Evidence for selection as a mechanism in the concerted evolution of Lycopersicon esculentum (tomato) genes encoding the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase.
- 1 June 1986
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 83 (11) , 3880-3884
- https://doi.org/10.1073/pnas.83.11.3880
Abstract
The nuclear gene sequences encoding RBCS, the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39) from several plants show extensive interspecific divergence but little intraspecific divergence, suggesting that these genes are evolving in concert within a genome. In this study, the nucleotide sequences of two tomato (Lycopersicon esculentum) RBCS genes and a cDNA clone containing the entire coding region of a third tomato RBCS gene were determined. The three genes, designated Rbcs-1, Rbcs-2A, and Rbcs-3A, each belong to a different one of the three RBCS loci in the tomato genome. The nucleotide sequence of Rbcs-1 differs from that of Rbcs-2A and Rbcs-3A by 13.9% and 13.1%, respectively. Rbcs-2A and Rbcs-3A differ from each other by 10.7%. A recently published RBCS gene sequence from tobacco (Nicotiana tabacum) [Mazur, B. J. & Chui, C.-F. (1985) Nucleic Acids Res. 13, 2373-2386] differs by 10.6% and 11.3% from Rbcs-2A and Rbcs-3A, respectively, and by 15.0% from Rbcs-1. Thus the tobacco gene seems to be phylogenetically as closely related to the tomato genes Rbcs-2A and Rbcs-3A as the latter two are to each other, and more closely related to them than Rbcs-1 is. However, the mature part of the polypeptide encoded by the tobacco RBCS gene differs by five and six amino acids from the corresponding region in the polypeptides encoded by Rbcs-2A and Rbcs-3A, respectively, while these two tomato RBCS polypeptides differ from each other in the mature part by a single amino acid. Rbcs-1, whose nucleotide sequence shows higher divergence from both the tobacco RBCS gene and Rbcs-2A and Rbcs-3A, encodes a polypeptide whose mature part differs by eight amino acids from the corresponding region in the tobacco polypeptide but only by three and four amino acids from the corresponding regions of Rbcs-2A- and Rbcs-3A-encoded polypeptides, respectively. Thus, it appears that in the tomato selection has maintained near uniformity of the coding information in the portion of the RBCS genes encoding the mature polypeptides.Keywords
This publication has 17 references indexed in Scilit:
- [57] Sequencing end-labeled DNA with base-specific chemical cleavagesPublished by Elsevier ,2004
- Molecular characterization and genetic mapping of two clusters of genes encoding chlorophyll a/b-binding proteins in Lycopersicon esculentum (tomato)Gene, 1985
- The petunia chlorophylla/bbinding protein genes: a comparison ofCabgenes from different gene familiesNucleic Acids Research, 1985
- Sequence of a genomic DNA clone for the small subunit of ribulose bis-phosphate carboxylase-oxygenase from tobaccoNucleic Acids Research, 1985
- 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.1983
- A number of different nuclear genes for the small subunit of RuBPCase are transcribed in petuniaNucleic Acids Research, 1983
- Characterisation of three cDNA clones encoding different mRNAs for the precursor to the small subunit of wheat ribulosebisphosphate carboxylaseNucleic Acids Research, 1983
- 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.1982
- Post-translational transport into intact chloroplasts of a precursor to the small subunit of ribulose-1,5-bisphosphate carboxylaseProceedings of the National Academy of Sciences, 1978
- Cell-free synthesis of leaf protein: Identification of an apparent precursor of the small subunit of ribulose-1,5-bisphosphate carboxylaseProceedings of the National Academy of Sciences, 1978