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. 1992 Mar;98(3):1170–1174. doi: 10.1104/pp.98.3.1170

Posttranslational Modifications in the Amino- Terminal Region of the Large Subunit of Ribulose- 1,5-Bisphosphate Carboxylase/Oxygenase from Several Plant Species 1

Robert L Houtz 1,2, Loelle Poneleit 1,2, Samantha B Jones 1,2,2, Malcolm Royer 1,2, John T Stults 1,2
PMCID: PMC1080323  PMID: 16668742

Abstract

A combination of limited tryptic proteolysis, reverse phasehigh performance liquid chromatography, Edman degradative sequencing, amino acid analysis, and fast-atom bombardment mass-spectrometry was used to remove and identify the first 14 to 18 N-terminal amino acid residues of the large subunit of higher plant-type ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) from Chlamydomonas reinhardtii, Marchantia polymorpha, pea (Pisum sativum), tomato (Lycopersicon esculentum), potato (Solanum tuberosum), pepper (Capsicum annuum), soybean (Glycine max), petunia (Petunia x hybrida), cowpea (Vigna sinensis), and cucumber (Cucumis sativus) plants. The N-terminal tryptic peptide from acetylated Pro-3 to Lys-8 of the large subunit of Rubisco was identical in all species, but the amino acid sequence of the penultimate N-terminal tryptic peptide varied. Eight of the 10 species examined contained a trimethyllysyl residue at position 14 in the large subunit of Rubisco, whereas Chlamydomonas and Marchantia contained an unmodified lysyl residue at this position.

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Selected References

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