Gene 1991 Jun 30;1022:255-9.

Primary structure of human, chicken, and Xenopus laevis p11, a cellular ligand of the Src-kinase substrate, annexin II.

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The p11 protein is a member of the S-100 family of Ca(2+)-binding proteins and serves within the cell as a ligand of the tyrosine kinase substrate, annexin II. To obtain more structural information on this molecule, we have isolated and characterized p11 cDNA clones from several different species. A comparison of the deduced amino acid (aa) sequences reveals that mammalian and avian p11 are highly similar (at least 90% identical at the aa level), whereas p11 from Xenopus laevis shows a considerable degree of sequence variation (the aa sequence identity drops to approx. 60% when compared to mammalian or chicken p11). Interestingly, the C-terminal 18 aa, which are unique to p11 within the S-100 family, show a relatively high conservation among species. This high evolutionary conservation is in line with a structurally and/or functionally important role of this C terminus, e.g., in annexin II binding.

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Species referenced: Xenopus laevis
Genes referenced: anxa2 endoul s100a10