Bioinformatics analysis of ubiquitin expression protein gene from Heterodera latipons

摘要

Ubiquitin expression protein DNA clone (Hl-UBI) was isolated from Heterodera latipons collected from North Jordan. Its sequence of 285 nucleotides was also determined and deposited in the GeneBank. The 285-bp open reading frame coded for 76-amino acid protein having two domains; the ubiquitin domain and the C terminal extension. The first 59 amino acids were predicted with the ubiquitin domain with identity percentages of 78% to ubiquitin of H. schachtii , 77% to polyubiquitin of Globodera pallida , 74% to ubiquitin of Globodera rostochiensis and 72% to ubiquitin of Heterodera glycines . The other domain at the C-terminus, containing 17 amino acids, showed no homology to any known protein. Sequence analysis showed a calculated encoding amino acids molecular weight of 8.77?kDa, theoretical isoelectric point?=?4.76, negatively charged residues?=?12, positively charged residues?=?9, extinction coefficient?=?1490, estimated half-life?=?30?h, instability index?=?32.51 and grand average of hydropathicity?=??0.537. The demonstrated subcellular localization analysis of cytoplasm, cell nucleus, mitochondrion, cell skeleton and plasma membrane of Hl-UBI protein occupied about 52.20, 21.70, 17.40, 4.30 and 4.30%, respectively. Sequence, homology and structural analysis confirmed that Hl-UBI gene was highly conserved during evolution and belonged to ubiquitin gene family.