Abstract
A transaminase from Vibrio fluvialis JS17 showing activity toward chiral amines was purified to homogeneity and its enzymatic properties were characterized. The transaminase showed an apparent molecular mass of 100 kDa as determined by gel filtration chromatography and a subunit mass of 50 kDa by MALDI-TOF mass spectrometry, suggesting a dimeric structure. The enzyme had an isoelectric point of 5.4 and its absorption spectrum exhibited maxima at 320 and 405 nm. The optimal pH and temperature for enzyme activity were 9.2 and 37°C, respectively. Pyruvate and pyridoxal 5′-phosphate increased enzyme stability whereas (S)-α-methylbenzylamine reversibly inactivated the enzyme. The transaminase gene was cloned from a V. fluvialis JS17 genomic library. The deduced amino acid sequence (453 residues) showed significant homology with (ω-amino acid:pyruvate transaminases (ω-APT) from various bacterial strains (80 identical residues with four ω-APTs). However, of 159 conserved residues in the four ω-APTs, 79 were not conserved in the transaminase from V. fluvialis JS17. Taken together with the sequence homology results, and the lack of activity toward β-alanine (a typical amino donor for the ω-APT), the results suggest that the transaminase is a novel amine:pyruvate transaminase that has not been reported to date.
| Original language | English |
|---|---|
| Pages (from-to) | 463-471 |
| Number of pages | 9 |
| Journal | Applied Microbiology and Biotechnology |
| Volume | 61 |
| Issue number | 5-6 |
| DOIs | |
| Publication status | Published - 2003 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Biotechnology
- Applied Microbiology and Biotechnology
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Purification, characterization, and molecular cloning of a novel amine:pyruvate transaminase from Vibrio fluvialis JS17. / shin, jong shik; Yun, H.; Jang, J. W.; Park, I.; Kim, B. G.
In: Applied Microbiology and Biotechnology, Vol. 61, No. 5-6, 01.01.2003, p. 463-471.Research output: Contribution to journal › Article
TY - JOUR
T1 - Purification, characterization, and molecular cloning of a novel amine:pyruvate transaminase from Vibrio fluvialis JS17
AU - shin, jong shik
AU - Yun, H.
AU - Jang, J. W.
AU - Park, I.
AU - Kim, B. G.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - A transaminase from Vibrio fluvialis JS17 showing activity toward chiral amines was purified to homogeneity and its enzymatic properties were characterized. The transaminase showed an apparent molecular mass of 100 kDa as determined by gel filtration chromatography and a subunit mass of 50 kDa by MALDI-TOF mass spectrometry, suggesting a dimeric structure. The enzyme had an isoelectric point of 5.4 and its absorption spectrum exhibited maxima at 320 and 405 nm. The optimal pH and temperature for enzyme activity were 9.2 and 37°C, respectively. Pyruvate and pyridoxal 5′-phosphate increased enzyme stability whereas (S)-α-methylbenzylamine reversibly inactivated the enzyme. The transaminase gene was cloned from a V. fluvialis JS17 genomic library. The deduced amino acid sequence (453 residues) showed significant homology with (ω-amino acid:pyruvate transaminases (ω-APT) from various bacterial strains (80 identical residues with four ω-APTs). However, of 159 conserved residues in the four ω-APTs, 79 were not conserved in the transaminase from V. fluvialis JS17. Taken together with the sequence homology results, and the lack of activity toward β-alanine (a typical amino donor for the ω-APT), the results suggest that the transaminase is a novel amine:pyruvate transaminase that has not been reported to date.
AB - A transaminase from Vibrio fluvialis JS17 showing activity toward chiral amines was purified to homogeneity and its enzymatic properties were characterized. The transaminase showed an apparent molecular mass of 100 kDa as determined by gel filtration chromatography and a subunit mass of 50 kDa by MALDI-TOF mass spectrometry, suggesting a dimeric structure. The enzyme had an isoelectric point of 5.4 and its absorption spectrum exhibited maxima at 320 and 405 nm. The optimal pH and temperature for enzyme activity were 9.2 and 37°C, respectively. Pyruvate and pyridoxal 5′-phosphate increased enzyme stability whereas (S)-α-methylbenzylamine reversibly inactivated the enzyme. The transaminase gene was cloned from a V. fluvialis JS17 genomic library. The deduced amino acid sequence (453 residues) showed significant homology with (ω-amino acid:pyruvate transaminases (ω-APT) from various bacterial strains (80 identical residues with four ω-APTs). However, of 159 conserved residues in the four ω-APTs, 79 were not conserved in the transaminase from V. fluvialis JS17. Taken together with the sequence homology results, and the lack of activity toward β-alanine (a typical amino donor for the ω-APT), the results suggest that the transaminase is a novel amine:pyruvate transaminase that has not been reported to date.
UR - http://www.scopus.com/inward/record.url?scp=0038236890&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038236890&partnerID=8YFLogxK
U2 - 10.1007/s00253-003-1250-6
DO - 10.1007/s00253-003-1250-6
M3 - Article
C2 - 12687298
AN - SCOPUS:0038236890
VL - 61
SP - 463
EP - 471
JO - Applied Microbiology and Biotechnology
JF - Applied Microbiology and Biotechnology
SN - 0175-7598
IS - 5-6
ER -