Isolation and Genome-wide Evolutionary Analysis of Novel Variant Porcine parvovirus Type 1 in Shandong Province
Yongle YU, Yanzhu YAO, Ruihua ZHANG, Chao CHEN, Ting ZHAO, Hu SHAN, Xianjie HAN
Isolation and Genome-wide Evolutionary Analysis of Novel Variant Porcine parvovirus Type 1 in Shandong Province
It conducted to analyze the biological characteristics of Porcine parvovirus type 1 (PPV1) mutant strains.The PPV was isolated and cultured from 67 aborted fetal tissue samples collected from pig farms in different regions of Shandong Province,and identified by electron microscopy and IFA test.DNAMAN V6 was used to demonstrate and compare the secondary structures of 5'UTR and 3'UTR,MEGA V7 was used for genetic evolutionary analysis,and finally the multi-step growth curve was used to compare the proliferation ability of the isolates in susceptible cells.Three strains were isolated and identified as PPV type 1 strains,named SDPV1,SDPV2 and SDPV3,with GenBank accession numbers ON924737,ON924738 and ON924739,respectively;the whole gene sequence lengths of the three isolates were basically the same,among which the 5'-UTR sequence was highly conserved and had a Y-shaped structure,while the 3' UTR had a U-shaped structure with some differences in individual bases;there were five non-synonymous mutation sites in the amino acid sequence of VP2,namely T20A,R82K,Q226E,D366N and K407N,which were found for the first time in domestic strains.The growth curve showed that the mutant strain had a relatively fast growth trend,with a 10-fold difference in the highest titer compared with the PPV-QN strain.It reported the genomic characteristics of PPV strains containing novel mutant loci.
Porcine parvovirus type 1 / Mutant strain / Whole genome / Genetic variation {{custom_keyword}} /
Tab.1 Information of primer sequences表1 引物序列信息 |
序号 No. | 引物 Primer | 引物序列(5'—3') Primer sequence(5'—3') | 片段大小/bp Fragment size |
---|---|---|---|
1 | Y1 | F:AATCTTTAAACTGACCAACT | 90 |
R: ATGGTGACGTGTGACTGCCG | |||
2 | Y2 | F: CTTCGGCAGTCACACGTCACCA | 321 |
R: TAAATACATAAGAGAATGC | |||
3 | C1 | F: GGCTTCAAGATAATGCTCAA | 1 900 |
R: CAGGCTCTTATGTCGGTTTCTA | |||
4 | C2 | F: ACAATGCAGCCAATGTGAACT | 1 879 |
R: ATTGAGTTGGTTTTGTAGGTA | |||
5 | C3 | F: TCTGCAACAGGAAATGAATC | 1 967 |
R: GACATAAGGTCATATAAGTGTG | |||
6 | U1 | F: AACCTAGACTACATGTTACAGC | 674 |
R: AGAGCCGCTTGGTTAGTCG | |||
7 | U2 | F: GTATTCCTTTGAGTTAGTTG | 158 |
R: AACTAAACCAACCACACTTA |
Tab.2 The background of reference strains表2 参考毒株信息 |
毒株 Strain | 基因登录号 GenBank No. | 收集时间 Collection date | 国家 Country |
---|---|---|---|
BQ | EU790641 | 2006 | 中国 |
Taian | FJ853421 | 2008 | 中国 |
HN-2011 | JX992846 | 2008 | 中国 |
GD2013 | KX242359 | 2013 | 中国 |
HNLY201301 | MF447833 | 2013 | 中国 |
SDQD20200424-830 | MZ577027 | 2020 | 中国 |
JSYZ20170418-30 | MZ577026 | 2017 | 中国 |
DJH23 | MK092383 | 2015 | 中国 |
HuN 1 | MH183298 | 2015 | 中国 |
China-XY | MK993540 | 2017 | 中国 |
PPV2010 | JN872448 | 2010 | 中国 |
1242-2012 | MH558678 | 2012 | 意大利 |
J-PPV | KF742500 | 2013 | 中国 |
27a | AY684871 | 2004 | 德国 |
15425 | JN400520 | 2011 | 德国 |
Kresse | U44978 | 1996 | 加拿大 |
NADL-2 | KF913345 | 2012 | 匈牙利 |
Tab.3 The genome sequences of three PPV isolates表3 分离株全基因组序列信息 |
毒株 Strain | 基因登录号 GenBank No. | 基因组大小/bp Genome | 5'-UTR | 3'-UTR | NS1 | NS2 | NS3 | VP1 | VP2 |
---|---|---|---|---|---|---|---|---|---|
SDPV1 | ON924737 | 5 076 | 291 | 527 | 1 989 | 486 | 324 | 2 190 | 1 740 |
SDPV2 | ON924738 | 5 078 | 291 | 529 | 1 989 | 486 | 324 | 2 190 | 1 740 |
SDPV3 | ON924739 | 5 076 | 291 | 527 | 1 989 | 486 | 324 | 2 190 | 1 740 |
Tab.4 Amino acid sequence variations in the VP2 of three PPV strains表4 分离株VP2蛋白氨基酸序列中非同义突变位点 |
PPV毒株 PPV isolate | VP2 | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
20 | 82 | 144 | 226 | 228 | 320 | 366 | 378 | 383 | 407 | 414 | 419 | 436 | 565 | |
SDPV1 | A | R | A | E | Q | T | D | G | Q | K | A | Q | S | K |
SDPV2 | T | K | A | Q | Q | T | D | G | Q | N | A | Q | S | K |
SDPV3 | T | K | A | Q | Q | T | N | G | Q | K | A | Q | S | K |
BQ | T | R | E | Q | Q | I | D | G | Q | K | A | E | P | K |
Taian | T | R | E | Q | Q | I | D | D | H | K | A | E | S | R |
HN-2011 | T | R | A | Q | Q | T | D | D | Q | K | A | E | S | R |
GD2013 | T | R | E | Q | Q | I | D | D | H | K | A | E | S | R |
HNLY201301 | T | R | A | Q | Q | T | D | G | Q | K | A | E | S | R |
SDQD20200424-830 | T | R | A | Q | Q | T | D | G | Q | K | A | E | S | R |
JSYZ20170418-30 | T | R | E | Q | Q | T | D | G | Q | K | A | E | P | K |
DJH23 | T | R | E | Q | E | I | D | G | Q | K | S | Q | T | K |
HuN1 | T | R | E | Q | E | I | D | G | Q | K | S | Q | T | K |
China-XY | T | R | E | Q | Q | S | D | D | H | K | A | E | S | R |
27a | T | R | E | Q | E | I | D | G | Q | K | S | Q | T | K |
15425 | A | K | E | E | Q | T | N | G | Q | N | A | E | P | K |
Kresse | T | R | E | Q | Q | I | D | G | Q | K | A | E | P | K |
NADL-2 | T | R | E | Q | Q | I | D | D | H | K | A | E | S | R |
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