Well - PG P6/mmm (possible SG P6522) will have peaks at kappa = 180 omega = 90 phi = 0 30 60 etc..
But if there is only one molecule / asymm unit there cant be an extra 2-fold. How big are the relative domains? Your interesting domain couldnt just be cleaved off could it? Eleanor On 29 April 2015 at 12:59, Peer Mittl <[email protected]> wrote: > We are working with a multi-domain protein crystallized in SG P6_5 with > one molecule per asymmetric unit. The structure was refined at 2.00 A > resolution with reasonable R-factors but unfortunately the domain we are > most interested in seems to be disordered. Interestingly, the self-rotation > function shows peaks on the kappa=180° plane (omega=90°, phi=19° (and every > 30°)), with more than 50% origin peak height. Therefore, we are wondering > if perhaps the space group assignment might be sub-optimal. Any > explanations how these self-rotation peaks could occur and how we could > extract meaningful information to resolve the disordered domain are welcome. > > Best regards, > Peer > > P.S. Some additional information: pointless suggests SG P6_5, the data > doesn't seem to be twinned (L-test), the refined part of the structure has > no "internal symmetry" and refinement in P1 doesn't reveal the "lost" > domain. > > -- > **************************** > Peer Mittl, PD Dr. > Biochemisches Institut > Universität Zürich > Room 44M03 > Winterthurer Strasse 190 > CH-8057 Zürich > > Tel. +41-(0)44-6356559 > Mobile +41-(0)76-2776566 > Fax. +41-(0)44-6356834 > Mail [email protected] >
