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Laboraverum News, 2024-09-18: How did an ancient photosynthesis molecule get from cyanobacteria to our eyes?
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المحتوى المقدم من Eduard Kanalosh. يتم تحميل جميع محتويات البودكاست بما في ذلك الحلقات والرسومات وأوصاف البودكاست وتقديمها مباشرة بواسطة Eduard Kanalosh أو شريك منصة البودكاست الخاص بهم. إذا كنت تعتقد أن شخصًا ما يستخدم عملك المحمي بحقوق الطبع والنشر دون إذنك، فيمكنك اتباع العملية الموضحة هنا https://ar.player.fm/legal.
We are talking about the protein that is responsible for our vision, the protein that captures photons in the retina of our eye and triggers sending a signal to our brain to create a visual image there. The molecule is called Retinal. When bound to supporting proteins it is called Opsin or Rhodopsin depending on where it is located. And it is vision. Literally!
This molecule arose in ancient cyanobacteria at the dawn of evolution and was responsible for photosynthesis in most living organisms about 3 billion years ago. Retinal survived by migrating to animals and continuing to do what it did 3 billion years ago - capture photons and convert their energy into a chemical modification of surrounding molecules.
There is a lot of indirect evidence that it happened through horizontal gene shift. A recent study, however, has proven it directly.
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