• Journal of Plant Biotechnology
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• 제47권3호
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• pp.218-226
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• 2020

유전체 정보가 공공 데이터베이스 내에 빠르게 축적이 되면서 유전체 데이터의 활용도를 높이기 위한 재가공 기술과 공유 기술이 지속적으로 중요해지고 있다. 특히 분자육종을 가속화하기 위해서 다양한 목적에 맞는 분자 마커 개발이 중요하다. 본 연구는 이러한 요구를 해소하기 위해 유전자 단위에서 haplotype을 기본단위로 구분하고 해당 유전자의 haplotype을 대변하는 tag-SNP를 선발하여 분자 마커 등을 개발하는데 사용할 수 있도록 관련 정보를 웹 사이트를 통해서 제공하고자 웹 데이터베이스를 구축하였다. 본 연구를 통해 선발된 각 tag-SNP는 하나의 유전자를 대변할 수 있고, 각 유전자의 haplotype을 구분할 수 있으며, 해당 유전자의 염색체 내 위치 정보, non-synonymous SNP의 정보를 담고 있다. 따라서 기존 무작위 방식으로 선발되어 사용되던 SNP에 비하여 정보력이 높은 tag-SNP를 활용해서 haplotype block을 확장할 수 있을 것이다. Haplotype의 기본 단위를 유전자로 설정함으로써 집단이 바뀜에 따라 발생하는 SNP의 유무, LD block의 크기 등이 변하는 문제점을 극복하고, 표준화된 haplotype library 작성이 가능할 것이며 이는 또한 분자육종을 위한 분자 마커를 선발하는데 활용될 수 있을 것으로 기대된다.

• Asian-Australasian Journal of Animal Sciences
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• 제31권8호
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• pp.1150-1159
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• 2018

Objective: Non-synonymous single nucleotide polymorphisms (nsSNPs) were identified in Berkshire selective sweep regions and then were investigated to discover genetic nsSNP mechanisms that were potentially associated with Berkshire domestication and meat quality. We further used bioinformatics tools to predict damaging amino-acid substitutions in Berkshire-related nsSNPs. Methods: nsSNPs were examined in whole genome resequencing data of 110 pigs, including 14 Berkshire pigs, generated using the Illumina Hiseq2000 platform to identify variations that might affect meat quality in Berkshire pigs. Results: Total 65,550 nsSNPs were identified in the mapped regions; among these, 319 were found in Berkshire selective-sweep regions reported in a previous study. Genes encompassing these nsSNPs were involved in lipid metabolism, intramuscular fatty-acid deposition, and muscle development. The effects of amino acid change by nsSNPs on protein functions were predicted using sorting intolerant from tolerant and polymorphism phenotyping V2 to reveal their potential roles in biological processes that may correlate with the unique Berkshire meat-quality traits. Conclusion: Our nsSNP findings confirmed the history of Berkshire pigs and illustrated the effects of domestication on generic-variation patterns. Our novel findings, which are generally consistent with those of previous studies, facilitated a better understanding of Berkshire domestication. In summary, we extensively investigated the relationship between genomic composition and phenotypic traits by scanning for nsSNPs in large-scale whole-genome sequencing data.

• 한국축산식품학회지
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• 제37권6호
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• pp.926-930
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• 2017

High-quality meat is of great economic importance to the pig industry. The 1-acylglycerol-3-phosphate-O-acyltransferase 5 (AGPAT5) enzyme converts lysophosphatidic acid to phosphatidic acid in the mitochondrial membrane. In this study, we found that the porcine AGPAT5 gene was highly expressed in muscle tissue, influencing meat characteristics, and we also identified a non-synonymous single-nucleotide polymorphism (nsSNP) (rs196952262, c.673 A>G) in the gene, associated with a change of isoleucine 225 to valine. The presence of this nsSNP was significantly associated with meat color (lightness), lower cooking loss, and lower carcass temperatures 1, 4, and 12 h after slaughter (items T1, T4, and T12 on the recognized quality scale, respectively), and tended to increase backfat thickness and the water-holding capacity. These results suggest that nsSNP (c.673A>G) of the AGPAT5 gene is a potential genetic marker of high meat quality in pigs.

• Asian-Australasian Journal of Animal Sciences
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• 제31권2호
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• pp.180-188
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• 2018

Objective: The aim of this study was to investigate the effect of single nucleotide polymorphisms (SNPs) of the melanogenesis associated transcription factor (MITF) and dopachrome tautomerase (DCT) genes on plumage coloration in Asian native duck breeds. MITF encodes a protein for microphthalmia-associated transcription factor, which regulates the development and function of melanocytes for pigmentation of skin, hair, and eyes. Among the tyrosinase-related family genes, DCT is a pigment cell-specific gene that plays important roles in the melanin synthesis pathway and the expression of skin, feather, and retina color. Methods: Five Asian duck varieties (black Korean native, white Korean native, commercial Peking, Nageswari, and Bangladeshi Deshi white ducks) were investigated to examine the polymorphisms associated with plumage colors. Among previously identified SNPs, three synonymous SNPs and one indel of MITF and nine SNPs in exon regions of DCT were genotyped. The allele frequencies for SNPs of the black and white plumage color populations were estimated and Fisher's exact test was conducted to assess the association between the allele frequencies of these two populations. Results: Two synonymous SNPs (c.114T>G and c.147T>C) and a 14-bp indel (GCTGCAAAC AGATG) in intron 7 of MITF were significantly associated with the black- and white-colored breeds (p<0.001). One non-synonymous SNP [c.938A>G (p.His313Arg)] in DCT, was highly significantly associated (p<0.001) and a synonymous SNP (c.753A>G) was significantly associated (p<0.05) with black and white color plumage in the studied duck populations. Conclusion: The results of this study provide a basis for further investigations of the associations between polymorphisms and plumage color phenotypes in Asian duck breeds.

• Asian-Australasian Journal of Animal Sciences
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• 제26권8호
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• pp.1072-1079
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• 2013

The NLRP12 (NLR family, pyrin domain containing 12) serves as a suppressor factor in the inflammatory response and protects the host against inflammation-induced damage. In the present study, we aimed to study the polymorphisms of NLRP12 gene and its association with susceptibility to non-specific digestive disorder (NSDD) in rabbits. We re-sequenced the entire coding region of the rabbit NLRP12 gene and detected a total of 19 SNPs containing 14 synonymous and five non-synonymous variations. Among them, the coding SNP (c.1682A>G), which would carry a potential functional implication, was subsequently subjected to genotyping for case-control association study (272 cases and 267 controls). The results revealed that allele A was significantly protective against NSDD with an odds ratio value of 0.884 (95% confidence interval, 0.788 to 0.993; p = 0.038). We also experimentally induced NSDD in growing rabbits by feeding a fibre-deficient diet and subsequently investigated NLRP12 mRNA expression. The mRNA expression of NLRP12 in healthy status was significantly higher than that in severe NSDD (p = 0.0016). The highest expression was observed in individuals carrying the protective genotype AA (p = 0.0108). These results suggested that NLRP12 was significantly associated with the NSDD in rabbits. However, the precise molecular mechanism of NLRP12 involving in the development of rabbit NSDD requires further research.

• 한국발생생물학회:학술대회논문집
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• 한국발생생물학회 2003년도 제3회 국제심포지움 및 학술대회
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• pp.94-94
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• 2003

Rotavirus는 유아나 어린아이들에게 가장 일반적으로 나타나는 심한 위장염의 원인자이며 설사로 인한 심한 탈수 증세를 일으켜 급속히 성장하는 유아의 균형적인 영양 공급을 방해함으로써 유아들의 발육과 성장 그리고 심하면 생명에 커다란 영향을 미치게 된다. 한편 모유로 키운 유아들은 설사병의 낮은 발병율과 연관이 있었다. 특히 모유의 뮤신 복합체는 rotavirus에 특이적으로 결합하여 항 바이러스활동을 보여주는 것으로 나타났다. 이러한 배경에서 본 연구는 human breast tissue로부터 lactadherin의 cloning 및 sequence 분석을 통하여 유전자의 다양성을 조사하기로 하였다. 한국 여성 9명의 유두 근처 조직에서 lactadherin을 cloning하여 그 sequence를 보고 된 서양여성의 염기서열과 비교 분석결과 여러 곳에서 single nucleotide variation이 발견되었고 본 연구에서 클론한 lactadherin(31bp-1518bp)의 염기서열과 보고된 서양여성 lactadherin gene의 SNP와 비교하였을 때 8개의 SNP중 3부분만이 일치한다는 것을 확인하였다. 또한 같은 조직중 정상 조직과 암 조직 부분에서 각각 lactadherin을 클론하여 염기서열을 비교 분석하였는데 정상 조직에서 2곳의 silent mutation있었고 암조직에서 2곳의 mutation과 1곳의 silent mutation을 발견하였으며 전체 적으로 정상조직과 암 조직 부분에서 lactadherin을 clone하여 염기서열을 분석해본 결과 암조직일수록 유전자의 변이 비율이 높다는 것을 알 수 있었다. 그리고 동일한 염기서열 상에서 많은 변이가 일어났는데 286dp(A->C), 1418dp(G->C)은 mutation이었고 327dp (A->G), 454(C->T)은 silent mutation이었다. 그 외 DNA상에서 여러 부근에 변이가 존재하였는데 이 결과로 보아 coding region에 위치한 cSNP 중 amino acid 변화를 일으켜 protein structure 또는 function에 영향을 줄 수 있는 non-synonymous cSNP 일 것으로 예상되어지며 natural selection의 영향을 받고 있음을 암시하고 있다. 본 연구에서 관찰되어진 각각의 염기 서열의 변이는 한국 사람이 가지는 lactadherin gene의 cSNP의 일부라고 판단하였다.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2005년도 BIOINFO 2005
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• pp.256-259
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• 2005

Among non-synonymous SNPs that cause amino acid change in the protein product, the selection of disease-causing SNPs has been of great interest. We present the comparison between the evolutionary (SIFT score) and structural information (binding pocket) to show that the incorporation between them provides an advantage of sorting disease-causing SNPs from normal SNPs. To set up the procedure, we apply the machine learning method to the test data set from the laboratory experiments.

• 한국식품과학회지
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• 제50권5호
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• pp.480-485
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• 2018

본 연구는 Berkshire 간 조직을 이용하여 RNA-sequencing 분석을 통해 돼지 육질 연관 단일염기다형성을 발굴하기 위해 수행되었다. 그 결과, C9 유전자의 cDNA 942번 G 서열이 T 서열로 변환되어 라이신(lysin)이 아스파라진(asparagin)으로 변하는 non-synonymous SNP를 확인하였다. Berkshire 돼지 405두에서 C9 단일염기다형성의 유전자형을 분석한 결과 major allele는 G, minor allele은 T였다. Berkshire 돼지 405두의 육질 형질을 분석하여 C9 단일염기다형성의 유전자형과 육질 형질과의 연관성 분석한 결과 우성 모델의 경우 육색의 명도, 콜라겐, 수분, 도축 후 24시간 뒤 pH ($pH_{24h}$) 육질 형질에서 유의성이 확인되었고, 열성 모델의 콜라겐 함량, 공우성 모델의 육색의 명도(CIE L), 단백질, 콜라겐 함량에서 유의성을 가졌다. 성별에 따른 C9 유전자형과 육질 형질 간의 연관성을 분석한 결과 거세돈에서 도체중, 콜라겐에서 유의성이 있었으며, 암퇘지의 경우 육색의 명도, 단백질, $pH_{24h}$ 육질 형질에서 유의성이 있었다. 육질 형질 중 $pH_{24h}$ 형질은 육질을 결정하는 중요한 형질로 C9 유전자의 유전자형이 다른 유전자형들에 비해 $pH_{24h}$가 증가되고 육즙 손실이 감소되는 것으로 확인되어 C9 유전자의 TG 유전자를 가진 돼지가 더 좋은 육질을 가지는 것으로 판단된다. 본 결과를 바탕으로 C9 유전자의 단일염기다형성을 육질을 판단하는 생물마커(biomarker)로의 활용이 기대된다.

• BMB Reports
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• 제40권1호
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• pp.95-99
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• 2007

Bovine coding region single nucleotide polymorphisms located proximal to quantitative trait loci were identified to facilitate bovine QTL fine mapping research. A total of 692,763 bovine SNPs was extracted from 39,432 UniGene clusters, and 53,446 candidate SNPs were found to be a depth >3. In order to validate the in silico SNPs experimentally, 186 animals representing 14 breeds and 100 mixed breeds were analyzed. Genotyping of 40 randomly selected candidate SNPs revealed that 43% of these SNPs ranged in frequency from 0.009 to 0.498. To identify non-synonymous SNPs and to correct for possible frameshift errors in the ESTs at the predicted SNP positions, we designed a program that determines coding regions by protein-sequence referencing, and identified 17,735 nsSNPs. The SNPs and bovine quantitative traits loci informations were integrated into a bovine SNP data: BcSNPdb (http://snugenome.snu.ac.kr/BtcSNP/). Currently there are 43 different kinds of quantitative traits available. Thus, these SNPs would serve as valuable resources for exploiting genomic variation that influence economically and agriculturally important traits in cows.

• 농업과학연구
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• 제46권1호
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• pp.27-31
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• 2019

It is well documented that intensive selection in dairy cattle for economic value such as increased milk yield led to a decline in reproductive performance. Recent studies using genome-wide association studies (GWASs) discovered candidate genes involved in the lower fertility including embryo development and conception rates. However, the information, which showed a lower reproductive performance, is limited to dairy cattle, especially Holstein, and the candidate genes were not examined in the Korean native cattle Hanwoo which has been intensively selected and bred for meat in the last few decades. We selected the candidate genes WBP1 and PARM1 reported to be associated with cow and/or heifer conception in dairy cattle and analyzed the genotype because those genes have non-synonymous single nucleotide polymorphisms (SNPs). To determine the single base change, we used the high resolution melting (HRM) assay which is rapid and cost-effective for a small number of genes. We found that most heifers with higher conception (1: service per conception) have the AA genotype coding Threonine rather than Proline in the WBP1 gene. We did not detect an association for a SNP in PARM1 in our analysis. In conclusion, the genetic variation of WBP1 can be used as a selective marker gene to improve reproductive performance, and HRM assay can be used to identify common SNP genotypes rapidly and cost effectively.