Abstract
ABSTRACT The presence of lactate oxidase was examined in eight Streptococcus species and some related species of bacteria. A clone (pGR002) was isolated from a genomic library of Streptococcus iniae generated in Escherichia coli , containing a DNA fragment spanning two genes designated lctO and lctP . We show that these genes are likely to be involved in the l -lactic acid aerobic metabolism of this organism. This DNA fragment has been sequenced and characterized. A comparison of the deduced amino acid sequence of LctP protein demonstrated that the protein had significant homology with the l -lactate permeases of other bacteria. The amino acid sequence of the LctO protein of S. iniae also showed a strong homology to l -lactate oxidase from Aerococcus viridans and some NAD-independent lactate dehydrogenases, all belonging to the family of flavin mononucleotide-dependent α-hydroxyacid-oxidizing enzymes. Biochemical assays of the gene products confirm the identity of the genes from the isolated DNA fragment and reveal a possible role for the lactate oxidase from S. iniae . This lactate oxidase is discussed in relation to the growth of the organism in response to carbon source availability.
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Dates
Type | When |
---|---|
Created | 5 years, 8 months ago (Dec. 19, 2019, 2:42 p.m.) |
Deposited | 3 years, 6 months ago (Feb. 23, 2022, 2:01 a.m.) |
Indexed | 2 days, 5 hours ago (Aug. 26, 2025, 3:06 a.m.) |
Issued | 25 years, 10 months ago (Oct. 1, 1999) |
Published | 25 years, 10 months ago (Oct. 1, 1999) |
Published Print | 25 years, 10 months ago (Oct. 1, 1999) |
@article{Gibello_1999, title={Cloning and Analysis of the <scp>l</scp> -Lactate Utilization Genes from Streptococcus iniae}, volume={65}, ISSN={1098-5336}, url={http://dx.doi.org/10.1128/aem.65.10.4346-4350.1999}, DOI={10.1128/aem.65.10.4346-4350.1999}, number={10}, journal={Applied and Environmental Microbiology}, publisher={American Society for Microbiology}, author={Gibello, A. and Collins, M. D. and Domínguez, L. and Fernández-Garayzábal, J. F. and Richardson, P. T.}, year={1999}, month=oct, pages={4346–4350} }