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Molecular characterization of the Sinorhizobium meliloti nlpD gene
W R Streit1, K Hofmann, W Liebl
1Institut für Mikrobiologie und Genetik der Universität Göttingen, Germany. wstreit@gwdg.de
Archives of Microbiology
|November 18, 2000
Abstract:
The Sinorhizobium meliloti nlpD gene consists of 1,539 nucleotides and codes for 512 amino acids. Expression of the nlpD gene as a histidine-tagged protein in Escherichia coli resulted in the production of a 57-kDa protein. The deduced polypeptide sequence of NlpD contains one unusual hexamer repeat (KVQRGQ), one tetramer (TVTV) and two direct and inverted trimer repeats (KAA, AAK). The N-terminal amino acid residues displayed similarity with signal peptides of secreted bacterial lipoproteins. Mutations of the S. meliloti nlpD gene caused decreased survival of cells in the stationary phase.