Abstract
The low-molecular-weight (LMW) glutenin subunits are important for the aspects of wheat quality and dough processing, and the LMW-i type glutenin is one of the typical glutenins. However, a detailed description of the DNA structures and encoded polypeptides of the LMW-i type glutenin subunit gene family is still lacking. In this study, two LMW-i type glutenin subunit genes, i.e., LMW-Eb from T. boeoticum and LMW-Em from T. monococcum, were obtained from genomic DNA, respectively. The LMW-Eb is a novel gene and the LMW-Em has an identical sequence with a known gene. To comprehensively understand the LMW-i type glutenin subunit gene family structure, all known LMW-i type glutenin subunit genes were comparatively analyzed. Detailed comparison of these genes revealed a high-level of single nucleotide polymorphisms (SNPs). In these LMW glutenin subunits, the percentage of glutamine and proline were approximately 38.27 and 12.77%, respectively. They started directly from the repetitive domain with ISQQQ-after the signal sequences, in which the N-terminal regions were absent. In addition, there are three consensus repeat motifs (i.e., PPFSQQQQ-, PPISQQQQ-, and PPYSQQQQ) in the repetitive domains of these LMW glutenin subunits. The C-terminal I domain is the most conserved region, while the domains of C-terminal II and III are more variable. The eight cysteine residues are highly conserved. These genes could be clustered into two major groups, among which, one group could be further divided into 5 subgroups. Furthermore, to date, all known LMW-i type glutenin subunit genes are located on chromosome 1A, whereas no LMW-i type glutenin subunit gene is obtained from the B and D genomes in wheat.
Similar content being viewed by others
References
Ciaffi M., Lee Y.K., Tamas L., Gupta L. 1999. The low-molecular-weight glutenin subunit proteins of primitive wheats: 3. The genes from D-genome species. Theor. Appl. Genet. 98, 135–148.
D’Ovidio R., Masci S. 2004. The low-molecular-weight glutenin subunits of wheat gluten. J. Cereal Sci. 39, 321–329.
Shang H.Y., Wei Y. M., Long H., Yan Z.H., Zheng Y.L. 2005. Identification of LMW glutenin like genes from Secale sylvestre Host. Russ. J. Genet. 41, 1372–1380.
Yue Y.W., Long H., Liu Q., Wei Y.M., Yan Z.H., Zheng Y.L. 2005. Isolation of low-molecular-weight glutenin subunit genes from wild emmer wheat (Triticum dicoccoides). J. Appl. Genet. 46, 349–355.
Hou Y.C., Liu Q., Long H., Wei Y.M., Zheng Y.L. 2006. Characterization of low-molecular-weight glutenin subunit genes from Hordeum brevisubulatum ssp. turkestanicum. Biol. Bulletin. 1, 44–51.
Pitts E.G., Rafalski J.A., Hedgcoth C. 1988. Nucleotide sequence and encoded amino acid sequence of a genomic gene region for a low molecular weight glutenin. Nucleic Acids Res. 16, 11,376.
Cassidy B.G., Dvorak J., Anderson O.D. 1998. The wheat low-molecular-weight glutenin genes: Characterization of six new genes and progress in understanding gene family structure. Theor. Appl. Genet. 96, 743–750.
Cloutier S., Rampitsch C., Penner G.A., Lukow O.M. 2001. Cloning and expression of a LMW-i glutenin gene. J. Cereal Sci. 33, 143–154.
Maruyama N., Ichise K.T., Kishimoto T., Kawase S., Matsumura Y., Takeuchi Y., Sawada T., Utsumi S. 1998. Identification of major wheat allelic genes by means of the Escherichia coli expression system. Eur. J. Biochem. 255, 739–745.
Ikeda T.M., Nagamine T., Fukuoka H., Yano H. 2002. Identification of new low molecular weight glutenin subunit genes in wheat. Theor. Appl. Genet. 104, 680–687.
Wicker T., Yahiaoui N., Guyot R., Schlagenhauf E., Liu Z.D., Dubcovsky J., Keller B. 2003. Rapid genome divergence at orthologous low molecular weight glutenin loci of the A and Am genomes of wheat. Plant Cell. 15, 1186–1197.
Zhang W., Gianibelli M.C., Rampling L.R., Gale K.R. 2004. Characterisation and marker development for low molecular weight glutenin genes from Glu-A3 alleles of bread wheat (Triticum aestivum L.). Theor. Appl. Genet. 108, 1409–1419.
Lee Y.K., Caiffi M., Gupta R., Appels R., Morell M.K. 1999. The low-molecular-weight glutenin subunit proteins of primitive wheats: 2. The genes from A-genome species. Theor. Appl. Genet. 98, 126–134.
Devos K.M., Alkinson M.D., Chinoy C.N., Liu C.J., Gale M.D. 1992. RFLP-based genetic map of the homologous group 3 chromosomes of wheat and rye. Theor. Appl. Genet. 83, 931–937.
Colot V., Bartels D., Thompson C., Flavell R. 1989. Molecular characterization of an active wheat LMW glutenin gene and its relation to other wheat and barley prolamin genes. Mol. Gen. Genet. 216, 81–90.
Thompson J.D., Higgins D.G., Gibson T.J. 1994. Clustal W: Improving the sensitivity of progressive multiple sequence alignment through sequence weighting matrix choice. Nucleic Acids Res. 22, 4673–4680.
Nei N., Kumar S. 2000. Molecular Evolution and Phylogenetics. Oxford, UK: Oxford Univ. Press.
Singh N.K., Sheherd K.W. 1988. Linkage mapping of genes controlling endosperm storage proteins in wheat. Genes on the short arms of group-1 chromosomes. Theor. Appl. Genet. 75, 628–641.
Long H., Wei Y.M., Yan Z.H., Baum B., Nevo E., Zheng Y.L. 2005. Classification of wheat low-molecular-weight glutenin subunit genes and its chromosome assignment by developing LMW-GS group-specific primers. Theor. Appl. Genet. 111, 1251–1259.
Long H., Wei Y.M., Yan Z.H., Baum B., Nevo E., Zheng Y.L. 2006. Analysis and validation of genome-specific DNA variations in 5′ flanking conserved sequences of wheat low-molecular-weight glutenin subunit genes. Sci. China Ser. C Life Sci. 49, 322–331.
Anderson D.D., Greene F.C. 1997. The a-gliadin gene family: 2. DNA and protein sequence variation, subfamily structure, and origins of pseudogenes. Theor. Appl. Genet. 95, 59–65.
Masic S., D’Ovidio R., Lafiandra D., Kasarda D.D. 1998. Characterization of a low-molecular-weight glutenin subunit gene from bread wheat and the corresponding protein that represents a major subunit of the glutenin polymer. Plant Physiol. 118, 1147–1158.
Anderson D.D., Hsia C.C., Torres V. 2001. The wheat γ-gliadin genes: Characterization of ten new sequences and further understanding of γ-gliadin gene family structure. Theor. Appl. Genet. 103, 323–330.
Sun M.M., Yan Y.M., Jiang Y., Xiao Y., Hu Y., Cai M., Li Y., Hsam S.L., Zeller F.J. 2004. Molecular cloning and comparative analysis of a y-type inactive HMW glutenin subunit gene from cultivated emmer wheat (Triticum dicoccum L.). Hereditas. 141, 46–54.
Qi P.F., Wei Y.M., Yan Z.H., Zheng Y.L. 2006. Biochemical and molecular characterization of gliadins. Mol. Biol. 40, 713–723.
D’Ovidio R., Marchitelli C., Ercoli Cardelli L., Porceddu E. 1999. Sequence similarity between allelic Glu-B3 genes related to quality properties of durum wheat. Theor. Appl. Genet. 98, 455–461.
Müller S., Wieser H. 1997. The location of disulphide bonds in monomeric γ-type gliadins. J. Cereal Sci. 26, 169–176.
Rafalski J.A. 1986. Structure of wheat gamma-gliadin genes. Gene. 43, 221–229.
Kwok P.Y., Deng Q., Zakeri H., Taylor S.L., Nickerson D.A. 1996. Increasing the information content of STS-based genome maps: Identifying polymorphisms in mapped STSs. Genomics. 31, 123–126.
Kruglyak L. 1997. The use of a genetic map of biallelic markers in linkage studies. Nature Genet. 17, 21–24.
Sachidanandam R. et al. (The international SNP Map Working Group). 2001. A map of human genome sequence variation containing 1042 million single nucleotide polymorphisms. Nature. 409, 928–933.
Giroux M.J., Morris C.F. 1997. A glycine to serine change in pyroindoline b is associated with wheat grain hardness and low levels of starch-surface friabilin. Theor. Appl. Genet. 95, 857–864.
Ellis M.H., Spielmeyer W., Gale K.R., Rebetzke G.J., Richards R.A. 2002. Perfect markers for the Rht-B1b and Rht-D1b dwarfing genes in wheat. Theor. Appl. Genet. 105, 1038–1042.
Gale K.R., Ma W., Zhang W., Ramplig L., Hill A.S., Appels R., Morris P., Morell M. 2001. Simple high-throughput DNA markers for genotyping in wheat. In: Proc. 10th Aust. Wheat Breed Assemby. Eds Eastwood R., Hollamby G., Rathgen A., Gororo N. Mildura, pp. 26–31.
Zhang W., Gianibelli M.C., Ma W., Ramoling L., Gale K.R. 2003. Identification of SNPs and development of allele-specific PCR markers for γ-gliadin alleles in Triticum aestivum. Theor. Appl. Genet. 107, 130–138.
Byran G., Stephenson P., Collins A., Kirby J., Smith J.B., Gale M.D. 1999. Low levels of DNA sequence variation among adapted genotypes of hexaploid wheat. Theor. Appl. Genet. 99, 192–198.
Huang S., Sirikhachornkit A., Su X., Faris J., Gill B., Haselkorn R., Gornicki P. 1979. Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of Triticum-Aegilops complex and the evolutionary history of polyploid wheat. Proc. Natl. Acad. Sci. USA. 76, 5269–5273.
Ozkan H., Levy A.A. 2001. Allopolyploidy-induced rapid genome evolution in the wheat (Aegilops-Triticum) group. Plant Cell. 13, 1735–1747.
Shaked H., Kashkush K., Ozkan H., Feldman M., Levy A.A. 2001. Sequence elimination and cytosine methylation are rapid and reproducible responses of the genome to wide hybridization and allopolyploidy in wheat. Plant Cell. 13, 1749–1759.
Dovrak J., McGuire P.E., Cassidy B. 1988. Apparent sources of the A genomes of wheats inferred from polymorphism in abundance and restriction fragment length of repeated nucleotide sequences. Genome. 30, 680–689.
Kudryavtsev A.M., Metakovsky E.V., Sozinov A.A. 1988. Polymorphism and inheritance of gliadin components controlled by chromosome 6A of spring durum wheat. Biochem. Genetics. 26, 693–703.
Metakovsky E.V., Baboev S.K. 1992. Polymorphism of gliadin and unusual gliadin alleles in Triticum boeoticum. Genome. 35, 1007–1012.
Metakovsky E.V., Kudryavtsev A.M., Iakobashvili Z.A., Novoselskaya A.Y. 1989. Analysis of phylogenetic relations of durum, carthlicum, and common wheats by means of comparison alleles of gliadin-coding loci. Theor. Appl. Genet. 77, 881–887.
Author information
Authors and Affiliations
Additional information
Published in Russian in Molekulyarnaya Biologiya, 2006, Vol. 40. No. 6, pp. 996–1005
The article was submitted by the authors in English.
Rights and permissions
About this article
Cite this article
Ma, Z.C., Wei, Y.M., Long, H. et al. Characterization of low-molecular-weight i-type glutenin subunit genes from diploid wheat in relation to the gene family structure. Mol Biol 40, 897–906 (2006). https://doi.org/10.1134/S0026893306060082
Received:
Issue Date:
DOI: https://doi.org/10.1134/S0026893306060082