Partitiviridae. Partitiviridae

Description of Partitiviridae adapted from ICTVdb Virion Properties Morphology Virions consist of a capsid. Virus capsid is not enveloped, round with icosahedral symmetry. The nucleocapsid is isometric and has a diameter of 30-35 nm. The capsid consists of 12 capsomers. Virus preparations contain more than one particle component. Incomplete particles are common. They are devoid of nucleic acid characterized by capsids with dark centers in negative stain preparations. Nucleic Acid The Mr of the genome constitutes 9% of the virion by weight, or 16% of the virion by weight, or 25% of the virion by weight. The genome is segmented; multipartite and segments are distributed over several particles of varying size, depending on the length of the genome enclosed. The genome consists of two segments of, or three segments of, or four segments of linear, double -stranded RNA. Minor species of non-genomic nucleic acid are also found in virions. The encapsidated nucleic acid is mainly of genomic origin, but virions may also contain subgenomic RNA, or satellite RNA. The complete genome is 3000-10000 nucleotides long. Genome is sequenced, but only an estimate is available, complete sequence is 1300-2200 nucleotides long.   Is sequenced, complete sequence is about 1500-2200 nucleotides long, is sequenced, but only an estimate is given, complete sequence is 600-1500 nucleotides long (defective or subgenomic RNA). The multipartite genome is divided among more than one type of particle and the segments are distributed between at least 2-7 different types of particles (containing either a single molecule of dsRNA (L1, L2), or single molecule of ssRNA corresponding to the plus-strand (M1; M2) and a single molecule of dsRNA with ssRNA tails (H), or one molecule of dsRNA and ssRNA (H), or two molecules of dsRNA (P)). Populations of mature viruses contain particles with a single molecule of dsRNA (L1, L2), or a single molecule of ssRNA corresponding to the plus-strand (M1; M2) and a single molecule of dsRNA with ssRNA tails (H), or one molecule each of dsRNA and ssRNA (H), or two molecules of dsRNA (P). Each virion contains defective interfering copies. Proteins The viral genome encodes structural proteins. Virions consist of 1 structural protein(s). Lipids Lipids are not reported.

分病毒科（Partitiviridae）描述改编自国际病毒分类委员会数据库（ICTVdb）的病毒相关特性章节：

## 病毒粒子特性
病毒粒子由衣壳（capsid）构成，无包膜，呈圆形并具有二十面体对称。核衣壳（nucleocapsid）为等轴形态，直径30~35 nm。衣壳由12个壳粒（capsomers）组成。病毒制备物中存在多种粒子组分，缺损粒子较为常见：负染样品中可见衣壳中心呈深色的无核酸缺损粒子。

## 核酸特性
基因组的相对分子质量占病毒粒子总质量的比例分别为9%、16%或25%。基因组为分节段的多分体结构，节段分布于多种不同大小的粒子中，粒子尺寸取决于其所包裹的基因组片段长度。基因组包含2、3或4个线性双链RNA（double-stranded RNA，dsRNA）节段。
病毒粒子中还可检测到少量非基因组核酸。衣壳包裹的核酸主要为基因组来源，但病毒粒子也可能包含亚基因组RNA（subgenomic RNA）或卫星RNA（satellite RNA）。完整基因组总长3000~10000个核苷酸。
部分基因组已完成测序，但仅能获得估算值：完整序列长度为1300~2200个核苷酸；另有部分完整序列长度约1500~2200个核苷酸；还有部分仅获得估算值，完整序列长度为600~1500个核苷酸（对应缺损或亚基因组RNA）。
多分体基因组分布于多种不同类型的粒子中，节段至少分布于2~7种不同粒子中：这些粒子分别包含单分子双链RNA（L1、L2）、对应正链的单分子单链RNA（single-stranded RNA，ssRNA，M1、M2）与带单链RNA尾巴的单分子双链RNA（H）、各一分子双链RNA与单链RNA（H），或是两分子双链RNA（P）。
成熟病毒种群包含的粒子类型同上：分别含单分子dsRNA（L1、L2）、对应正链的单分子ssRNA与带ssRNA尾巴的单分子dsRNA（H）、各一分子dsRNA与ssRNA（H），或是两分子dsRNA（P）。每个病毒粒子均携带缺损干扰拷贝。

## 蛋白质特性
病毒基因组编码结构蛋白。病毒粒子仅含1种结构蛋白。

## 脂质特性
未检测到脂质组分。