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Journal of Zhejiang University (Agriculture and Life Sciences)  2019, Vol. 45 Issue (1): 109-118    DOI: 10.3785/j.issn.1008-9209.2018.02.052
Animal sciences & veterinary medicine     
Single nucleotide polymorphism screening and bioinformatics analysis of the main family genes of FABPs in Bamei pig
Li ZHANG(),Weilun NONG,Jianxiong LU,Guohua ZHANG,Lixia LIU()
1. College of Life Science and Engineering, Northwest Minzu University, Lanzhou 730124, China
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Abstract  

Fatty acid-binding proteins belong to the intracellular lipid binding protein superfamily. All members of the FABPs family have the most basic functions to manage free fatty acid absorption and intracellular transport. In order to explore the regulation mechanism of the FABPs main family genes on the lipid deposition and metabolism in Bamei pigs, in this study, DNA pooling was constructed with Bamei pigs as test objects, and the single nucleotide polymorphisms (SNPs) of FABP1 , FABP2 , FABP3 and FABP4 genes in Bamei pigs were screened by segmented amplification and direct sequencing, and the bioinformatics analysis was carried out. The result showed that 15 SNPs were detected in the FABPs main family genes, in which there were three samesense and two missense mutation (C2 033A-Exon2-FABP1 , G3 751A-Exon3-FABP1 ). Bioinformatics analysis showed that the secondary structure of mRNA and free energy change before and after nucleotide mutation led to the change of its structural stability; there were differences in the estimation of allele frequency, mRNA secondary structure prediction, and protein secondary and tertiary structure prediction before and after the mutation. The above results indicate that the FABPs main family genes have high mutagenicity, which provides a molecular basis for the genetic effect study of intramuscular fat content in Bamei pigs.



Key wordsBamei pig      fatty acid-binding protein gene      single nucleotide polymorphisms      bioinformatics     
Received: 05 February 2018      Published: 28 March 2019
CLC:  S 831  
Corresponding Authors: Lixia LIU     E-mail: zhangli2008@aliyun.com;skllx@xbmu.edu.cn
Cite this article:

Li ZHANG,Weilun NONG,Jianxiong LU,Guohua ZHANG,Lixia LIU. Single nucleotide polymorphism screening and bioinformatics analysis of the main family genes of FABPs in Bamei pig. Journal of Zhejiang University (Agriculture and Life Sciences), 2019, 45(1): 109-118.

URL:

http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2018.02.052     OR     http://www.zjujournals.com/agr/Y2019/V45/I1/109


八眉猪FABPs主要家族基因单核苷酸多态性筛查及生物信息学分析

脂肪酸结合蛋白(fatty acid-binding protein, FABPs)属细胞内脂质结合蛋白超家族,FABPs家族所有成员都具有管理游离脂肪酸吸收和细胞内转运的最基本功能。为了探究FABPs主要家族基因在八眉猪体内脂肪沉积代谢过程中的调控机制,本研究以八眉猪为试验对象构建DNA混合池,采用分段扩增和直接测序法对八眉猪FABP1 FABP2 FABP3 FABP4 基因进行单核苷酸多态性(single nucleotide polymorphisms, SNPs)快速筛查和生物信息学分析。结果表明,在八眉猪FABPs主要家族基因中共检测出15个SNPs,其中编码区有3个同义突变和2个错义突变(C2 033A-Exon2-FABP1 、G3 751A-Exon3-FABP1 )。对其进行生物信息学分析表明:核苷酸突变前后mRNA二级结构和自由能的改变导致其结构稳定性发生改变;突变前后的等位基因频率估算,mRNA二级结构预测,蛋白质二、三级结构预测分析均有差异。说明八眉猪FABPs主要家族基因具有较高的突变性,为研究八眉猪肌内脂肪含量的遗传效应提供了分子理论依据。


关键词: 八眉猪,  脂肪酸结合蛋白基因,  单核苷酸多态性,  生物信息学 

引物名称

Primer name

引物序列(5′→3′)

Primer sequences (5′→3′)

退火温度

Annealing temperature/℃

目的片段长度

Target fragment length/bp

FABP1 -Exon1 F:GCACTTGATTGACACCCAT 62.0 448
R:GTCCAGGGAGGAATAGCAT
FABP1 -Exon2 F:CCACTGACCTTCCCTTTC 61.0 555
R:TCCCTAAGACCTTCCTCC
FABP1 -Exon3 F:CTATTCAGAGCCAGAGCACA 58.0 535
R:GCAATGATGAGGGAGTAGTG
FABP1 -Exon4 F:ACTCCCTCATCATTGCCACAG 59.0 544
R:ACGAGAATCACCCTTCAGACC
FABP2 -Exon1 F:ATCATCCTTCAATGCAGCT 56.0 391
R:CACAACAGGCACTATTCCC
FABP2 -Exon2 F:CACAACAGGCACTATTCCC 55.5 313
R:CTCCATTGGCTGCTTCAGTA
FABP2 -Exon3 F:CTCCATTGGCTGCTTCAGTA 57.5 482
R:AATCAGAAGGCATCAGAAAG
FABP2 -Exon4 F:ACACTTTCTGATGCCTTCTG 59.0 590
R:AAATGCTGCAAATTATTCGA
FABP3 -Exon1

F:TCTCCTCTAGTCTCTCATCTCTG

R:GTCGTCCTCACCAATTGACTTC

61.5 521
FABP3 -Exon2 F:AGCCTTTGAAAATTCTTGCCCT 55.5 544
R:GACACGGAGGTCAGAATATCCT
FABP3 -Exon3 F:AGCTGGGCTGTCTGACTC 60.0 474
R:CCTCCACCCTCCACTATC
FABP3 -Exon4 F:TGAAGACCTGGTGTAAGCA 60.0 386
R:ACAACAAGAACCGGAACTG
FABP4 -Exon1 F:GGAGAACCAAAGTTGAGAAA 57.0 382
R:CAGAGTGAAAAACAGCCATA
FABP4 -Exon2 F:ACACACATACACGCATTCC 58.5 556
R:TTTTTTTCCCTCTTTTCCC
FABP4 -Exon3 F:GTATGCTGTTGCTTTTGGT 60.5 469
R:ATTGGAAGAGGTTAGGTGG
FABP4 -Exon4 F:CTTCCCACCATTGGAGAA 55.5 623
R:CCTAACACGGGCAACTTC
Table 1 Informations for primers of FABPs genes in Bamei pig
Fig. 1 Results of sequencing of the main family genes for FABPs and BLAST analysis in Bamei pig

基因类型

Gene type

突变位点

Mutation site

突变类型

Mutation type

氨基酸变化

Amino acid variation

等位基因频率Allele frequency

突变前频率

Before mutation

突变后频率

After mutation

FABP1 A57G-Exon1-FABP1 0.147 5 0.852 5
T2 006C-Exon2-FABP1 同义突变 0.214 3 0.785 7
A2 011C-Exon2-FABP1 同义突变 0.260 3 0.739 7
C2 033A-Exon2-FABP1 错义突变 L74M 0.205 5 0.794 5
G3 751A-Exon3-FABP1 错义突变 G87S 0.567 6 0.432 4
T3 943A-Intron3-FABP1 0.615 4 0.384 6
T4 303C-Intron3-FABP1 0.738 5 0.261 5
FABP2 A-207T-5′UTR-FABP2 0.827 6 0.172 4
FABP3 G-332A-5′UTR-FABP3 0.382 4 0.617 6
C807T-Intron1-FABP3 0.687 5 0.312 5
C3 073T-Exon3-FABP3 同义突变 0.779 2 0.220 8
FABP4 G109C-Intron1-FABP4 0.780 5 0.219 5
A4 474G-3′UTR-FABP4 0.894 1 0.105 9
T4 487A-3′UTR-FABP4 0.173 9 0.826 1
C4 536T-3′UTR-FABP4 0.837 8 0.162 2
Table 2 SNPs locus mutation types and estimation of allele frequency of FABPs gene in Bamei pig
Fig. 2 Results of secondary structure change of mRNA
突变位点 突变类型

α-螺旋

Alpha helix/%

β-转角

Beta turn/%

无规则卷曲

Random coil/%

扩展链

Extended strand/%

C2 033A-Exon2-FABP1

突变前

Before mutation

21.26(27) 15.75(20) 24.41(31) 38.58(49)

突变后

After mutation

20.47(26) 15.75(20) 25.20(32) 38.58(49)
G3 751A-Exon3-FABP1

突变前

Before mutation

20.47(26) 15.75(20) 25.20(32) 38.58(49)

突变后

After mutation

20.47(26) 15.75(20) 25.20(32) 38.58(49)
Table 3 Analysis of prediction of secondary protein structure with different mutations
Fig. 3 Results of tertiary structure change of protein
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