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. 1986 Jan;5(1):9–13. doi: 10.1002/j.1460-2075.1986.tb04170.x

Transit peptides of nuclear-encoded chloroplast proteins share a common amino acid framework.

G A Karlin-Neumann, E M Tobin
PMCID: PMC1166688  PMID: 3514209

Abstract

We have identified three major blocks of amino acid homology shared by the transit peptides of two nuclear-encoded chloroplast proteins, the light-harvesting chlorophyll a/b-protein (LHCP) II of the thylakoid membrane and the small subunit (SSU) of ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO) of the stroma. These previously unrecognized homology blocks lie at the beginning, middle and end of both transit sequences, and are separated by differing lengths of unshared (interblock) sequence in the two proteins. These interblocks may be dispensible or they might confer a specific property on the individual proteins, such as facilitating proper compartmentalization within the chloroplast. We propose that these three shared sequence elements form a common framework in transit-bearing chloroplast precursors which mediates the common functions performed by each transit peptide. Ferredoxin, the only other such nuclear-encoded protein for which a published transit sequence exists, conforms to the predictions of this hypothesis. These findings stand in contrast to mitochondrial leader sequences and the well-studied signal peptides of secretory and certain integral membrane proteins in which no such framework has been observed.

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Selected References

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  1. Berry-Lowe S. L., Mc Knight T. D., Shah D. M., Meagher R. B. The nucleotide sequence, expression, and evolution of one member of a multigene family encoding the small subunit of ribulose-1,5-bisphosphate carboxylase in soybean. J Mol Appl Genet. 1982;1(6):483–498. [PubMed] [Google Scholar]
  2. Broglie R., Coruzzi G., Fraley R. T., Rogers S. G., Horsch R. B., Niedermeyer J. G., Fink C. L., Chua N. H. Light-regulated expression of a pea ribulose-1,5-bisphosphate carboxylase small subunit gene in transformed plant cells. Science. 1984 May 25;224(4651):838–843. doi: 10.1126/science.6719112. [DOI] [PubMed] [Google Scholar]
  3. Cashmore A. R. Structure and expression of a pea nuclear gene encoding a chlorophyll a/b-binding polypeptide. Proc Natl Acad Sci U S A. 1984 May;81(10):2960–2964. doi: 10.1073/pnas.81.10.2960. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Chou P. Y., Fasman G. D. Empirical predictions of protein conformation. Annu Rev Biochem. 1978;47:251–276. doi: 10.1146/annurev.bi.47.070178.001343. [DOI] [PubMed] [Google Scholar]
  5. Chua N. H., Schmidt G. W. Post-translational transport into intact chloroplasts of a precursor to the small subunit of ribulose-1,5-bisphosphate carboxylase. Proc Natl Acad Sci U S A. 1978 Dec;75(12):6110–6114. doi: 10.1073/pnas.75.12.6110. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Chua N. H., Schmidt G. W. Transport of proteins into mitochondria and chloroplasts. J Cell Biol. 1979 Jun;81(3):461–483. doi: 10.1083/jcb.81.3.461. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Cline K., Werner-Washburne M., Lubben T. H., Keegstra K. Precursors to two nuclear-encoded chloroplast proteins bind to the outer envelope membrane before being imported into chloroplasts. J Biol Chem. 1985 Mar 25;260(6):3691–3696. [PubMed] [Google Scholar]
  8. Coruzzi G., Broglie R., Cashmore A., Chua N. H. Nucleotide sequences of two pea cDNA clones encoding the small subunit of ribulose 1,5-bisphosphate carboxylase and the major chlorophyll a/b-binding thylakoid polypeptide. J Biol Chem. 1983 Feb 10;258(3):1399–1402. [PubMed] [Google Scholar]
  9. Dunsmuir P. The petunia chlorophyll a/b binding protein genes: a comparison of Cab genes from different gene families. Nucleic Acids Res. 1985 Apr 11;13(7):2503–2518. doi: 10.1093/nar/13.7.2503. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Grossman A. R., Bartlett S. G., Schmidt G. W., Mullet J. E., Chua N. H. Optimal conditions for post-translational uptake of proteins by isolated chloroplasts. In vitro synthesis and transport of plastocyanin, ferredoxin-NADP+ oxidoreductase, and fructose-1,6-bisphosphatase. J Biol Chem. 1982 Feb 10;257(3):1558–1563. [PubMed] [Google Scholar]
  11. Hay R., Böhni P., Gasser S. How mitochondria import proteins. Biochim Biophys Acta. 1984 Jan 27;779(1):65–87. doi: 10.1016/0304-4157(84)90004-2. [DOI] [PubMed] [Google Scholar]
  12. Horwich A. L., Fenton W. A., Williams K. R., Kalousek F., Kraus J. P., Doolittle R. F., Konigsberg W., Rosenberg L. E. Structure and expression of a complementary DNA for the nuclear coded precursor of human mitochondrial ornithine transcarbamylase. Science. 1984 Jun 8;224(4653):1068–1074. doi: 10.1126/science.6372096. [DOI] [PubMed] [Google Scholar]
  13. Horwich A. L., Kalousek F., Mellman I., Rosenberg L. E. A leader peptide is sufficient to direct mitochondrial import of a chimeric protein. EMBO J. 1985 May;4(5):1129–1135. doi: 10.1002/j.1460-2075.1985.tb03750.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Hurt E. C., Pesold-Hurt B., Schatz G. The cleavable prepiece of an imported mitochondrial protein is sufficient to direct cytosolic dihydrofolate reductase into the mitochondrial matrix. FEBS Lett. 1984 Dec 10;178(2):306–310. doi: 10.1016/0014-5793(84)80622-5. [DOI] [PubMed] [Google Scholar]
  15. Karlin-Neumann G. A., Kohorn B. D., Thornber J. P., Tobin E. M. A chlorophyll a/b-protein encoded by a gene containing an intron with characteristics of a transposable element. J Mol Appl Genet. 1985;3(1):45–61. [PubMed] [Google Scholar]
  16. Lamppa G. K., Morelli G., Chua N. H. Structure and developmental regulation of a wheat gene encoding the major chlorophyll a/b-binding polypeptide. Mol Cell Biol. 1985 Jun;5(6):1370–1378. doi: 10.1128/mcb.5.6.1370. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Lingappa V. R., Chaidez J., Yost C. S., Hedgpeth J. Determinants for protein localization: beta-lactamase signal sequence directs globin across microsomal membranes. Proc Natl Acad Sci U S A. 1984 Jan;81(2):456–460. doi: 10.1073/pnas.81.2.456. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Mazur B. J., Chui C. F. Sequence of a genomic DNA clone for the small subunit of ribulose bis-phosphate carboxylase-oxygenase from tobacco. Nucleic Acids Res. 1985 Apr 11;13(7):2373–2386. doi: 10.1093/nar/13.7.2373. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Mishkind M. L., Wessler S. R., Schmidt G. W. Functional determinants in transit sequences: import and partial maturation by vascular plant chloroplasts of the ribulose-1,5-bisphosphate carboxylase small subunit of Chlamydomonas. J Cell Biol. 1985 Jan;100(1):226–234. doi: 10.1083/jcb.100.1.226. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Morohashi K., Fujii-Kuriyama Y., Okada Y., Sogawa K., Hirose T., Inayama S., Omura T. Molecular cloning and nucleotide sequence of cDNA for mRNA of mitochondrial cytochrome P-450(SCC) of bovine adrenal cortex. Proc Natl Acad Sci U S A. 1984 Aug;81(15):4647–4651. doi: 10.1073/pnas.81.15.4647. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Ortiz W., Lam E., Chollar S., Munt D., Malkin R. Topography of the protein complexes of the chloroplast thylakoid membrane : studies of photosystem I using a chemical probe and proteolytic digestion. Plant Physiol. 1985 Feb;77(2):389–397. doi: 10.1104/pp.77.2.389. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Pinck M., Guilley E., Durr A., Hoff M., Pinck L., Fleck J. Complete sequence of one of the mRNAs coding for the small subunit of ribulose bisphosphate carboxylase of Nicotiana sylvestris. Biochimie. 1984 Jul-Aug;66(7-8):539–545. doi: 10.1016/0300-9084(84)90148-2. [DOI] [PubMed] [Google Scholar]
  23. Robinson C., Ellis R. J. Transport of proteins into chloroplasts. Partial purification of a chloroplast protease involved in the processing of important precursor polypeptides. Eur J Biochem. 1984 Jul 16;142(2):337–342. doi: 10.1111/j.1432-1033.1984.tb08291.x. [DOI] [PubMed] [Google Scholar]
  24. Robinson C., Ellis R. J. Transport of proteins into chloroplasts. The precursor of small subunit of ribulose bisphosphate carboxylase is processed to the mature size in two steps. Eur J Biochem. 1984 Jul 16;142(2):343–346. doi: 10.1111/j.1432-1033.1984.tb08292.x. [DOI] [PubMed] [Google Scholar]
  25. Schmidt G. W., Bartlett S. G., Grossman A. R., Cashmore A. R., Chua N. H. Biosynthetic pathways of two polypeptide subunits of the light-harvesting chlorophyll a/b protein complex. J Cell Biol. 1981 Nov;91(2 Pt 1):468–478. doi: 10.1083/jcb.91.2.468. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Schmidt G. W., Devillers-Thiery A., Desruisseaux H., Blobel G., Chua N. H. NH2-terminal amino acid sequences of precursor and mature forms of the ribulose-1,5-bisphosphate carboxylase small subunit from Chlamydomonas reinhardtii. J Cell Biol. 1979 Dec;83(3):615–622. doi: 10.1083/jcb.83.3.615. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Schreier P. H., Seftor E. A., Schell J., Bohnert H. J. The use of nuclear-encoded sequences to direct the light-regulated synthesis and transport of a foreign protein into plant chloroplasts. EMBO J. 1985 Jan;4(1):25–32. doi: 10.1002/j.1460-2075.1985.tb02312.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Smeekens S., van Binsbergen J., Weisbeek P. The plant ferredoxin precursor: nucleotide sequence of a full length cDNA clone. Nucleic Acids Res. 1985 May 10;13(9):3179–3194. doi: 10.1093/nar/13.9.3179. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Smith S. M., Bedbrook J., Speirs J. Characterisation of three cDNA clones encoding different mRNAs for the precursor to the small subunit of wheat ribulosebisphosphate carboxylase. Nucleic Acids Res. 1983 Dec 20;11(24):8719–8734. doi: 10.1093/nar/11.24.8719. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Stiekema W. J., Wimpee C. F., Tobin E. M. Nucleotide sequence encoding the precursor of the small subunit of ribulose 1,5-bisphosphate carboxylase from Lemna gibba L.G-3. Nucleic Acids Res. 1983 Nov 25;11(22):8051–8061. doi: 10.1093/nar/11.22.8051. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Van den Broeck G., Timko M. P., Kausch A. P., Cashmore A. R., Van Montagu M., Herrera-Estrella L. Targeting of a foreign protein to chloroplasts by fusion to the transit peptide from the small subunit of ribulose 1,5-bisphosphate carboxylase. 1985 Jan 31-Feb 6Nature. 313(6001):358–363. doi: 10.1038/313358a0. [DOI] [PubMed] [Google Scholar]
  32. Walter P., Gilmore R., Blobel G. Protein translocation across the endoplasmic reticulum. Cell. 1984 Aug;38(1):5–8. doi: 10.1016/0092-8674(84)90520-8. [DOI] [PubMed] [Google Scholar]
  33. von Heijne G. Analysis of the distribution of charged residues in the N-terminal region of signal sequences: implications for protein export in prokaryotic and eukaryotic cells. EMBO J. 1984 Oct;3(10):2315–2318. doi: 10.1002/j.1460-2075.1984.tb02132.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. von Heijne G. Patterns of amino acids near signal-sequence cleavage sites. Eur J Biochem. 1983 Jun 1;133(1):17–21. doi: 10.1111/j.1432-1033.1983.tb07424.x. [DOI] [PubMed] [Google Scholar]

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