China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (12): 5150-5161.doi: 10.16431/j.cnki.1671-7236.2024.12.004

• Biotechnology • Previous Articles    

Phylogenetic and Bioinformatics Analysis of F Gene of Pigeon Paramyxovirus Type Ⅰ from Shanghai Area

LIU Jian1, ZHOU Jinping1, SHEN Liping1, GUI Yaping1, GE Feifei1, WANG Xiaoxu1, YANG Xianchao1, LIU Peihong2, WANG Jian1   

  1. 1. Shanghai Animal Disease Prevention and Control Center, Shanghai 201103, China;
    2. Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
  • Received:2024-05-07 Published:2024-12-02

Abstract: 【Objective】 The purpose of this study was to understand the genetic variation of F gene of Pigeon paramyxovirus type Ⅰ (PPMV-1) epidemic strain in Shanghai area,analyze the bioinformatic characteristics of F protein,and provide technical support for the prevention and control of PPMV-1.【Method】 F gene of the isolate was amplified by RT-PCR,and sequencing and genetic evolution analysis were performed.The structure and function of F protein were predicted by online bioinformatics software.【Result】 The total length of the F gene coding region of the isolate was 1 662 bp,encoding 553 amino acids,and the F protein cleavage site sequence was 112R-R-Q-K-R-F117,which was consistent with the sequence structure of the virulent strain.Phylogenetic tree analysis showed that the isolate belonged to Class Ⅱ group Ⅵ.2.1.1.2.2 subtype of Newcastle disease virus (NDV).The isolate was in a different evolutionary branch from the vaccine strains La Sota and Mukteswar,and belonged to the same branch Ⅵ.2.1.1.2.2 with the domestic isolates Pi/SH/CH/0617/2013 and pigeon/Ningxia/2068/2016.The results of bioinformatics analysis showed that F protein was a hydrophilic protein with molecular mass of 59.03 ku,theoretical isoelectric point (pI) of 7.87,half-life period of 30 h,instability coefficient of 35.06 and fat coefficient of 109.73.F protein was mainly distributed in the plasma membrane and endoplasmic reticulum of the cell,and had a transmembrane structure and signaling peptides,including 6 potential N-glycosylation sites,13 cysteine residues,103 O-glycosylation sites,and 67 phosphorylation sites.In the secondary structure,alpha helix,random coil,extended chain and beta turn account for 46.11%,31.46%,18.08% and 4.34%,respectively.The predicted result of tertiary structure was consistent with the secondary structure.B-cell antigen site prediction showed that F protein contained 11 epitopes (amino acid number ≥7).【Conclusion】 The PPMV-1 isolate belonged to NDV Class Ⅱ group Ⅵ.2.1.1.2.2 subtype of NDV,and its F protein had a good epitope,which could be used as the target protein for PPMV-1 vaccine development and antiviral therapy.The results provided a certain reference for effective prevention and control of PPMV-1 infection,and also laid a foundation for further research and development of new vaccines.

Key words: Pigeon paramyxovirus type Ⅰ; F gene; phylogenetic; bioinformatics

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