Porphyropsin
| Porphyropsin ( Carassius auratus ) | ||
|---|---|---|
| Mass / length primary structure | 354 amino acids | |
| Secondary to quaternary structure | PR | |
| Cofactor | 11- cis -3-retinal, 11- cis -3,4-dehydroretinal |
|
| Identifier | ||
| Gene name (s) | rho | |
| External IDs | ||
| Occurrence | ||
| Parent taxon | Bilateral animals (opsine) | |
Porphyropsin refers to certain visual pigments in some bilateral animals . The retina can have different cofactors in the opsin of rod installed to provide a complete visual pigment manufacture. It so happens that in freshwater fish and many amphibians partially 11- cis -3,4-dehydroretinal in place of 11- cis -retinal one is used, depending on the type enzyme ( retinal 3,4-dehydrogenase ). This pigment, called porphyropsin, has a different range of sensitivity compared to rhodopsin .
In this context, the term stands for the connection of a scotopsin with 3,4-dehydro-11- cis -retinal, or retinal 2 for short. A chemically clearly distinguishable structure, the connection of L-photopsin with 11- cis -retinal, or retinal for short 1, is also called porphyropsin by many specialist authors. In these two different meanings, porphyropsin refers to the visual pigment as a whole and not just its protein content. The article Opsin contains a rough overview of the most common terms that end in the word -opsin .
3,4-dehydroretinal has also been detected in invertebrates .
literature
- Reuter TE, White RH, Wald G .: Rhodopsin and porphyropsin fields in the adult bullfrog retina . (PDF, 1.18 MB) In: J. Gen. Physiol . 58, No. 4, October 1971, pp. 351-371. PMID 5315587 .
Individual evidence
- ↑ Search result UniProt Opsins by Taxonomy
- ↑ George Wald (1939): The Porphyropsin Visual System. In: The Journal of General Physiology . Vol. 22, pp. 775-794. PDF
- ^ Andrew TC Tsin & Janie M. Flores (1985): The in vivo Regeneration of Goldfish Rhodopsin and Porphyropsin. In: J. Exp. Biol. Vol. 122, pp. 269-275. PMID 3723071 PDF
- ↑ Zeiger J, Goldsmith TH: Spectral properties of porphyropsin from an invertebrate . In: Vision Res. . 29, No. 5, 1989, pp. 519-27. PMID 2603389 .