ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (6): 885-892.doi: 10.11843/j.issn.0366-6964.2014.06.005

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Cloning and Expression of TGF-β1 Gene from Alpaca (Lama pacos)

JIA Xiao-yun1,JIN Lei-hao1,DING Na1,LUO Dong-ping2,FAN Rui-wen3,DONG Chang-sheng3*   

  1. (1.College of Life Science,Shanxi Agricultural University,Taigu 030801, China;2.The First Hospital of Shanxi Medical University,Taiyuan 030001, China;3.College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801, China)
  • Received:2013-12-27 Online:2014-06-23 Published:2014-06-23

Abstract:

In order to explore the biological functions of TGF-β1 in coat color formation in alpaca,the experiment was conducted to clone alpaca TGF-β1 gene,investigate the expression of TGF-β1 in different tissues/organs,and examine the relationship between the TGF-β1 expression and alpaca coat color.The TGF-β1 cDNA was cloned from alpaca by 3′ and 5′ RACE.The sequence analysis was performed by DNAman,PROSITE and megAlign.The expression levels of TGF-β1 gene in different organs/tissues were analyzed by qRT-PCR.The full length of TGF-β1 cDNA in alpaca was 1 364 bp (GenBank Accession No.KF887499) with 1 173 bp ORF coding 390 amino acids.Sequence analysis showed alpaca TGF-β1 has typical structures of TGF-β1 family,showing high similarity with responsed proteins from other mammals.Phylogenetic analysis showed that alpaca TGF-β1 gene is much closed to wild boar(Sus scrofa).qRT-PCR showed that the relative gene expression level of TGF-β1 in brown alpaca was 3.5 times than that in white alpaca.TGF-β1 gene was expressed widely in tested tissues in goat while the expression levels were different in those tissues and highest in lymphoid tissue.Cloning and sequence characterization of alpaca TGF-β1 gene plus the expression analysis in different tisssues/organs indicate that TGF-β1 may play important role in alpaca coat color formation,provide the related DNA elements and experimental basic for further investigating on the molecular mechanism of TGF-β1 functions in animal coat color formation and regulation.

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