-
Pyrrolysine (symbol Pyl or O;
encoded by the 'amber' stop
codon UAG) is an α-amino acid that is used in the
biosynthesis of
proteins in some methanogenic...
- in the
standard genetic code and an
additional 2 (selenocysteine and
pyrrolysine) that can be
incorporated by
special translation mechanisms. In contrast...
-
similar cysteine, and parti****tes in
several unique enzymatic reactions.
Pyrrolysine (Pyl, O) is
another amino acid not
encoded in DNA, but
synthesized into...
-
glutamic acid, serine, and
selenocysteine (considered the 21st
amino acid).
Pyrrolysine (considered the 22nd
amino acid),
which is
proteinogenic only in certain...
- code for
pyrrolysine.
Selenocysteine came to be seen as the 21st
amino acid, and
pyrrolysine as the 22nd. Both
selenocysteine and
pyrrolysine may be present...
-
Pyrrolysine—tRNAPyl
ligase (EC 6.1.1.26, PylS, pyrrolysyl-tRNA synthetase) is an
enzyme with
systematic name L-
pyrrolysine:tRNAPyl
ligase (AMP-forming)...
-
organisms the
genetic code can
include selenocysteine and—in
certain archaea—
pyrrolysine.
Shortly after or even
during synthesis, the
residues in a
protein are...
-
animal digestive tracts.
Methanosarcina grow in colonies. The
amino acid
pyrrolysine was
first discovered in a
Methanosarcina species, M. barkeri. Primitive...
- Leu L
Lysine Lys K
Methionine Met M
Phenylalanine Phe F
Proline Pro P
Pyrrolysine Pyl O
Selenocysteine Sec U
Serine Ser S
Threonine Thr T
Tryptophan Trp...
- However,
there are two
extra proteinogenic amino acids:
selenocysteine and
pyrrolysine.
These non-standard
amino acids do not have a
dedicated codon, but are...
