Rhodopsin, also known as visual purple, is a protein encoded by the RHO gene [5] and a G-protein-coupled receptor (GPCR). It is a light -sensitive receptor protein that triggers visual phototransduction in rod cells .

视紫红质（rhodopsin）是 一种 结合蛋白，由 视黄醛 （也称网膜素，retinal）和 视蛋白 （opsin）结合而成。 视黄醛由 维生素A 氧化而形成，是维生素A的醛化合物。 视黄醛有多个 同分异构体 （此处主要为两个），在视紫红质内与视蛋白结合的为分子构象较为卷曲的一种，即11-顺视黄醛（11-cisretinal）；在光照下它即转变为构象较直的全- 反视黄醛 （all-trans retinal）。

Rhodopsin, pigment-containing sensory protein that converts light into an electrical signal. Rhodopsin is found in a wide range of organisms, from vertebrates to bacteria. In many seeing animals, including humans, it is required for vision in dim light and is located in the retina of the

2012年1月23日 · Rhodopsin, a visual pigment found in the rod photoreceptor cells of the retina, is responsible for converting photons into chemical signals that stimulate biological processes in the nervous...

视紫质[1] （英語： rhodopsin）也称 视紫红质 、 視紫蛋白[2] 、 视紫素[3] 、 视网膜紫质[4][5]，是大多数 脊椎动物 视网膜 视桿细胞 中亮紫红色的光敏 视色素，其由 视蛋白 和11-顺 视黄醛 辅基 结合而成，最大光吸收在500nm附近，可将所吸收的 光信号 转化为 跨膜电信号，其光电响应是 视觉 形成的最初阶段。 视紫质属于 G蛋白偶联受体 （GPCR）的一种。 當视紫质暴露在光線下時，會立即 光漂白。 在人體中，它會在大約30分鐘內完全还原，之後， 視杆 就會變得更加敏感。 …

2013年12月23日 · Rhodopsins found in Eukaryotes, Bacteria, and Archaea consist of opsin apoproteins and a covalently linked retinal which is employed to absorb photons for energy conversion or the initiation of intra- or intercellular signaling. (1) Both functions are important for organisms to survive and to adapt to the environment.

Rhodopsin is synthesized in the endoplasmic reticulum and passes to the Golgi membranes where it becomes glycosylated. Rhodopsin-containing vesicles move from the Golgi to the outer segment where they fuse with the outer segment plasma membrane.

The microbial rhodopsin family is comprised of >7000 photochemically reactive proteins in prokaryotes and lower eukaryotes found throughout the oceans from tropical to arctic, lakes and rivers, soil, and on the leaf surfaces of plants .

2018年6月20日 · Our findings reveal a previously unknown family of light-sensing rhodopsins that are widespread in the microbial world. The light-driven functions of rhodopsins comprise four categories: (i) ion...

Rhodopsin is the vertebrate visual protein of rod cells which is responsible for dim light vision. Rhodopsin consists of a protein chain, opsin (M r ≃ 38,000), to which a molecule of 11-cis retinal is bound. In the first event in vision, rhodopsin absorbs a photon causing a change in the structure or electronic state of the 11-cis retinal ...