مورد إلكتروني
Expansion of the gamma-gliadin gene family in Aegilops and Triticum
| العنوان: | Expansion of the gamma-gliadin gene family in Aegilops and Triticum |
|---|---|
| المصدر: | ISSN: 1471-2148 |
| بيانات النشر: | 2012 |
| تفاصيل مُضافة: | Goryunova, S.V. Salentijn, E.M.J. Chikida, N.N. Kochieva, E.Z. van der Meer, I.M. Gilissen, L.J.W.J. Smulders, M.J.M. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Background - The gamma-gliadins are considered to be the oldest of the gliadin family of storage proteins in Aegilops/Triticum. However, the expansion of this multigene family has not been studied in an evolutionary perspective. Results - We have cloned 59 gamma-gliadin genes from Aegilops and Triticum species (Aegilops caudata L., Aegilops comosa Sm. in Sibth. & Sm., Aegilops mutica Boiss., Aegilops speltoides Tausch, Aegilops tauschii Coss., Aegilops umbellulata Zhuk., Aegilops uniaristata Vis., and Triticum monococcum L.) representing eight different genomes: Am, B/S, C, D, M, N, T and U. Overall, 15% of the sequences contained internal stop codons resulting in pseudogenes, but this percentage was variable among genomes, up to over 50% in Ae. umbellulata. The most common length of the deduced protein, including the signal peptide, was 302 amino acids, but the length varied from 215 to 362 amino acids, both obtained from Ae. speltoides. Most genes encoded proteins with eight cysteines. However, all Aegilops species had genes that encoded a gamma-gliadin protein of 302 amino acids with an additional cysteine. These conserved nine-cysteine gamma-gliadins may perform a specific function, possibly as chain terminators in gluten network formation in protein bodies during endosperm development. A phylogenetic analysis of gamma-gliadins derived from Aegilops and Triticum species and the related genera Lophopyrum, Crithopsis, and Dasypyrum showed six groups of genes. Most Aegilops species contained gamma-gliadin genes from several of these groups, which also included sequences from the genera Lophopyrum, Crithopsis, and Dasypyrum. Hordein and secalin sequences formed separate groups. Conclusions - We present a model for the evolution of the gamma-gliadins from which we deduce that the most recent common ancestor (MRCA) of Aegilops/Triticum-Dasypyrum-Lophopyrum-Crithopsis already had four groups of gamma-gliadin sequences, presumably the result of two rounds of duplication |
| مصطلحات الفهرس: | bread wheat, chloroplast dna, common wheat, molecular-cloning, phylogenetic analysis, repeated nucleotide-sequences, restriction fragment analysis, rna interference, storage proteins, t-cell epitopes, info:eu-repo/semantics/article, Article/Letter to editor, info:eu-repo/semantics/publishedVersion |
| URL: | |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess Wageningen University & Research |
| ملاحظة: | application/pdf BMC Evolutionary Biology 12 (2012) ISSN: 1471-2148 ISSN: 1471-2148 English |
| أرقام أخرى: | NLWUP oai:library.wur.nl:wurpubs/430757 https://research.wur.nl/en/publications/expansion-of-the-gamma-gliadin-gene-family-in-aegilops-and-triticTest 10.1186/1471-2148-12-215 1200334280 |
| المصدر المساهم: | WUR STAFF PUBNS From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1200334280 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |