CryoEM structure of CD20 in complex with engineered conformationally rigid Rituximab.4DS Fab

Disulfide constrained Fabs overcome target size limitation for high-resolution single-particle cryo-EM.

grid was treated overnight with 4 mM monothiolalkane(C11)PEG6-OH (11-mercaptoundecyl) hexaethyleneglycol then rinsed in ethanol prior to sample application

B-lymphocyte surface antigen B1,Bp35,Leukocyte surface antigen Leu-16,Membrane-spanning 4-domains subfamily A member 1

QVQLQQPGAECVKPGASVKMSCKASGYTFTSYNMHWVKQTPGRGLEWIGAIYPGNGDTSYNQKFKGKATLTADKSSSTAY
MQLSSLTSEDSAVYYCARSTYYGGDWYFNVWGAGTCVTVSAASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFCECPVT
VSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTHHHHHHP

QIVLSQSPAILSASPGEKVTMTCRASSSVSYIHWFQQKCGSSPKPWIYATSNLASGVPVRFSGSGSGTSYSLTISRVECE
DAATYYCQQWTSNPPTFGGGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQE
SVTCQDSKDCTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC

MGSTQSFFMRESKTLGAVQIMNGLFHIALGGLLMIPAGIYAPICVTVWYPLWGGIMYIISGSLLAATEKNSRKCLVKGKM
IMNSLSLFAAISGMILSIMDILNIKISHFLKMESLNFIRAHTPYINIYNCEPANPSEKNSPSTQYCYSIQSLFLGILSVM
LIFAFFQELVIAGIVENEWKRTCSRPKSNIVLLSAEEKKEQTIEIKEEVVGLTETSSQPKNEEDIEIIPIQEEEEEETET
NFPEPPQDQESSPIENDSSPGNSENLYFQGHHHHHHHH

antibody fragment, fab, protein engineering, membrane protein, MEMBRANE PROTEIN-IMMUNE SYSTEM complex

TQSFFMRESKTLGAVQIMNGLFHIALGGLLMIPAGIYAPICVTVWYPLWGGIMYIISGSLLAATEKNSRKCLVKGKMIMN
SLSLFAAISGMILSIMDILNIKISHFLKMESLNFIRAHTPYINIYNCEPANPSEKNSPSTQYCYSIQSLFLGILSVMLIF
AFFQELVIAGIVENEWKRTCSRPKSNIVLLSAEEKKEQTIEIKEEVVGLTETSSQPKNEEDIEIIPIQEEEEEETETNFP
EPPQDQESSPIENDSSP