Molecular cloning and functional expression of bovine brain GABA transaminase

Seong Gyu Jeon, Jae Hoon Bahn, Joong Sik Jang, Sang Ho Jang, Byung Ryong Lee, Kil Soo Lee, Jinseu Park, Tae Cheon Kang, Moo Ho Won, Hyong Bai Kim, Oh Shin Kwon, Sung Woo Cho, Soo Young Choi

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We isolated a cDNA that encodes the bovine brain γ-aminobutyrate transaminase (GABA-T; EC 2.6.1.19) from the λgt 11 cDNA library, which showed a high degree of sequence similarity to the corresponding enzymes from various sources. Northern blot analysis revealed two differentially expressed GABA-T transcripts of approximately 2.0 and 6.0 kb in the bovine tissues. Southern blot analysis indicates that the two GABA-T transcripts are encoded in a greater-than 10-kb, single-copy gene. Bovine GABA-T cDNA was expressed in E. coli using the pGEX bacterial-expression vector system. The overexpressed GABA-T was enzymatically active after purification, and it had very similar kinetic parameters when compared with those of other mammalian GABA-Ts.

Original languageEnglish
Pages (from-to)91-96
Number of pages6
JournalMolecules and Cells
Volume12
Issue number1
StatePublished - 31 Aug 2001

Keywords

  • cDNA Library
  • GABA-T
  • Northern Blot
  • Southern Hybridization

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