J. Biol. Chem., Vol. 262, Issue 12, 5499-5509, Apr, 1987
The primary structure of rabbit liver cytosolic serine hydroxymethyltransferase
F Martini, S Angelaccio, S Pascarella, D Barra, F Bossa and V Schirch
The complete amino acid sequence of cytosolic serine
hydroxymethyltransferase from rabbit liver was determined. The sequence was
determined from analysis of peptides isolated from tryptic and cyanogen
bromide cleavages of the enzyme. Special procedures were used to isolate
and sequence the C-terminal and blocked N-terminal peptides. Each of the
four identical subunits of the enzyme consists of 483 residues. The
sequence could be easily aligned with the sequence of Escherichia coli
serine hydroxymethyltransferase. The primary structural homology between
the rabbit and E. coli enzymes is about 42%. The importance of the primary
and predicted secondary structural homology between the two enzymes is
discussed.