The invention belongs to the technical field of goat molecular marker preparation, in particular relating to three goat MC1R defect mutants and their application. The present invention found three defects of goat MC1R receptor mutant, which resulted in two mutation sites of F250V and G255D receptor defects are located in the sixth transmembrane region, another cause of receptor deficient mutation sites of C267W in the third film on the outer ring. These three MC1R mutants are lost to alpha MSH ligand affinity, significantly reduced the inducible and constitutive cAMP levels, and significantly reduced the inducible and constitutive levels of ERK P. Goat MC1R defect mutation leads to the fact that the melanin production signal is blocked and the formation of black coat is affected. The molecular marker of the present invention can be applied to marker assisted selection of goat wool color.
【技术实现步骤摘要】
三种山羊MC1R缺陷突变体及其应用
本专利技术属于山羊分子标记制备
,具体涉及三种山羊MC1R缺陷突变体及其应用。本专利技术的分子标记从编码山羊MC1R缺陷突变体的基因中得到。
技术介绍
毛色是认定畜禽品种的主要条件之一。被毛颜色取决于真黑色素和褐黑色素的比率。真黑色素增加,被毛呈现黑色;褐黑色素增加,被毛呈现黄或红色。两个基因座——Extension与Agouti基因座——调节着毛发或皮肤中的真黑色素和褐黑色素的量1。其中,Extension基因座编码黑皮质素受体1(melanocortin1receptor,MC1R),它是仅存在于黑色素细胞中的黑皮质素受体(melanocortinreceptors,MCRs),是G蛋白偶联受体的家族成员,具有7个跨膜区。对调控色素沉积具有关键作用2。MC1R受体的激活产生真黑色素,MC1R受体功能缺陷则产生褐黑色素。因此它是褐黑色素到真黑色素的开关。一般情况下,MC1R被促黑激素(melanocyte-stimulatinghormone,MSH)激活,产生第二信使cAMP并磷酸化细胞外调节蛋白激酶(extracellularregulatedproteinkinases,ERK)3,cAMP介导黑色素细胞分化和黑色素生成4,磷酸化激活的ERK则促进黑色素细胞的增殖5。Agouti基因座编码Agouti信号蛋白(Agoutisignallingprotein,ASIP),这个旁分泌的信号小分子是MC1R的拮抗剂和抑制剂,能使MC1R受体功能失活。Extension基因座(MC1R)与Agouti基因座(ASI ...
【技术保护点】
一种山羊MC1R缺陷突变体F250V,其特征在于:该突变体的氨基酸序列如下所示:MPALGSPRRLLGSLNCTPPATLPLTLAPNRTGPQCLEVSIPDGLFLSLGLVSLVENVLVVAAIAKNRNLHSPMYYFICCLAMSDLLVSVSNVLETAVMLLLEAGVLATRAAVVQQLDNVIDVLICSSMVSSLCFLGAIAVDRYISIFYALRYHSVVTLPRAWRIIAAIWVASILTSVLSITYYNHTVVLLCLVGFFIAMLALMAVLYVHMLARACQHARGIARLQKRQRPIHQGFGLKGAATLTILLGVX FLCWGPFFLHLSLIVLCPQHPTCGCIFKNFNLFLALIICNAIVDPLIYAFRSQELRKTLQEVLQCSW上述序列的第250位的X是突变氨基酸,其中的苯丙氨酸(F)被缬氨酸(V)替换。
【技术特征摘要】
1.一种山羊MC1R缺陷突变体F250V,其特征在于:该突变体的氨基酸序列如下所示:MPALGSPRRLLGSLNCTPPATLPLTLAPNRTGPQCLEVSIPDGLFLSLGLVSLVENVLVVAAIAKNRNLHSPMYYFICCLAMSDLLVSVSNVLETAVMLLLEAGVLATRAAVVQQLDNVIDVLICSSMVSSLCFLGAIAVDRYISIFYALRYHSVVTLPRAWRIIAAIWVASILTSVLSITYYNHTVVLLCLVGFFIAMLALMAVLYVHMLARACQHARGIARLQKRQRPIHQGFGLKGAATLTILLGVXFLCWGPFFLHLSLIVLCPQHPTCGCIFKNFNLFLALIICNAIVDPLIYAFRSQELRKTLQEVLQCSW上述序列的第250位的X是突变氨基酸,其中的苯丙氨酸(F)被缬氨酸(V)替换。2.一种山羊MC1R缺陷突变体G255D,其特征在于:该突变体的氨基酸序列如下所示:MPALGSPRRLLGSLNCTPPATLPLTLAPNRTGPQCLEVSIPDGLFLSLGLVSLVENVLVVAAIAKNRNLHSPMYYFICCLAMSDLLVSVSNVLETAVMLLLEAGVLATRAAVVQQLDNVIDVLICSSMVSSLCFLGAIAVDRYISIFYALRYHSVVTLPRAWRIIAAIWVASILTSVLSITYYNHTVVLLCLVGFFIAMLALMAVLYVHMLARACQHARGIARLQKRQRPIHQGFGLKGAATLTILLGVFFLCWXPFFLHLSLIVLCPQHPTCGCIFKNFNLFLALIICNAIVDPLIYAFRSQELRKTLQEVLQCSW上述序列的第255位的X是突变氨基酸,其中的甘氨酸(G)被天冬氨酸(D)替换。3.一种山羊MC1R缺陷突变体C267W,其特征在于:该突变体的氨基酸序列如下所示:MPALGSPRRLLGSLNCTPPATLPLTLAPNRTGPQCLEVSIPDGLFLSLGLVSLVENVLVVAAIAKNRNLHSPMYYFICCLAMSDLLVSVSNVLETAVMLLLEAGVLATRAAVVQQLDNVIDVLICSSMVSSLCFLGAIAVDRYISIFYALRYHSVVTLPRAWRIIAAIWVASILTSVLSITYYNHTVVLLCLVGFFIAMLALMAVLYVHMLARACQHARGIARLQKRQRPIHQGFGLKGAATLTILLGVFFLCWGPFFLHLSLIVLXPQHPTCGCIFKNFNLFLALIICNAIVDPLIYAFRSQELRKTLQEVLQCSW上述序列的第267位的X是突变氨基酸,其中的半胱氨酸(C)被色氨酸(W)替换。4.一种山羊MC1R缺陷突变体F250V的分子标记在山羊毛色标记辅助选择中的应用,其特征在于:该分子标记的核苷酸序列如下所示:ATGCCTGCACTCGGCTCCCCGAGGCGGCTGCTGGGTTCCCTTAACTGCACACCCCCAGCCACCCTCCCCCTCACACTGGCCCCCAATCGGACAGGGCCCCAGTGCCTGGAGGTGTCCATCCCTGACGGGCTCTTTCTCAGCCTGGGGCTGGTGAGTCTTGTGGAGAACGTGCTGGTGGTGGCCGCCATCGCCAAGAACCGCAACCTGCACTCCCCCATGTACTACTTCATCTGCTGCCTGGCCATGTCCGACCTGCTGGTGAGCGTCAGCAACGTGCTGGAGACGGCAGTCATGCTGCTGCTGGAGGCTGGTGTCCTGGCCACCCGGGCGGCCGTGGTACAGCAGCTGGACAATGTCATTGACGTGCTCATCTGCAGCTCCATGGTGTCCAGCCTCTGCTTCCTGGGTGCCATCGCTGTGGACCGCTACATCTCCATCTTCTACGCCCTGCGGTACCACAGTGTCGTGACACTGCCCCGCGCGTGGAGGATCATTGCAGCCATCTGGGTGGCCAGCATCCTCACCAGCGTGCTCTCCATCACCTACTACAACCACACGGTCGTCCTGCTGTGCCTCGTTGGCTTCTTCATAGCCATGCTGGCCCTGATGGCCGTCCTCTATGTCCACATGCTGGCCCGGGCCTGCCAGCATGCCCGGGGCATCGCCCGGCTCCAGAAGAGGCAGCGCCCCATTCATCAGGGCTTTGGCCTCAAGGGCGCTGCCACCCTCACCATCCTGCTGGGCGTCRTCTTCCTCTGCTGGGGCCCCTTCTTTCTGCACCTCTCGCTCATCGTCCTCTGCCCCCAGCACCCCACCTGTGGCTGCATCTTCAAGAACTTCAACCTCTTCCTGGCCCTCATCATTTGCAACGCCATTGTGGACCCCCTCATCTATGCCTTCCGCAGCC...
【专利技术属性】
技术研发人员:熊琪,陈明新,李晓锋,索效军,张年,杨前平,陶虎,刘洋,田宏,张鹤山,熊军波,
申请(专利权)人:湖北省农业科学院畜牧兽医研究所,
类型:发明
国别省市:湖北,42
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