  Starting from noncommutative Fermi theory in two-dimensions, we construct a
deformed Kac-Moody algebra between its vector and Chiral currents . The
higher-order corrections to the deformed Kac-Moody algebra are explicitly
calculated. We observe that the ordinary Schwinger terms are not affected by
noncommutativity. Finally we conclude that the deformed Kac-Moody algebra can
be given in term of ordinary Kac-Moody algebra plus infinitely many Lie
algebraic structures at each non-zero power of the antisymmetric coefficient
$\theta$.
