Mammalian Genome

, 19:570 | Cite as

Identification and characterization of new microRNAs from pig

  • Jung Kim
  • Ik Sang Cho
  • Jae Sang Hong
  • Young Ki Choi
  • Hyunggee Kim
  • Young Sik Lee


MicroRNAs (miRNAs) are small regulatory RNAs that direct the posttranscriptional repression of cognate messenger RNAs. Despite increasing evidence for diverse roles of miRNAs in biological processes, little is known about miRNAs in pig. We describe the first experimental identification of porcine miRNAs by sequence analysis of a cDNA library of small RNAs from porcine fibroblast cells. We identified 25 distinct porcine miRNAs, of which 19 are previously unreported, and define 14 new miRNA families in pig. Most of the cloned miRNAs are expressed ubiquitously in all porcine tissues examined, whereas some miRNAs are expressed preferentially in specific tissues. Our results enrich the porcine miRNA database and provide useful information for investigating biological functions of miRNAs in pig.


miRNA Family Hairpin Structure miRNA Precursor Precursor Sequence Porcine Tissue 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by a grant (20070301034036) from the BioGreen 21 Program, Rural Development Administration, Republic of Korea.

Supplementary material

335_2008_9111_MOESM1_ESM.pdf (131 kb)
(PDF 132 kb)
335_2008_9111_MOESM2_ESM.pdf (21 kb)
(PDF 21 kb)
335_2008_9111_MOESM3_ESM.xls (48 kb)
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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Jung Kim
    • 1
  • Ik Sang Cho
    • 1
  • Jae Sang Hong
    • 1
  • Young Ki Choi
    • 2
  • Hyunggee Kim
    • 1
  • Young Sik Lee
    • 1
  1. 1.Division of Biotechnology, College of Life Sciences and BiotechnologyKorea UniversitySeoulSouth Korea
  2. 2.College of Medicine and Medical Research InstituteChungbuk National UniversityCheongjuSouth Korea

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