Retinal cryptochrome in a migratory passerine bird: a possible transducer for the avian magnetic compass - PubMed (original) (raw)

Comparative Study

doi: 10.1007/s00114-004-0578-9. Epub 2004 Nov 17.

Affiliations

• PMID: 15551029
• DOI: 10.1007/s00114-004-0578-9

Comparative Study

Retinal cryptochrome in a migratory passerine bird: a possible transducer for the avian magnetic compass

Andrea Möller et al. Naturwissenschaften. 2004 Dec.

Abstract

The currently discussed model of magnetoreception in birds proposes that the direction of the magnetic field is perceived by radical-pair processes in specialized photoreceptors, with cryptochromes suggested as potential candidate molecules mediating magnetic compass information. Behavioral studies have shown that magnetic compass orientation takes place in the eye and requires light from the blue-green part of the spectrum. Cryptochromes are known to absorb in the same spectral range. Because of this we searched for cryptochrome (CRY) in the retina of European robins, Erithacus rubecula, passerine birds that migrate at night. Here, we report three individually expressed cryptochromes, eCRY1a, eCRY1b, and eCRY2. While eCRY1a and eCRY2 are similar to the cryptochromes found in the retina of the domestic chicken, eCRY1b has a unique carboxy (C)-terminal. In light of the 'radical-pair' model, our findings support a potential role of cryptochromes as transducers for the perception of magnetic compass information in birds.

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