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B6db references: 8695645

type Journal Article
authors Battchikova, N.; Himanen, J. P.; Ahjolahti, M.; Korpela, T.
title Phosphoserine aminotransferase from Bacillus circulans subsp. alkalophilus: purification, gene cloning and sequencing
journal Biochim Biophys Acta
Activity 2.6.1.52
Family 2.6.1.52
sel selected
ui 8695645
year (1996)
volume 1295
number 2
pages 187-94
 
keywords Amino Acid Sequence
abstract Two peaks of aspartate aminotransferase (AspAT) catalytic activity were observed during DEAE chromatography of a protein extract from alkalophilic B. circulans. The enzyme purified from the major peak appeared to be not aspartate but phosphoserine aminotransferase (PSAT) with a considerably high AspAT side activity. The sequence of the enzyme N-terminus was determined, and the PSAT gene was cloned as two separate fragments. DNA sequencing revealed the open reading frame for the PSAT starting from TTG, putative ribosomal binding site and terminator of transcription. The PSAT gene encodes a protein of 361 amino acids (M(r) 39793) which shows moderate homology to other known phosphoserine aminotransferases (36-46% of identity, 60-64% of similarity). The PSAT from the alkalophile shares with all of them the consensus sequence pattern around the pyridoxal 5'-phosphate attachment site.
last changed 2009/05/07 13:21

B6db references