Nucleic Acids Research, 2000, Vol. 28, No. 1 214-218
© 2000 Oxford University Press
Kabat Database and its applications: 30 years after the first variability plot
Departments of Biochemistry, Molecular Biology and Cell Biology, and of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
The Kabat Database was initially started in 1970 to determine the combining site of antibodies based on the available amino acid sequences at that time. Bence Jones proteins, mostly from human, were aligned, using the now-known Kabat numbering system, and a quantitative measure, variability, was calculated for every position. Three peaks, at positions 2434, 5056 and 8997, were identified and proposed to form the complementarity determining regions (CDR) of light chains. Subsequently, antibody heavy chain amino acid sequences were also aligned using a different numbering system, since the locations of their CDRs (3135B, 5065 and 95102) are different from those of the light chains. CDRL1 starts right after the first invariant Cys 23 of light chains, while CDRH1 is eight amino acid residues away from the first invariant Cys 22 of heavy chains. During the past 30 years, the Kabat database has grown to include nucleotide sequences, sequences of T cell receptors for antigens (TCR), major histocompatibility complex (MHC) class I and II molecules and other proteins of immunological interest. It has been used extensively by immunologists to derive useful structural and functional information from the primary sequences of these proteins. An overall view of the Kabat Database and its various applications are summarized here. The Kabat Database is freely available at http://immuno.bme.nwu.edu
* To whom correspondence should be addressed. Tel: +1 847 491 7849; Fax: +1 847 491 4928; Email: t-wu@nwu.edu
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