Superisometries of the AdS x S superspace

We find the superisometry of the near-horizon superspace, forming the super conformal algebra. We present here the explicit form of the transformation of the bosonic and fermionic coordinates (as well as the compensating Loren tz-type transformation) which keeps the geometry invariant. We comment on i ) the BPS condition of the branes in AdS background and ii) significant sim plification of superisometries of the gauge-fixed Green-Schwarz action in A dS(5) x S-5 background.