Molecular Analyses ofan Acidic Transthyretin Asn90Variant

Molecular Analyses ofan Acidic Transthyretin Asn90Variant
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酸性运甲状腺素蛋白 Asn90 变体的分子分析

DOI:
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发表时间:
1991
期刊:
影响因子:
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通讯作者:
A. Banhzoff
A. Banhzoff
中科院分区:
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文献类型:
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作者:
M. Saraiva;M. Almeida;TIsabel LongoAlves;A. Moreira;M. Gawinowicz;P. Costa;S. Rauh;A. Banhzoff

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在葡萄牙和德国人群中发现了甲状腺素运载蛋白(TTRAsn 90)突变。通过使用双向一维(D1-D)电泳结合等电聚焦(IEF)或固定化pH梯度混合等电聚焦(HIEF)作为最终分离步骤,在2/4,000名德国受试者和4/1200名葡萄牙受试者中筛选分析发现了这种变异性较低的pI。葡萄牙人群样本来自TTRMet 30相关家族性淀粉样多发性神经病(FAP)流行的地区,将其分为(a)500只FAP激酶组和(B)700只随机组。重债穷国基金显示了两种特殊情况:(1)一例FAP家系同时携带Met 30置换和酸性变异体;(2)一例葡萄牙人随机抽样,仅携带酸性单体。通过HPLC对酸性变异携带者和正常TTR进行肽图谱比较,结果显示存在异常胰蛋白酶肽,而不是存在正常TTR肽,90位天冬酰胺替换为组氨酸,这是由组氨酸密码子中腺嘌呤替换为胞嘧啶的单个碱基改变解释的。在DNA水平上,用SphI和BsmI消化PCR扩增的材料,通过RFLP分析证实了这一点。在所有Asn 90替换的携带者中,没有发现与FAP特征性状相关的指标。
Summary A mutation intransthyretin (TTRAsn90)hasbeenidentified inthePortuguese andGermanpopulations. Thisvariant hasa lower pIandwas found byscreening analyses in2/4,000 Germansubjects andin4/ 1,200 Portuguese byusing either double one-dimensional (D1-D) electrophoresis withisoelectric focusing (IEF) orhybrid isoelectric focusing inimmobilized pHgradients (HIEF) asthefinal separation step.The Portuguese population sample was fromthe areawhere TTRMet30-associated familial amyloidotic polyneuropathy (FAP) prevails, andit was divided into (a) a group of500individuals belonging toFAPkindreds and(b) a groupof700collected atrandom. HIEFshowed twoparticular situations: (1) one case,froman FAPkindred, was simultaneously carrier oftheMet30substitution andtheacidic variant, and(2) one individual, fromtherandomly selected Portuguese sample, hadonly theacidic monomer. Comparative peptide mapping, byHPLC,oftheacidic variant carriers andofnormal TTRshowed the presenceofan abnormal tryptic peptide, notpresentinthenormal TTRdigests, with anasparagine-for-histidine substitution atposition 90explained bya single basechange ofadenine forcytosine inthehistidine codon. This was confirmed attheDNA level byRFLPanalyses ofPCR-amplified material after digestion withSphIandBsmI.Inall carriers oftheAsn90substitution, no indicators werefound for an association withtraits characteristic forFAP.
导致家族性淀粉样多发性神经病的新突变。
DOI: 10.1016/0006-291x(89)91802-0
发表时间: 1989
影响因子: 3.1
作者:
Skare,JC;Saraiva,MJ;Alves,IL;Skare,IB;Milunsky,A;Cohen,AS;Skinner,M
通讯作者: Skinner,M