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核糖

核糖[1]
IUPAC名
(3R,4S,5R)-5-(Hydroxymethyl)tetrahydrofuran-2,3,4-triol
识别
CAS号 50-69-1  checkY
PubChem 5779
5311110(aldehydo form D-(−)-Ribose)
SMILES
 
  • C([C@@H]1[C@H]([C@H](C(O1)O)O)O)O
DrugBank DB01936
性质
化学式 C5H10O5
摩尔质量 150.13 g·mol⁻¹
外观 白色固体
熔点 99 °C(372 K)
溶解性 非常易溶
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

核糖(英语:Ribose)是一种五碳醛糖(戊醛糖),一般常见的型态为D-核糖。是RNA的组成物之一,也是ATPNADH等生化代谢所需分子的原料。

构象

DNA中的核糖是D-核糖,为呋喃型环状结构,该呋喃环状为β构型。[2]由于糖环中5个键均可转动,导致环中各个原子均有不同程度的相对偏离,核糖环不呈一个平面,其中C1'-O4'-C4'这3个原子通常在同一个平面上,而C2'和C3'原子偏离平面,这种偏离使核糖环具有不同的构象,以C5'作为参照来命名核糖环的各种构象。如果C2'或C3'偏离平面的方向与C5'同向,则称为内式(endo)构象,与C5'反向则为外式(exo)构象。[3]

参见

参考文献

  1. ^ Merck Index, 11th Edition, 8205.
  2. ^ 生物化学 第三版上册 王镜岩等主编
  3. ^ 结构分子生物学 刘次全等编著

外部链接

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核糖
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