The entry of Newcastle disease virus (NDV), a prototype paramyxovirus, is directed by two virion glycoproteins, the hemagglutinin-neuraminidase (HN) protein and the fusion (F) protein . HN protein, the virus attachment protein, binds to sialic acid-containing receptors, and F protein mediates membrane fusion. In contrast to many viral fusion proteins, paramyxovirus F proteins do not require the acid pH of endosomes to activate fusion activity. As a consequence, infected cells expressing both attachment proteins and F proteins can fuse with adjacent cells to form multinuclear cells, or syncytia, a process that is assumed to mimic virus-cell fusion .
产品应用
应用
已检合格种属
预测种属
推荐稀释比例
ELISA
Newcastle disease virus
1:5000-10000
交叉反应
交叉反应: (predicted: Newcastle disease virus)
相关产品
暂无相关产品
靶标
基因名
HN
蛋白名
Hemagglutinin-neuraminidase
亚基
Homotrimer of disulfide-linked F1-F2.
亚细胞定位
Virion membrane {ECO:0000250}; Single-pass type I membrane protein {ECO:0000250}. Host cell membrane {ECO:0000250}; Single-pass membrane protein {ECO:0000250}.
翻译后修饰
The inactive precursor F0 is glycosylated and proteolytically cleaved into F1 and F2 to be functionally active. The cleavage is mediated by cellular proteases during the transport and maturation of the polypeptide (By similarity). {ECO:0000250}.
相似性
Belongs to the paramyxoviruses fusion glycoprotein family.
功能
Class I viral fusion protein. Under the current model, the protein has at least 3 conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and plasma cell membrane fusion, the heptad repeat (HR) regions assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and plasma cell membranes. Directs fusion of viral and cellular membranes leading to delivery of the nucleocapsid into the cytoplasm. This fusion is pH independent and occurs directly at the outer cell membrane. The trimer of F1-F2 (F protein) probably interacts with HN at the virion surface. Upon HN binding to its cellular receptor, the hydrophobic fusion peptide is unmasked and interacts with the cellular membrane, inducing the fusion between cell and virion membranes. Later in infection, F proteins expressed at the plasma membrane of infected cells could mediate fusion with adjacent cells to form syncytia, a cytopathic effect that could lead to tissue necrosis.