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Protocadherins were discovered by Shintaro Suzuki's group, when they used PCR to find new members of the cadherin family^[1]. The PCR fragments that corresponded to Protocadherins were found in vertebrate and invertebrate species. This prevalence in a wide range of species suggested that the fragments were part of an ancient cadherin and were thus termed "Protocadherins" as the "first cadherins".

It turns out that protocadherins are the largest subfamily of cadherins present in mammals as differentiators of specific cells. Their function has also been linked to homophilic adhesion, and the protocadherins have been identified as mediators of this adhesion. However, further evidence suggests that protocadherins can also act as signaling or receptor molecules^[2].

See also

• Cadherin

References

1. ^ Protocadherins: a large family of cadherin-related molecules in central nervous system by K. Sano, H. Tanihara, R. L. Heimark, S. Obata, M. Davidson, T. St. John, S. Taketani and S. Suzuki in EMBO Journal (1993) Volume 12 pages 2249–2256.
2. ^ Paraxial protocadherin coordinates cell polarity during convergent extension via Rho A and JNK by Frank Unterseher, Joerg A. Hefele, Klaudia Giehl, Eddy M. De Robertis, Doris Wedlich and Alexandra Schambony in EMBO Journal (2004) Volume 23, pages 3259–3269.

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