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. 1992 Feb;174(4):1352-9.
doi: 10.1128/jb.174.4.1352-1359.1992.

The 14,000-molecular-weight antigen of Mycobacterium tuberculosis is related to the alpha-crystallin family of low-molecular-weight heat shock proteins

A Verbon  1 , R A Hartskeerl, A Schuitema, A H Kolk, D B Young, R Lathigra
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The 14,000-molecular-weight antigen of Mycobacterium tuberculosis is related to the alpha-crystallin family of low-molecular-weight heat shock proteins

A Verbon et al. J Bacteriol. 1992 Feb.

Abstract

Eight monoclonal antibodies (MAbs) directed against the 14,000-molecular-weight (14K) antigen of Mycobacterium tuberculosis reacted specifically with mycobacteria of the M. tuberculosis complex. The nucleotide sequence of the gene encoding the 14K antigen was determined by using recombinant DNA clones isolated from lambda gt11 and cosmid libraries of the M. tuberculosis genome. The DNA sequence of the 14K protein gene coded for a polypeptide of 144 amino acids with a calculated molecular mass of 16,277 Da. The 14K antigen has a marked homology with proteins belonging to the alpha-crystallin family of low-molecular-weight heat shock proteins, which includes the 18K antigen of M. leprae. The eight MAbs recognized at least four distinct epitopes localized within the following three regions of the 14K protein: amino acids 10 to 92 (MAbs F67-8 and F67-16), amino acids 41 to 92 (F159-1 and F159-11), and amino acids 41 to 144 (F23-41, F24-2, F23-49, and TB68).

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