Crossref journal-article
Wiley
The Plant Journal (311)
Abstract

Summary3‐ketoacyl‐CoA thiolase (KAT) (EC: 2.3.1.16) catalyses a key step in fatty acid β‐oxidation. Expression of the Arabidopsis thaliana KAT gene on chromosome 2 (KAT2), which encodes a peroxisomal thiolase, is activated in early seedling growth. We identified a T‐DNA insertion in this gene which abolishes its expression and eliminates most of the thiolase activity in seedlings. In the homozygous kat2 mutant, seedling growth is dependent upon exogenous sugar, and storage triacylglycerol (TAG) and lipid bodies persist in green cotyledons. The peroxisomes in cotyledons of kat2 seedlings are very large, the total peroxisomal compartment is dramatically increased, and some peroxisomes contain unusual membrane inclusions. The size and number of plastids and mitochondria are also modified. Long‐chain (C16 to C20) fatty acyl‐CoAs accumulate in kat2 seedlings, indicating that the mutant lacks long‐chain thiolase activity. In addition, extracts from kat2 seedlings have significantly decreased activity with aceto‐acetyl CoA, and KAT2 appears to be the only thiolase gene expressed at significant levels during germination and seedling growth, indicating that KAT2 has broad substrate specificity. The kat2 phenotype can be complemented by KAT2 or KAT5 cDNAs driven by the CaMV 35S promoter, showing that these enzymes are functionally equivalent, but that expression of the KAT5 gene in seedlings is too low for effective catabolism of TAG. By comparison with glyoxylate cycle mutants, it is concluded that while gluconeogenesis from fatty acids is not absolutely required to support Arabidopsis seedling growth, peroxisomal β‐oxidation is essential, which is in turn required for breakdown of TAG in lipid bodies.

Bibliography

Germain, V., Rylott, E. L., Larson, T. R., Sherson, S. M., Bechtold, N., Carde, J., Bryce, J. H., Graham, I. A., & Smith, S. M. (2001). Requirement for 3‐ketoacyl‐CoA thiolase‐2 in peroxisome development, fatty acid β‐oxidation and breakdown of triacylglycerol in lipid bodies of Arabidopsis seedlings. The Plant Journal, 28(1), 1–12. Portico.

Authors 9
  1. Véronique Germain (first)
  2. Elizabeth L. Rylott (additional)
  3. Tony R. Larson (additional)
  4. Sarah M. Sherson (additional)
  5. Nicole Bechtold (additional)
  6. Jean‐Pierre Carde (additional)
  7. James H. Bryce (additional)
  8. Ian A. Graham (additional)
  9. Steven M. Smith (additional)
References 51 Referenced 189
  1. 10.1038/191433a0
  2. {'key': 'e_1_2_6_3_1', 'first-page': '1194', 'article-title': 'In planta Agrobacterium‐mediated gene transfer by infiltration of adult Arabidopsis thaliana plants', 'volume': '316', 'author': 'Bechtold N.', 'year': '1993', 'journal-title': 'C.R. Acad. Sci. Paris, Life Sci.'} / C.R. Acad. Sci. Paris, Life Sci. / In planta Agrobacterium‐mediated gene transfer by infiltration of adult Arabidopsis thaliana plants by Bechtold N. (1993)
  3. 10.1016/0003-9861(88)90624-8
  4. 10.1111/j.1461-0248.2006.00905.x
  5. {'key': 'e_1_2_6_6_1', 'first-page': '1188', 'article-title': 'A binary vector based on basta resistance for in planta transformation of Arabidopsis thaliana', 'volume': '316', 'author': 'Bouchez D.', 'year': '1993', 'journal-title': 'C.R. Acad. Sci. Paris, Life Sci.'} / C.R. Acad. Sci. Paris, Life Sci. / A binary vector based on basta resistance for in planta transformation of Arabidopsis thaliana by Bouchez D. (1993)
  6. 10.1007/BF00281801
  7. 10.1016/0003-2697(86)90132-6
  8. Carde J.P.(1987)Electron microscopy of plant cell membranes. InPlant Cell Membranes.Methods in Enzymology 148 (L.PackerandR.Douce eds). New York:Academic Press pp. 599–622. (10.1016/0076-6879(87)48058-0)
  9. 10.1242/jcs.112.10.1579
  10. 10.1046/j.1365-313x.1998.00343.x
  11. 10.1016/S0021-9258(18)83401-9
  12. 10.1042/bj2960199
  13. 10.1073/pnas.97.10.5669
  14. 10.1042/bst0280095
  15. 10.1074/jbc.M004945200
  16. 10.1105/tpc.10.4.613
  17. {'key': 'e_1_2_6_18_1', 'first-page': 'ss24', 'article-title': 'Promoter trapping in Arabidopsis– one T‐DNA tag, three transcripts and two thiolase genes', 'volume': '47', 'author': 'Ferreira da Rocha P.S.C.', 'year': '1996', 'journal-title': 'J. Exp. Bot.'} / J. Exp. Bot. / Promoter trapping in Arabidopsis– one T‐DNA tag, three transcripts and two thiolase genes by Ferreira da Rocha P.S.C. (1996)
  18. 10.1104/pp.123.2.733
  19. {'key': 'e_1_2_6_20_1', 'first-page': 'S20', 'article-title': 'Role of malate synthase and the glyoxylate cycle in oilseed plants', 'volume': '18', 'author': 'Germain V.', 'year': '2000', 'journal-title': 'Plant Mol. Biol. Rep.'} / Plant Mol. Biol. Rep. / Role of malate synthase and the glyoxylate cycle in oilseed plants by Germain V. (2000)
  20. 10.1105/tpc.4.3.349
  21. 10.2307/3869878
  22. 10.1016/0005-2760(95)00020-D
  23. 10.1146/annurev.pp.39.060188.000533
  24. 10.1007/PL00013888
  25. {'key': 'e_1_2_6_26_1', 'first-page': '183', 'article-title': '2,4‐dichlorophenoxybutyric acid‐resistant mutants of Arabidopsis have defects in glyoxysomal fatty acid acid β‐oxidation', 'volume': '10', 'author': 'Hayashi M.', 'year': '1998', 'journal-title': 'Plant Cell'} / Plant Cell / 2,4‐dichlorophenoxybutyric acid‐resistant mutants of Arabidopsis have defects in glyoxysomal fatty acid acid β‐oxidation by Hayashi M. (1998)
  26. 10.1074/jbc.274.18.12715
  27. 10.1023/a:1006496308160
  28. 10.1042/bj3200607
  29. 10.1046/j.1365-313X.1999.00559.x
  30. 10.1016/S0006-291X(79)80034-0
  31. 10.1007/BF00019471
  32. 10.1016/S0021-9258(19)83948-0 / J. Biol. Chem. / Plant acyl‐CoA oxidase: purification, characterisation and monomeric apoprotein by Kirsch T. (1986)
  33. 10.1007/BF00331014
  34. 10.1105/tpc.11.12.2283
  35. 10.1038/227680a0
  36. 10.1046/j.1365-313x.2001.00929.x
  37. 10.1007/BF00224392
  38. 10.1128/jb.149.1.173-180.1982 / J. Bact. / Genetic regulation of the glyoxylate shunt in Escherichia coli K‐12 by Maloy S.R. (1982)
  39. 10.1034/j.1399-3054.2000.100301.x
  40. 10.1046/j.1365-313X.1995.8040613.x
  41. 10.1016/s0014-5793(97)00766-7
  42. 10.1104/pp.121.4.1359
  43. 10.1007/BF00038995
  44. 10.1016/S0021-9258(17)32017-3 / J. Biol. Chem. / Domains of the tetrafunctional protein acting in glyoxysomal fatty acid β‐oxidation by Preisig‐Müller R. (1994)
  45. {'key': 'e_1_2_6_46_1', 'first-page': '153', 'article-title': 'Peroxisomal β‐oxidation of fatty acids and citrate formation by a particulate fraction from early germinating sunflower seeds', 'volume': '30', 'author': 'Raymond P.', 'year': '1992', 'journal-title': 'Plant Physiol. Biochem.'} / Plant Physiol. Biochem. / Peroxisomal β‐oxidation of fatty acids and citrate formation by a particulate fraction from early germinating sunflower seeds by Raymond P. (1992)
  46. {'key': 'e_1_2_6_47_1', 'first-page': '1911', 'article-title': 'A defect in β‐oxidation causes abnormal inflorescence development in Arabidopsis', 'volume': '11', 'author': 'Richmond T.A.', 'year': '1999', 'journal-title': 'Plant Cell'} / Plant Cell / A defect in β‐oxidation causes abnormal inflorescence development in Arabidopsis by Richmond T.A. (1999)
  47. 10.1016/S0021-9258(18)37752-4 / J. Biol. Chem. / Quantification of carbon fluxes through the tricarboxylic acid cycle in early germinating lettuce embryos by Salon C. (1988)
  48. {'key': 'e_1_2_6_49_1', 'volume-title': 'Molecular Cloning. A Laboratory Manual', 'author': 'Sambrook J.', 'year': '1989'} / Molecular Cloning. A Laboratory Manual by Sambrook J. (1989)
  49. 10.1046/j.1365-313x.2000.00935.x
  50. 10.1074/jbc.M909285199
  51. 10.1083/jcb.150.3.489
Dates
Type When
Created 22 years, 5 months ago (March 12, 2003, 5:05 p.m.)
Deposited 1 year, 10 months ago (Oct. 17, 2023, 7:51 a.m.)
Indexed 1 month, 2 weeks ago (July 16, 2025, 9:32 a.m.)
Issued 23 years, 11 months ago (Oct. 1, 2001)
Published 23 years, 11 months ago (Oct. 1, 2001)
Published Online 23 years, 8 months ago (Dec. 23, 2001)
Published Print 23 years, 11 months ago (Oct. 1, 2001)
Funders 0

None

@article{Germain_2001, title={Requirement for 3‐ketoacyl‐CoA thiolase‐2 in peroxisome development, fatty acid β‐oxidation and breakdown of triacylglycerol in lipid bodies of Arabidopsis seedlings}, volume={28}, ISSN={1365-313X}, url={http://dx.doi.org/10.1046/j.1365-313x.2001.01095.x}, DOI={10.1046/j.1365-313x.2001.01095.x}, number={1}, journal={The Plant Journal}, publisher={Wiley}, author={Germain, Véronique and Rylott, Elizabeth L. and Larson, Tony R. and Sherson, Sarah M. and Bechtold, Nicole and Carde, Jean‐Pierre and Bryce, James H. and Graham, Ian A. and Smith, Steven M.}, year={2001}, month=oct, pages={1–12} }