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Abstract
A gene, designated khe, that encodes a haemolysin of Klebsiella pneumoniae CMC-1 has been cloned and sequenced. When expressed in Escherichia coli, a unique peptide of approximately 20kDa was identified. Nucleotide sequence analysis predicted a single open reading frame (ORF) of 486bp encoding a 162 amino acid polypeptide with an estimated pI of 6·77. No extensive sequence homology could be identified between khe and any reported sequence at either the nucleotide or amino acid level. Furthermore, DNA hybridizations under high stringency conditions failed to show any cross hybridizations to several bacteria including K. oxytoca, K. planticola, K. terrigena and K. ornithinolytica. These data indicate that we have cloned a unique gene, which is highly conserved among tested K. pneumoniae isolates.
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