PMID: 11911088Mar 26, 2002Paper

Proteomics: posttranslational modifications, immune responses and current analytical tools

Biomolecular Engineering
S Meri, M Baumann

Abstract

The publication of the human genome sequence enables most of the still unknown protein sequences to be added to the current databases. A sequence alone does not, however, give information about the possible expression level of the corresponding protein, neither does it inform about the possible posttranslational modifications, like phosphorylation, glycosylation or changes in individual amino acids. Thus, the human proteome project, a large scale analysis of the functions of gene products, will have an enormous impact on our understanding of the biochemistry of proteins, processes and pathways they are involved in. The diversity in proteins is considerably expanded by various posttranslational modifications. These also pose problems to the investigators, but their careful analysis often pays back because they can reveal important properties in proteins or peptides--like an increased antigenicity leading to (auto)immune responses or an active form of a signaling protein. Immune tolerance usually exists towards self-proteins, but in specific cases it may be broken by posttranslational modifications in the proteins. Novel mass spectrometric, affinity and display techniques offer valuable tools for the large-scale analysis of prote...Continue Reading

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