HOME >> BIOLOGY >> NEWS
Insight into our sight: A new view on the evolution of the eye lens

The evolution of complex and physiologically remarkable structures such as the vertebrate eye has long been a focus of intrigue and theorizing by biologists. In work reported this week in Current Biology, the evolutionary history of a critical eye protein has revealed a previously unrecognized relationship between certain components of vertebrate eyes and those of the more primitive light-sensing systems of invertebrates. The findings help clarify our conceptual framework for understanding how the vertebrate eye, as we know it, has emerged over evolutionary time.

The work is reported by Sebastian Shimeld at the University of Oxford and colleagues at the University of London and Radboud University in The Netherlands.

Our sight relies on the ability of our eye to form a clear, focused image on the retina. The critical component in focusing is the eye lens, and the physical properties that underlie the transparency of the lens, as well as its ability to precisely refract light, arise from the high concentrations of special proteins called crystallins found in lens cells.

Fish, frogs, birds and mammals all experience image-forming vision, thanks to the fact that their eyes all express crystallins and form a lens; however, the vertebrates' nearest invertebrate relatives, such as sea squirts, have only simple eyes that detect light but are incapable of forming an image. This has lead to the view that the lens evolved within the vertebrates early in vertebrate evolution, and it raises a long-standing question in evolutionary biology: How could a complex organ with such special physical properties have evolved?

In their new work, Shimeld and colleagues approached this question by examining the evolutionary origin of one crystallin protein family, known as the ?-crystallins. Focusing on sea squirts, invertebrate cousins of the vertebrate lineage, the researchers found that these creatures possess a single crystallin gene, which is expressed in
'"/>

Contact: Heidi Hardman
hhardman@cell.com
1-617-397-2879
Cell Press
22-Sep-2005


Page: 1 2

Related biology news :

1. Insights into osteosarcoma in cats and dogs may improve palliative care
2. Insight into evolution of adaptive immunity boosted by sea urchin genome sequencing
3. Insights into honey bee sex gene could bring sweet success in breeding
4. Insights into activity-dependent neuronal growth through RSRF-supported research
5. Symposium Environmental Change in Siberia -- Insights From Earth Observation and Modeling
6. Yale technology spins out varicose vein device company: Vascular Insights, LLC
7. Insight into the processes of positive and negative learners
8. Insight into JAK/STAT
9. Insight into cell metabolism will help interpret PETs, MRIs
10. Insight into natural cholesterol control suggests novel cholesterol-lowering therapy
11. Insight into DNAs weakest links may yield clues to cancer biology

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Insight into our sight new view the evolution the eye lens

(Date:4/20/2015)... , April 20, 2015 The ... Glenbeigh Records Management (GRM), Ireland,s ... Dubai Islamic Bank. Having built up an impressive track record ... a leading player within the records management sector in ... to double is GCC staffbase and employ a further eight ...
(Date:4/14/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... growing mobile commerce market, announces that its Wocket® smart ... Design Awards under the category  ,Product Design – Technology,. ... are part of a global multi-disciplinary awards program. The ... marketplace, industry and judging panel. Winners will be announced ...
(Date:4/10/2015)... Research and Markets ( http://www.researchandmarkets.com/research/cjk4gb/security ) has ... - NEC" report to their offering. ... to supply a range of IT security management and ... on the development of a Big Data and cloud ... Asia-Pacific region is a core ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 2NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 3NEC Security Competitive Profile 2015 2
(Date:4/24/2015)... 2015 /CNW Telbec/ - Mirego, leader in mobile strategies and ... three mobile app extensions for the all new Apple Watch. ... Familiprix, OMSignal and MediaMiser, these extensions will reinvent the way ... specifically for wrist use.  Available today in ... highly customizable tactile smartwatch that makes for an excellent buddy ...
(Date:4/23/2015)... April 23, 2015 Athena San Diego, ... of executive women in San Diego’s technology and life ... Annual Pinnacle Awards at their Gala on April 30, ... Register now at http://athenasd.org/events/ , The Pinnacle ... Athena San Diego vision of fostering networking, risk taking ...
(Date:4/23/2015)... , April 23, 2015  Neurocrine Biosciences, Inc. (Nasdaq: ... report its first quarter 2015 results before the Nasdaq ... then host a live conference call and webcast to discuss ... morning, April 30, 2015 at 8:00 a.m. Eastern Time ... the live conference call by dialing 866-952-1906 (US) or ...
(Date:4/23/2015)... Prospects for Leading Companies in ... Details   We predict the global healthcare ... in 2015 and will grow at a CAGR of 6.3% ... around the world and increasing functional requirements for healthcare packaging ... global healthcare packaging market. A global ageing population, ...
Breaking Biology Technology:Familiprix, OMSignal and MediaMiser apps available today for Apple Watch 2Athena Pinnacle Awards to Honor Executives, Corporations and Educators Working to Promote Women Leaders 2Neurocrine Biosciences Announces Conference Call and Webcast to Report First Quarter 2015 Results 2Healthcare Packaging Market Forecast 2015-2025 2Healthcare Packaging Market Forecast 2015-2025 3Healthcare Packaging Market Forecast 2015-2025 4Healthcare Packaging Market Forecast 2015-2025 5Healthcare Packaging Market Forecast 2015-2025 6Healthcare Packaging Market Forecast 2015-2025 7Healthcare Packaging Market Forecast 2015-2025 8Healthcare Packaging Market Forecast 2015-2025 9Healthcare Packaging Market Forecast 2015-2025 10
Cached News: