Uptake of Branched-Chain Amino Acids by Streptococcus thermophilus.

Applied and environmental microbiology ·Vol. 45 ·No. 1 ·1983-01-00 ·Pages 136-40

Akpemado KM, Bracquart PA

Abstract

The transport of branched-chain amino acids in Streptococcus thermophilus was energy dependent. The metabolic inhibitors of glycolysis and ATPase enzymes were active, but the proton-conducting uncouplers were not. Transport was optimal at temperatures of between 30 and 45 degrees C and at pH 7.0 for the three amino acids leucine, valine, and isoleucine; a second peak existed at pH 5.0 with valine and isoleucine. By competition and kinetics studies, the branched-chain amino acids were found to share at least a common transport system.

Authors & Affiliations

2 authors, click to expand affiliations / ORCID

Akpemado K M

Laboratory of Applied Biochemistry, University of Nancy I, 54506 Vandoeuvre-les-Nancy, Cedex France.

Bracquart P A

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Article Info

Journal

Applied and environmental microbiology

Abbr.

Appl Environ Microbiol

ISSN

0099-2240

DOI

10.1128/aem.45.1.136-140.1983

Published

1983-01-00

Pages

136-40

Language

English

Region

United States

NLM ID

7605801

PMCID

PMC242243

External Links

PubMed source DOI: 10.1128/aem.45.1.136-140.1983 PMC Full Text View journal details

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Uptake of Branched-Chain Amino Acids by Streptococcus thermophilus.

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