Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l.
Апстракт
Gliadins, as the major components of wheat storage proteins, determine the extensibility properties of dough and have important effects on flour processing quality. Wheat related species carries potential storage protein gene resources for quality improvement. In this study, we isolated and characterized the first complete omega-gliadin gene Omega-AS from Aegilops speltoides L. (2n = 2x = 14, SS) by allelic-specific PCR and investigated its phylogenetic relationships among Triticum and Aegilops species. Molecular structure showed that Omega-AS gene consisted of 1122 bp encoding 373 amino acid residues with deduced molecular mass 41379.21 Da. Omega-AS gene was exceptionally rich in prolines and glutamines with fewer methionine and no cysteine. Sequence characterization and epitope analysis showed that three epitopes QQPIPVQPQQ, TQPQQPTPIQ and IQPQQPFPQQ were absent in Omega-AS gene encoded protein, indicating its potential value for wheat quality improvement with less toxic, or no toxic... peptides. Phylogenetic analysis revealed that Omega-AS was closely related to gliadin genes of wheat and related species and its divergence from bread wheat was more recently (less than 1.243 MYA). Heterologous expression showed that Omega-AS gene could successfully express with a high level in E. coli under the control of T-7 promoter. The transcription expression pattern of Omega AS gene during grain development detected by qRT-PCR revealed that the highest expression level occurred at 17 days post anthesis.
Кључне речи:
Aegilops speltoides / omega-gliadins / phylogenetics / epitopes / heterologous expressionИзвор:
Genetika, 2018, 50, 2, 503-517Издавач:
- Društvo genetičara Srbije, Beograd
Финансирање / пројекти:
- National Key R & D Program of China [2016YFD0100502, 2016ZX08009003-004]
- National Natural Science Foundation of China (NSFC) [31471485]
DOI: 10.2298/GENSR1802503W
ISSN: 0534-0012
WoS: 000442685800013
Scopus: 2-s2.0-85056228255
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Wang, Wanqing AU - Wang, Ke AU - Chen, Xi AU - Prodanović, Slaven AU - Li, Xiaohui AU - Ye, Xingguo AU - Yan, Yueming PY - 2018 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/4648 AB - Gliadins, as the major components of wheat storage proteins, determine the extensibility properties of dough and have important effects on flour processing quality. Wheat related species carries potential storage protein gene resources for quality improvement. In this study, we isolated and characterized the first complete omega-gliadin gene Omega-AS from Aegilops speltoides L. (2n = 2x = 14, SS) by allelic-specific PCR and investigated its phylogenetic relationships among Triticum and Aegilops species. Molecular structure showed that Omega-AS gene consisted of 1122 bp encoding 373 amino acid residues with deduced molecular mass 41379.21 Da. Omega-AS gene was exceptionally rich in prolines and glutamines with fewer methionine and no cysteine. Sequence characterization and epitope analysis showed that three epitopes QQPIPVQPQQ, TQPQQPTPIQ and IQPQQPFPQQ were absent in Omega-AS gene encoded protein, indicating its potential value for wheat quality improvement with less toxic, or no toxic peptides. Phylogenetic analysis revealed that Omega-AS was closely related to gliadin genes of wheat and related species and its divergence from bread wheat was more recently (less than 1.243 MYA). Heterologous expression showed that Omega-AS gene could successfully express with a high level in E. coli under the control of T-7 promoter. The transcription expression pattern of Omega AS gene during grain development detected by qRT-PCR revealed that the highest expression level occurred at 17 days post anthesis. PB - Društvo genetičara Srbije, Beograd T2 - Genetika T1 - Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l. EP - 517 IS - 2 SP - 503 VL - 50 DO - 10.2298/GENSR1802503W ER -
@article{ author = "Wang, Wanqing and Wang, Ke and Chen, Xi and Prodanović, Slaven and Li, Xiaohui and Ye, Xingguo and Yan, Yueming", year = "2018", abstract = "Gliadins, as the major components of wheat storage proteins, determine the extensibility properties of dough and have important effects on flour processing quality. Wheat related species carries potential storage protein gene resources for quality improvement. In this study, we isolated and characterized the first complete omega-gliadin gene Omega-AS from Aegilops speltoides L. (2n = 2x = 14, SS) by allelic-specific PCR and investigated its phylogenetic relationships among Triticum and Aegilops species. Molecular structure showed that Omega-AS gene consisted of 1122 bp encoding 373 amino acid residues with deduced molecular mass 41379.21 Da. Omega-AS gene was exceptionally rich in prolines and glutamines with fewer methionine and no cysteine. Sequence characterization and epitope analysis showed that three epitopes QQPIPVQPQQ, TQPQQPTPIQ and IQPQQPFPQQ were absent in Omega-AS gene encoded protein, indicating its potential value for wheat quality improvement with less toxic, or no toxic peptides. Phylogenetic analysis revealed that Omega-AS was closely related to gliadin genes of wheat and related species and its divergence from bread wheat was more recently (less than 1.243 MYA). Heterologous expression showed that Omega-AS gene could successfully express with a high level in E. coli under the control of T-7 promoter. The transcription expression pattern of Omega AS gene during grain development detected by qRT-PCR revealed that the highest expression level occurred at 17 days post anthesis.", publisher = "Društvo genetičara Srbije, Beograd", journal = "Genetika", title = "Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l.", pages = "517-503", number = "2", volume = "50", doi = "10.2298/GENSR1802503W" }
Wang, W., Wang, K., Chen, X., Prodanović, S., Li, X., Ye, X.,& Yan, Y.. (2018). Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l.. in Genetika Društvo genetičara Srbije, Beograd., 50(2), 503-517. https://doi.org/10.2298/GENSR1802503W
Wang W, Wang K, Chen X, Prodanović S, Li X, Ye X, Yan Y. Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l.. in Genetika. 2018;50(2):503-517. doi:10.2298/GENSR1802503W .
Wang, Wanqing, Wang, Ke, Chen, Xi, Prodanović, Slaven, Li, Xiaohui, Ye, Xingguo, Yan, Yueming, "Molecular characterization and phylogenetic analysis of one omega-gliadin gene from aegilops speltoides l." in Genetika, 50, no. 2 (2018):503-517, https://doi.org/10.2298/GENSR1802503W . .