α1-B-糖蛋白

位於19號人類染色體的基因

α1-B-糖蛋白(英語:Alpha-1-B glycoprotein)是一種功能未知的血漿糖蛋白,分子量為54.3 kDa,由A1BG 基因編碼[1],和免疫球蛋白超家族成員的可變區序列有着一定相似性。胰管腺癌患者的胰液中會出現A1BG過表達[2]

Alpha-1-B glycoprotein
標識
代號 A1BG; A1B; ABG; GAB; HYST2477
擴展標識 遺傳學138670 同源基因11167 GeneCards: A1BG Gene
直系同源體
物種 人類 小鼠
Entrez 1 117586
Ensembl ENSG00000121410 ENSMUSG00000022347
UniProt P04217 Q19LI2
mRNA序列 NM_130786 NM_001081067
蛋白序列 NP_570602 NP_001074536
基因位置 Chr 19:
58.86 – 58.86 Mb
Chr 15:
60.92 – 60.92 Mb
PubMed查詢 [1] [2]

同源體

編輯

直系同源

編輯

如下表所示,α-1-B糖蛋白在如下動物中都是保守的,很可能在所有哺乳動物中都具有一定的保守性[3]

拉丁文學名 通用名 與人類分化的時間(百萬年前)[4] NCBI蛋白質編碼 與人類的序列相似性 蛋白序列長度 基因名
Homo sapiens[5] 人類 -- NP_570602 100% 495 A1BG
Pan troglodytes[6] 黑猩猩 6.2 XP_001146669 97.0% 501 PREDICTED: Alpha-1B-glycoprotein isoform 4
Pan Paniscus[7] 倭黑猩猩 6.3 XP_003816677 97.0% 499 A1BG
Gorilla gorilla gorilla [8] 大猩猩 8.8 XP_004061652 95.0% 275 PREDICTED: alpha-1B-glycoprotein
Pongo Abelii[9] 蘇門達臘猩猩 15.7 XP_002829953 95.0% 495 alpha-1B-glycoprotein isoform 1
Macaca mulatta[10] 普通獼猴 29.0 XM_001101821 88.0% 351 hypothetical protein EGK_11172, partial
Callithrix jacchus[11] 普通狨 42.6 XP_002762619 83.0% 500 A1BG
Mus musculus [12] 小家鼠 91.0 NP_001074536 44.0% 512 alpha-1B-glycoprotein precursor
Felis catus[13] 94.2 XP_003997399 62.0% 481 PREDICTED: alpha-1B-glycoprotein
Equus caballus[14] 97.4 XP_001495344 58.0% 568 PREDICTED: alpha-1B-glycoprotein-like
Loxodonta africana [15] 非洲象 104.7 XP_003406722 61.0% 520 PREDICTED: alpha-1B-glycoprotein-like

旁系同源

編輯

目前並未發現α-1-B糖蛋白的旁系同源體[16]

同源結構域

編輯

An initial NCBI Blast alignment of alpha-1B glycoprotein illustrates that the protein is mainly composed of three immunoglobulin domains.[17]There is a large segment of amino acids from position 297 to 400 that is not shown to be an immunoglobulin domain. However, a NCBI BLAST alignment of just the amino acids from 297-400 does illustrate that the latter sequence is indeed a fourth immunoglobulin domain.[18]Ultimately, alpha-1B glycoprotein seems to be primarily composed of four immunoglobulin domains.

參考文獻

編輯
  1. ^ "Entrez Gene: Alpha-1-B glycoprotein".
  2. ^ Tian M, Cui YZ, Song GH, Zong MJ, Zhou XY, Chen Y, Han JX (2008).
  3. ^ "NCBI Blast results for A1BG protein sequence"頁面存檔備份,存於互聯網檔案館.
  4. ^ "Time Tree"頁面存檔備份,存於互聯網檔案館). 
  5. ^ "alpha-1-B glycoprotein [Homo sapiens]"頁面存檔備份,存於互聯網檔案館.
  6. ^ "PREDICTED: alpha-1B-glycoprotein isoform 4 [Pan troglodytes]"頁面存檔備份,存於互聯網檔案館).
  7. ^ "PREDICTED: alpha-1B-glycoprotein [Pan paniscus]"頁面存檔備份,存於互聯網檔案館.
  8. ^ "PREDICTED: alpha-1B-glycoprotein"頁面存檔備份,存於互聯網檔案館.
  9. ^ "Send to: PREDICTED: alpha-1B-glycoprotein isoform 1 [Pongo abelii]"頁面存檔備份,存於互聯網檔案館.
  10. ^ "hypothetical protein EGK_11172, partial [Macaca mulatta]"頁面存檔備份,存於互聯網檔案館.
  11. ^ "PREDICTED: alpha-1B-glycoprotein [Callithrix jacchus]"頁面存檔備份,存於互聯網檔案館.
  12. ^ "alpha-1B-glycoprotein precursor [Mus musculus]"頁面存檔備份,存於互聯網檔案館.
  13. ^ "PREDICTED: alpha-1B-glycoprotein [Felis catus]"頁面存檔備份,存於互聯網檔案館.
  14. ^ "PREDICTED: alpha-1B-glycoprotein-like"頁面存檔備份,存於互聯網檔案館.
  15. ^ "PREDICTED: alpha-1B-glycoprotein-like [Loxodonta africana]"頁面存檔備份,存於互聯網檔案館). 
  16. ^ "A1BG Gene"頁面存檔備份,存於互聯網檔案館).
  17. ^ "NCBI conserved domain search"頁面存檔備份,存於互聯網檔案館.
  18. ^ "NCBI Blast: Protein Sequence"頁面存檔備份,存於互聯網檔案館.