Figure 4
Comparing the RS and PQ dimers in BGLPf-M3. Subunits P, Q, R and S are shown in red, green, blue and yellow, respectively. There is a difference between the PQ and RS dimers, even though the monomeric structures of P, Q, R and S are almost identical. (a) When subunit R was superimposed on subunit P, parts of subunit S could not fit onto subunit Q. Arg381 and Tyr382 interact, whereas Arg448 and Glu449 displace each other in the PQ dimer (b). Similarly, Arg448 and Glu449 interacted whereas Arg381 and Tyr382 displaced each other in the RS dimer (c). Putative interactions are shown by black solid lines. |