Abstract
We have characterized three cDNA clones corresponding to proteins CM1, CM3 and CM16, which represent the three types of subunits of the wheat tetrameric inhibitor of insect α-amylases. The deduced amino acid sequences of the mature polypeptides are homologous to those of the dimeric and monomeric α-amylase inhibitors and of the trypsin inhibitors. The mature polypeptides are preceded by typical signal peptides. Southern blot analysis of appropriate aneuploids, using the cloned cDNAs as probes, has revealed the location of genes for subunits of the CM3 and of the CM16 type within a few kb of each other in chromosomes 4A, 4B and 4D, and those for the CM1 type of subunit in chromosomes 7A, 7B and 7D. Known subunits of the tetrameric inhibitor corresponding to genes from the B and D genomes have been previously characterized. No proteins of this class have been found to be encoded by the A genome in hexaploid wheat (genomes AA, BB, DD) or in diploid wheats (AA) and no anti α-amylase activity has been detected in the latter, so that the A-genome genes must be either silent (pseudogenes) or expressed at a much lower level.
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References
Aragoncillo C, Rodriguez-Loperena MA, Carbonero P, García-Olmedo F: Chromosomal control of non-gliadin proteins from the 70% ethanol extract of wheat endosperm. Theor Appl Genet 45: 322–326 (1975).
Barber D, Sanchez-Monge R, García-Olmedo F, Salcedo G, Mendez E: Evolutionary implications of sequential homologies among members of the trypsin/α-amylase inhibitor family (CM-proteins) in wheat and barley. Biochim Biophys Acta 873: 147–151 (1986).
Barber D, Sanchez-Monge R, Mendez E, Lazaro A, García-Olmedo F, Salcedo G: New α-amylase and trypsin inhibitors among the CM-proteins of barley (Hordeum vulgare). Biochim Biophys Acta 869: 115–118 (1986).
Bedetti C, Bozzini A, Silano V, Vittozzi L: Amylase protein inhibitors and the role of Aegilops species in polyploid wheat speciation. Biochim Biophys Acta 362: 299–307 (1974).
Buonocore V, DeBiasi M-G, Giardina P, Poerio E, Silano V: Purification and properties of an α-amylase tetrameric inhibitor from wheat kernel. Biochim Biophys Acta 831: 40–48 (1985).
Campos FAP, Richardson M: The complete amino acid sequence of the bifunctional α-amylase/trypsin inhibitor from seeds of ragi (Indian finger millet; Eleusine coracana Goertn). FEBS Lett 152: 300–304 (1983).
Feinberg AP, Vogelstein B: A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity. Anal Biochem 132: 6–13 (1983).
García-Olmedo F, Carbonero P: Homoeologous protein synthesis controlled by homoeologous chromosomes in wheat. Phytochemistry 9: 1495–1497 (1970).
García-Olmedo F, Carbonero P, Jones BL: Chromosomal locations of genes that control wheat endosperm proteins. In: Pomeranz Y (ed) Advances in Cereal Science and Technology, vol 5, pp. 1–47. American Association of Cereal Chemists, St Paul, MN (1982).
García-Olmedo F, Salcedo G, Sanchez-Monge R, Gomez L, Royo J, Carbonero P: Plant proteinaceous inhibitors of proteinases and α-amylases. In: Miflin B (ed) Oxford Surveys of Plant Molecular and Cell Biology, vol 4, pp. 275–334. Oxford University Press, Oxford (1987).
Gomez L, Sanchez-Monge R, García-Olmedo F, Salcedo G: Wheat tetrameric inhibitors of insect α-amylases: alloploid heterosis at the molecular level. Proc Natl Acad Sci USA 86: 3242–3246 (1989).
Halford NG, Morris NA, Urwin P, Williamson MS, Kasarda DD, Lew EJ-L, Kreis M, Shewry P: Molecular cloning of the barley seed protein CMd: a variant member of the α-amylase/trypsin inhibitor family of cereals. Biochim Biophys Acta 950: 435–440 (1988).
Hoop TP, Woods KR: Prediction of protein antigenic determinants from amino acid sequences. Proc Natl Acad Sci USA 78: 3824–3828 (1981).
Kashlan N, Richardson M: The complete amino acid sequence of a major wheat protein inhibitor of α-amylase. Phytochemistry 20: 1781–1784 (1981).
Kreis M, Forde BG, Rahman S, Miflin BJ, Shewry PR: Molecular evolution of the seed storage proteins of barley, rye and wheat. J Mol Biol 183: 499–502 (1985).
Lazaro A, Rodriguez-Palenzuela P, Maraña C, Carbonero P, García-Olmedo F: Signal peptide homology between the sweet protein thaumatin II and unrelated cereal α-amylase/trypsin inhibitors. FEBS Lett 239: 147–150 (1988).
Lazaro A, Sanchez-Monge R, Salcedo G, Paz-Ares J, Carbonero P, García-Olmedo F: A dimeric inhibitor of insect α-amylase from barley. Cloning of the cDNA and identification of the protein. Eur J Biochem 172: 129–134 (1988).
Lyons A, Richardson M, Tatham AS, Shewry PR: Characterization of homologous inhibitors of trypsin and α-amylase from seeds of rye (Secale cereale L.). Biochim Biophys Acta 915: 305–313 (1987).
Maeda K, Kakabayashi S, Matsubara H: Complete amino acid sequence of an α-amylase inhibitor in wheat kernel (0.19 inhibitor). Biochim Biophys Acta 828: 213–221 (1985).
Maeda K, Takamori Y, Oka O: Isolation and properties of an α-amylase inhibitor (0.53) from wheat (Triticum aestivum). Agric Biol Chem 46: 2873–2875 (1982).
Mahoney WC, Hermodson MA, Jones B, Powers DD, Corfman RS, Reeck GR: Amino acid sequence and secondary structural analysis of the corn inhibitor of trypsin and activated Hageman factor. J Biol Chem 259: 8412–8416 (1984).
Maniatis T, Fritsch EF, Sambrook J: Molecular Cloning: A Laboratory Manual. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY (1982).
Maraña C, García-Olmedo F, Carbonero P: Linked sucrose synthase genes in group-7 chromosomes in hexaploid wheat (Triticum aestivum L.). Gene 63: 253–260 (1988).
Murray MG, Thompson WF: Rapid isolation of high molecular weight plant DNA. Nucl Acids Res 8: 4321–4325 (1980).
Odani S, Koide T, Ono T: The complete amino acid sequence of barley trypsin inhibitor. J Biol Chem 258: 7998–8003 (1983).
O'Connor CM, McGeeney KF: Isolation and characterization of four inhibitors from wheat flour which display differential inhibition specificities for human salivary and human pancreatic α-amylase. Biochim Biophys Acta 658: 387–396 (1981).
O'Connor CM, McGeeney KF: Interaction of human α-amylases with inhibitors from wheat flour. Biochim Biophys Acta 658: 397–405 (1981).
Paz-Ares J, Ponz F, Aragoncillo C, Hernandez-Lucas C, Salcedo G, Carbonero P, García-Olmedo F: In vivo and in vitro synthesis of CM-proteins (A-hordeins) from barley (Hordeum vulgare L.). Planta 157: 74–80 (1983).
Paz-Ares J, Ponz F, Rodriguez-Palenzuela P, Lazaro A, Hernandez-Lucas C, García-Olmedo F, Carbonero P: Characterization of cDNA clones of the family of trypsin/α-amylase inhibitors (CM-proteins) in barley (Hordeum vulgare L.). Theor Appl Genet 71: 842–846 (1986).
Petrucci T, Tomasi M, Cantagalli P, Silano V: Comparison of wheat albumin inhibitors of α-amylase and trypsin. Phytochemistry 13: 2487–2495 (1974).
Rodriguez-Palenzuela P, Royo J, Gomez L, Sanchez-Monge R, Salcedo G, Molina-Cano JL, García-Olmedo F, Carbonero P: The gene for trypsin inhibitor CMe is regulated in trans by the lys 3a locus in the endosperm of barley (Hordeum vulgare L.). Mol Gen Genet 219: 474–479 (1989).
Salcedo G, Fra-Mon P, Molina-Cano JL, Aragoncillo C, García-Olmedo F: Genetics of CM-proteins (Ahordeins) in barley. Theor Appl Genet 68: 53–59 (1984).
Salcedo G, Rodriguez-Loperena MA, Aragoncillo C: Relationship among low MW hydrophobic proteins from wheat endosperm. Phytochemistry 17: 1491–1494 (1978).
Sanchez-Monge R, Fernandez JA, Salcedo G: Subunits of tetrameric α-amylase inhibitors of Hordeum chilense are coded by genes located in chromosome 4Hch and 7Hch. Theor Appl Genet 74: 811–816 (1987).
Sanchez-Monge R, Gomez L, García-Olmedo F, Salcedo G: A tetrameric inhibitor of insect α-amylase from barley. FEBS Lett 207: 105–109 (1986).
Sanger F, Nicklen S, Coulson AR: DNA sequencing with chain terminating inhibitors. Proc Natl Acad Sci USA 74: 5463–5467 (1977).
Shewry PR, Lafiandra D, Salcedo G, Aragoncillo C, García-Olmedo F, Lew EJ-L, Dietler MD, Kasarda DD: N-terminal amino acid sequences of chloroform/ methanol-soluble proteins and albumins from endosperm of wheat, barley and related species. FEBS Lett 175: 359–363 (1984).
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García-Maroto, F., Maraña, C., Mena, M. et al. Cloning of cDNA and chromosomal location of genes encoding the three types of subunits of the wheat tetrameric inhibitor of insect α-amylase. Plant Mol Biol 14, 845–853 (1990). https://doi.org/10.1007/BF00016517
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DOI: https://doi.org/10.1007/BF00016517