar (70% in common) to other insects defensin. Because of a typical insect-defensin structural character of mature peptide in the secondary structure, the polypeptide named Haliotis discus defensin (hd-def), a novel of antimicrobial peptides, belongs to insects defensin subfamily. The RT-PCR result of Haliotis discus defensin shows that the gene can be expressed only in the hepatopancreas by Gram-negative and positive bacteria stimulation, which is ascribed to inducible expression. Therefore, it is revealed that the Haliotis discus defensin gene expression was related to the antibacterial infection of Haliotis discus hannai Ino. 相似文献
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棕囊藻渤海株核糖体18S rDNA和ITS基因结构序列分析 总被引：5，自引：0，他引：5
对分离自渤海赤潮发生区的1株棕囊藻进行核糖体18S rDNA及ITS序列克隆测定,获得了长度为1 648 bp的18S rDNA序列和长度为890 bp的ITS序列.对获得的基因序列进行同源性分析,结果表明,该棕囊藻的核糖体18S rDNA及ITS序列均与NCBI数据库中登录的球形棕囊藻的相应序列同源性最高;从GenBank中获取不同地理来源的19种棕囊藻的18S rDNA序列及6种棕囊藻的ITS序列,分别以棕囊藻核糖体18S rDNA和ITS为对象构建了棕囊藻属的系统发育树,从分子生物学角度确定了棕囊藻渤海株为球形棕囊藻(Phaeocystis globosa). 相似文献
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An open reading frame (lcn61) of iymphocystis disease virus China (LCDV-cn), probably responsible for encoding putative zinc-finger proteins was amplified and inserted into pET24a (+) vector.Then it expressed in E. coli BL21 (DE3), and His-tag fusion protein of high yield was obtained. It was found that the fusion protein existed in E. coli mainly as inclusion bodies. The bioinformatics analysis indicates that LCN61 is C2H2 type zinc-finger protein containing four C2H2 zinc-finger motifs. This work provides a theory for functional research of lcn61 gene. 相似文献
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中国对虾人工越冬期经常会发生一种危害极大的纤毛虫病．１９８６年我们在河北省唐海县十里海养殖场越冬对虾体内发现了该纤毛虫并在实验室内进行了研究．几年来，青岛海洋大学、水科院黄海所都对该纤毛虫进行了研究，通常鉴定认为是一种应毛蟹栖拟阿脑虫（Ｐａｒａｎｏｐｈｒｇｓｃａｒｃｉｎｉｓｐｉｒａｌｉｓｎ．ｓｕｂｓｐ以下简称拟阿脑虫）．本研究与同类研究的区别在于探索比较了几种人工培养方法；对拟阿脑虫的生存温度与增殖进行了研究；提出了多种药物的药敏试验结果． 相似文献
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对虾越冬期蟹栖拟阿脑虫病的研究 总被引：2，自引：0，他引：2
中国对虾人工越冬期经常会发生一种危害极大的纤毛虫病，１９８６年我们在河北省唐海县十里海养殖场越冬对虾体内发现了该纤毛虫并在实验室内进行了研究，几年来，青岛海洋大学，水科院黄海所都对该纤毛虫进行了研究，通常鉴定认为是一种旋毛蟹栖拟阿脑虫本研究与同类研究的区别在于探索比较了几种人工培养方法，对拟阿脑虫的生存温度与增殖进行了研究提出了多种药物的药敏试验结果。 相似文献
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对中国对虾卵巢和受精卵细胞进行了电子显微镜超微结构观察，发现卵巢内有球状病毒粒子，大小为80nm左右。受精卵细胞内有传染性皮下和造血组织坏死病毒（IHHNV）感染，其严重影响对虾受精卵的发育，从获得的结果来看，中国对虾病毒（IHHNV）垂直传播的可能性极大。 相似文献
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Chinese and Japanese population of Chlamys farreri and their reciprocal hybrids were surveyed in isozyme variability at 13 loci by polyacrytamide gel electrophoresis (PAGE). Isozyme banding patterns indicated these hybrids were diploid. Loci that were observed as being monomorphic in inbred populations of C. farreri were also found to be monomorphic in filial progeny; loci that observed to be polymorphic in parental type generations were also polymorphic in hybrid generations. Differences existed among allelic frequency of the four types of cross. Within the reciprocal hybrids the expression of malic enzyme (ME) isozyme was sufficient to distinguishing individual hybrids because of the band, Rf=0.38. However, there were no noticeable variations among all the samples to differentiate one from another. Inbreeding was likely to be the main problem in aquaculture. The introduction of new broodstock can improve the genetic diversity. Hybrid vigor has manifested to a certain extent in the present study. 相似文献