Abstract
IT is sometimes desirable to study the possible relationship of two proteins when sequence data are unavailable. Few methods are useful for such an analysis: molecular size, functional criteria, genetic localization, end group analysis, tryptic fingerprints all have serious shortcomings. Immunological criteria may be useful when cross-reactivity is found, but such cross-reactivity is frequently one of the earliest common features to be lost. A possible useful criterion is amino-acid composition. Despite considerable changes in protein structure brought about by a limited number of sequence changes, the overall composition of evolutionary related proteins can be expected to remain quite similar. We wish to present a simple method for assessing and describing such compositional relatedness.
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METZGER, H., SHAPIRO, M., MOSIMANN, J. et al. Assessment of Compositional Relatedness between Proteins. Nature 219, 1166–1168 (1968). https://doi.org/10.1038/2191166a0
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DOI: https://doi.org/10.1038/2191166a0
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