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Biotin synthesis in higher plants: isolation of a cDNA encoding Arabidopsis thaliana bioB-gene product equivalent by functional complementation of a biotin auxotroph mutant bioB105 of Escherichia coli K12.

Abstract : Biotin synthase is involved in the conversion of dethiobiotin to biotin in bacteria, yeast and higher plants. We isolated a complete cDNA (1.3 kb) encoding A. thaliana bioB-gene product by functional complementation of the bioB105 biotin auxotroph mutant of Escherichia coli K12 using an A. thaliana cDNA library. The open reading frame encodes a predicted protein of 378 amino acids and molecular mass of 41.634 Da. The bioB-gene product from A. thaliana shows specific regions of homology with the bioB-gene products of E. coli, Serratia marcescens, Bacillus sphaericus, and Saccharomyces cerevisiae. The predicted amino acid sequence of the plant protein contains the consensus region GXCXEDCXYCXQ involved in the [2Fe-2S] cluster binding. Furthermore, it does not present a transit peptide in its N-terminal region suggesting that the A. thaliana bioB-gene product reported in this paper is located in the cytosolic compartment.
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https://hal.inrae.fr/hal-03319958
Contributor : Pierre Baldet <>
Submitted on : Friday, August 13, 2021 - 3:13:52 PM
Last modification on : Friday, August 13, 2021 - 3:13:53 PM

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  • HAL Id : hal-03319958, version 1
  • PUBMED : 8680961

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Pierre Baldet, M Ruffet. Biotin synthesis in higher plants: isolation of a cDNA encoding Arabidopsis thaliana bioB-gene product equivalent by functional complementation of a biotin auxotroph mutant bioB105 of Escherichia coli K12.. Comptes rendus de l’Académie des sciences. Série III, Sciences de la vie, Elsevier, 1996, 319 (2), pp.99-106. ⟨hal-03319958⟩

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