China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (3): 876-886.doi: 10.16431/j.cnki.1671-7236.2022.03.009

• Biotechnology • Previous Articles     Next Articles

Cloning, Prokaryotic Expression and Skin Follicles Expression of KAP11.1 Gene in Sheep

GONG Shujuan, SHI Ruijun, WU Tinghui, LI Shuwei   

  1. Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, College of Life Science and Technology, Tarim University, Alar 843300, China
  • Received:2021-09-26 Online:2022-03-05 Published:2022-03-03

Abstract: 【Objective】 The aim of this study was to clone and prokaryotic express the keratin associated protein 11.1(KAP11.1) gene of hair follicles, compare the expression of KAP11.1 gene in skin follicles of different sheep breeds, and explore the expression difference of KAP11.1 gene in local sheep breeds in Southern Xinjiang and its effect on wool quality.【Method】 The skin follicles on the body side of plain-type Hetian sheep, mountain-type Hetian sheep and Karakul sheep were used as the research materials, and the sequence of KAP11.1 gene in sheep (accession No.:HQ595347.1) in GenBank was used as the reference to design primers.PCR amplification of KAP11.1 gene was carried out to construct pMD19-T-KAP11.1 clone plasmid, and pET-28a(+)-KAP11.1 prokaryotic recombinant expression plasmid was constructed after double-enzyme digestion identification.Sequence analysis was carried out after PCR and double-enzyme digestion identification.The recombinant plasmid was transformed into E.coli BL21(DE3).SDS-PAGE and Western blotting were used for detection.The expression of KAP11.1 gene in skin follicles of different sheep was detected by Real-time quantitative PCR.【Result】 The CDS sequence of KAP11.1 gene in 3 sheep breeds was 480 bp, encoding 159 amino acids, which was an unstable hydrophobic protein.The similarity alignment results showed that compared with the reference gene, the two types of Hetian sheep was 99.79%, and mutations occurred at 423 bp, from C to T.The sequence homology of Karakul sheep was 99.38%, from G to T at 69 bp, from C to T at 93 bp, and from C to T at 423 bp.Phylogenetic tree analysis showed that 3 sheep breeds had the closest genetic relationship with Capra hircus, and the farthest genetic relationship with Bos indicus.The secondary structure of KAP11.1 was mainly composed of random coil.The prokaryotic recombinant expression plasmid pET-28a(+)-KAP11.1 was successfully constructed, and KAP11.1 protein (19 ku) was purified.The expression of KAP11.1 gene in skin follicles of mountain-type Hetian sheep and Karakul sheep were significantly higher than that of plain-type Hetian sheep (P<0.05), and there was no significant difference between mountain-type Hetian sheep and Karakul sheep (P>0.05).【Conclusion】 The 480 bp CDS sequence of KAP11.1 gene in sheep was cloned, the prokaryotic recombinant expression plasmid pET-28a(+)-KAP11.1 was successfully constructed, 19 ku KAP11.1 protein was obtained, and KAP11.1 gene was expressed in skin follicles of 3 sheep breeds.

Key words: Hetian sheep; Karakul sheep; KAP11.1 gene; cloning; prokaryotic expression; skin follicles

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