Crossref journal-article
Wiley
European Journal of Biochemistry (311)
Abstract

The immunosuppressant FK506 is a 23‐membered macrocyclic polyketide produced by several Streptomyces species. Sequencing of a 19.5‐kb contiguous segment of DNA from the FK506 gene cluster of Streptomyces sp. MA6548 revealed the presence of a single 19.3‐kb open reading frame designated fkbA. fkbA encodes a component of the FK506 polyketide synthase, a complex enzyme system which catalyzes synthesis of the polyketide portion of FK506. The predicted product of gene fkbA is a 630660‐Da protein (6420 amino acids) that contains 19 independent domains with a high degree of amino acid sequence similarity to the catalytic activities of known fatty acid synthases. The identified domains are arranged into four repeated modules with a linear organization precisely as that of animal fatty acid synthase and type I polyketide synthase. Each module participates in one round of chain extension and subsequent processing and thus FkbA polypeptide catalyzes four of the ten condensation steps required for synthesis of the FK506 macrolactone ring. Disruption of fkbA results in the generation of an FK506 non‐producing mutant demonstrating direct involvement of fkbA in the biosynthesis of FK506.

Bibliography

Motamedi, H., Cai, S., Shafiee, A., & Elliston, K. O. (1997). Structural Organization of A Multifunctional Polyketide Synthase Involved in the Biosynthesis of the Macrolide Immunosuppressant FK506. European Journal of Biochemistry, 244(1), 74–80. Portico.

Authors 4
  1. Haideh Motamedi (first)
  2. Sheng‐Jian Cai (additional)
  3. Ali Shafiee (additional)
  4. Keith O. Elliston (additional)
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Dates
Type When
Created 21 years, 1 month ago (July 16, 2004, 10:23 a.m.)
Deposited 1 year, 9 months ago (Nov. 23, 2023, 1:27 a.m.)
Indexed 1 month, 2 weeks ago (July 23, 2025, 8:45 a.m.)
Issued 28 years, 7 months ago (Feb. 1, 1997)
Published 28 years, 7 months ago (Feb. 1, 1997)
Published Online 21 years, 1 month ago (July 16, 2004)
Published Print 28 years, 7 months ago (Feb. 1, 1997)
Funders 0

None

@article{Motamedi_1997, title={Structural Organization of A Multifunctional Polyketide Synthase Involved in the Biosynthesis of the Macrolide Immunosuppressant FK506}, volume={244}, ISSN={1432-1033}, url={http://dx.doi.org/10.1111/j.1432-1033.1997.00074.x}, DOI={10.1111/j.1432-1033.1997.00074.x}, number={1}, journal={European Journal of Biochemistry}, publisher={Wiley}, author={Motamedi, Haideh and Cai, Sheng‐Jian and Shafiee, Ali and Elliston, Keith O.}, year={1997}, month=feb, pages={74–80} }