Polypeptide sequence alignments of regions of LeuRS that contain
splicing-sensitive elements. (A) CP1 region. The
conserved boxed G is the location of the G288S splicing suppressor (3,
6). The conserved boxed W is the location of the W286C substitution
that abolishes splicing activity (11). (B) C-terminal
region. The two eukaryotic cytoplasmic enzymes contain a C-terminal
extension of approximately 75 residues that is not shown.
Abbreviations: Mt-1, M. tuberculosis (reported herein);
Mt-2, GenBank accession no. 2501027; Ml, M. leprae; Bs,
B. subtilis; Ec, E. coli; Scm, S.
cerevisiae mitochondrial; Ncm, N. crassa
mitochondrial; Hsm, Homo sapiens mitochondrial; Scc,
S. cerevisiae-cytoplasmic; Ncc, N. crassa
cytoplasmic.