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  • HGVS的变异格式

    符号:

    1.HGVS的变异格式由两部分组成:

    1.1 reference sequence file identifier (accession.version-number) :  actual description of a variant

    比如:NG_012232.1(NM_004006.2):c.357+1G>A

    NG_012232.1(NM_004006.2)是the reference sequence file identifier。

    c.357+1G>A:the actual description of a variant

    1.2 具体解释

    reference sequence file identifiter:只接受NCBI,EBI的公共文件的内容。包括NC_# (e.g. NC_000023.10), LRG_# (e.g. LRG_199), NG_# (e.g. NG_012232.1), ENSG00000182533.6, NM_# (e.g. NM_004006.2), ENST00000343849.2, NR_# (e.g. NR_002196.1) and NP_# (e.g. NP_003997.1)。注意,点号后面的内容是版本号,除了LRG_外,其它的格式都需要版本号。

    actual description of a variant:由两部分组成,一是参考序列的类型,二是具体的突变信息。

    2.具体变异描述的内容(actual description of a variant)

    2.1。参考序列的类型

    2.2。具体的突变信息。

     2.2.1.蛋白

    1.1替代:

       格式:“prefix”“amino_acid”“position”“new_amino_acid”

    LRG_199p1:p.Trp24Cys missense 把一个氨基酸换成另一个氨基酸
    LRG_199p1:p.Trp24Ter (p.Trp24*) nonsense 把一个氨基酸换成终止密码子
    NP_003997.1:p.Cys188= slient 氨基酸没有变化

    1.2缺失:

      格式:“prefix”“amino_acid(s)+position(s)_deleted”“del”

    p.Ala3del 第三个氨基酸Ala缺失
    p.Ala3_Ser5del  第三个氨基酸到第五个氨基酸缺失

    1.3重复:

      格式:“prefix”“amino_acid(s)+position(s)_duplicated”“dup”

    p.Ala3dup (one amino acid)a duplication of amino acid Ala3 in the sequence MetGlyAlaArgSerSerHis to MetGlyAlaAlaArgSerSerHis

    1.4插入:

      格式:“prefix”“amino_acids+positions_flanking”“ins”“inserted_sequence”

    p.His4_Gln5insAla :the insertion of amino acid Ala between amino acids His4 and Gln5 changing MetLysGlyHisGlnGlnCys to MetLysGlyHisAlaGlnGlnCys

    1.5移码(frame shift):移码是插入或缺失的一种特例。

     格式: “prefix”“amino_acid”position”new_amino_acid”“fs”“Ter”“position_termination_site

    p.Arg97ProfsTer23 :a variant with Arg97 as the first amino acid changed, shifting the reading frame, replacing it for a Pro and terminating at position Ter23

     解释:第97位的Arg变为Pro,这次翻译终止为从该位点数起的第23个氨基酸。

     2.2.2基因

    在用coding DNA作为参考序列时,其有自己的坐标定义图:

     2.1 替代 :

        格式: “prefix”“position_substituted”“reference_nucleotide””>”new_nucleotide”

      • NC_000023.10:g.33038255C>A
        a substitution of the C nucleotide at g.33038255 for an A
      • NG_012232.1(NM_004006.1):c.93+1G>T
        a substitution of the G nucleotide at c.93+1 (coding DNA reference sequence) with a T

    2.2缺失

       格式:“prefix”“position(s)_deleted”“del”

    NG_012232.1:g.19_21del (several nucleotides)

    a deletion of nucleotides g.19 to g.21 in the sequence AGAATCACA to AGAA___CA

    2.3重复

      格式:“prefix”“position(s)_duplicated”“dup”

    NM_004006.2:c.20_23dup (NC_000023.10:g.33229407_33229410dup)

    a duplication from position c.20 to c.23 in the sequence AGAAGTAGAGG to AGAAGTAGATAGAGG

    2.4插入:

       格式:“prefix”“positions_flanking”“ins”“inserted_sequence”

    NC_000023.10:g.32862923_32862924insCCT (LRG_199t1:c.240_241insAGG)

    the insertion of nucleotides CCT between nucleotides g.32862923 and g.32862924

    2.5转换:一段序列被参考基因组的另一段序列替换

      格式:“prefix”“positions_converted”“con”“positions_replacing_sequence”

    NC_000022.10:g.42522624_42522669con42536337_42536382

    conversion in exon 9 of the CYP2D6 gene replacing exon 9 nucleotides g.42522624 to g.42522669 with those of the 3’ flanking CYP2D7P1 gene, nucleotides g.42536337 to g.42536382 from the same genomic reference sequence (NC_000022.10)

    2.6缺失插入

      格式:“prefix”“position(s)_deleted”“delins”“inserted_sequence”

    g.6775delinsGA

    a deletion of nucleotide g.6775 (a T, not described), replaced by nucleotides GA, changing ..AGGCTCATT.. to ..AGGCGACATT..

     参考文章:

    http://varnomen.hgvs.org/recommendations/general/

    http://www.sohu.com/a/158915410_603295

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  • 原文地址:https://www.cnblogs.com/timeisbiggestboss/p/7988377.html
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