NDLI: α-Ketoglutarate biosynthesis in wild and industrial strains ofLactococcus lactis

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α-Ketoglutarate biosynthesis in wild and industrial strains ofLactococcus lactis

Content Provider	Scilit
Author	Gutiérrez-Méndez, N. Valenzuela-Soto, E. González-Córdova, A. F. Vallejo-Cordoba, B.
Copyright Year	2008
Description	Journal: Letters in applied microbiology This study was carried out to explore the ability of wild and industrial strains of Lactococcus lactis to produce alpha-ketoglutarate (alpha-KG), which is essential during the conversion of amino acids to flavour compounds. Two pathways in alpha-KG biosynthesis were explored in strains of L. lactis isolated from dairy products, vegetables and commercial dairy starter cultures. Half of the strains efficiently converted glutamine to glutamate (Glu) and grew in Glu-free medium. Strains did not present isocitrate dehydrogenase and aconitase activities. However, half of the strains presented glutamate dehydrogenase (GDH) activity. The ability of L. lactis to synthesize either alpha-KG or Glu via GDH was confirmed. However, L. lactis strains were not able to biosynthesize alpha-KG by the citrate-isocitrate pathway. NADP-GDH activity was mainly found in strains isolated from vegetables, whereas NAD-GDH activity was mainly found in strains isolated from dairy products. The origin of isolation highly influenced NAD or NADP-GDH activities. These enzymatic activities may be correlated to the flavour production capacity of the different strains.
Related Links	http://onlinelibrary.wiley.com/doi/10.1111/j.1472-765X.2008.02405.x/pdf
Ending Page	207
Page Count	6
Starting Page	202
e-ISSN	1472765X
DOI	10.1111/j.1472-765x.2008.02405.x
Journal	Letters in applied microbiology
Issue Number	3
Volume Number	47
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2008-09-01
Access Restriction	Open
Subject Keyword	Journal: Letters in applied microbiology Food Science and Technology Lactococcus Lactis
Content Type	Text
Resource Type	Article

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