China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (11): 5371-5380.doi: 10.16431/j.cnki.1671-7236.2025.11.032

• Preventive Veterinary Medicine • Previous Articles    

Phylogenetic and Bioinformatics Analysis of HN Gene of Pigeon Paramyxovirus Type Ⅰ Epidemic Strains in Shanghai

LIU Jian1, ZHOU Jinping1, XU Weibing2, BAI Yilan3, YANG Xianchao1, GUI Yaping1, XIA Qiqi1, XU Feng1, SHEN Liping1, LIU Peihong4, WANG Jian1   

  1. 1. Shanghai Animal Disease Prevention and Control Center, Shanghai 201103, China;
    2. Shanghai Pudong New Area Datuan Town Economic Development Service Center, Shanghai 201311, China;
    3. Shanghai Pudong New District Husbandry and Aquaculture Technology Extension Center, Shanghai 201299, China;
    4. Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
  • Received:2025-01-08 Published:2025-10-30

Abstract: 【Objective】 The purpose of this study was to understand the genetic evolution of the HN gene of Pigeon paramyxovirus type Ⅰ (PPMV-1) epidemic strain in Shanghai,explore the reasons for PPMV-1 immune failure,and provide technical support for the development of new PPMV-1 vaccines and antiviral drugs. 【Method】 Samples (brain,trachea,lung,liver,pancreas and spleen) were collected from suspected PPMV-1 infected pigeons.PPMV-1 identification was performed on the sampless using RT-PCR.Positive samples were subjected to HN gene sequencing and genetic evolution analysis,and the structure and function of HN protein were analyzed using bioinformatics online software. 【Result】 The diseased pigeon was identified as PPMV-1 positive,with a HN gene length of 2 002 bp and a coding region of 1 716 bp,encoding 571 amino acids.It had the highest nucleotide similarity of 99.8% with the domestic isolate Pi/SH/CH/0617/2013 of PPMV-1,and only 83.6% and 85.5% nucleotide similarity with the Newcastle disease (NDV) vaccine strains La Sota and Mukteswar,respectively.Genetic evolution analysis showed that the prevalent strain belonged to NDV Class Ⅱ group Ⅵ.2.1.1.2.2 subtype,which was on the same branch as the domestic isolates Pi/SH/CH/0617/2013 and pigeon/Ningxia/2068/2016,but on different branches from La Sota and Mukteswar.HN protein was hydrophilic,the theoretical molecular weight,isoelectric point (pI),estimated half-life,instability index and fatty index of HN protein was about 62.71 ku,7.88,30 h,30.44 and 85.48,respectively.HN protein was mainly distributed in the mitochondria and cytoplasm,without signal peptides.It contained 1 transmembrane structure,5 potential N-glycosylation sites,105 O-glycosylation sites,13 cysteine residues and 75 phosphorylation sites.The prediction of secondary and tertiary structures of HN protein showed that random coil had the highest proportion,followed by beta sheet and alpha helix.The prediction of B cell antigenic epitopes showed that HN protein contained 10 antigenic epitopes (amino acid length ≥7). 【Conclusion】 PPMV-1 epidemic strain in Shanghai belonged to Class Ⅱ group Ⅵ.2.1.1.2.2 subtype of the NDV virulent strain.HN protein of the epidemic strain had a good antigenic epitope and could be used as a target protein for PPMV-1 vaccine development and antiviral therapy.The results provided theoretical basis for the genetic evolution of PPMV-1 HN gene,protein expression,development of novel vaccines,and screening of antiviral drugs.

Key words: Pigeon paramyxovirus type Ⅰ(PPMV-1); HN gene; phylogenetic analysis; bioinformatics analysis

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