2026-05-09_00000011|hard|11HW

SARS-CoV-2 spike S2 trimer stabilized in the early fusion intermediate conformation (E-FICs-v3) bound to C77G12 (Fab local refinement); Electron microscopy 2.80Å
Protein #1 605 residues (30% resolved)

MTRLTVLALLAGLLASSRASMSDSEVNQEAKPEVKPEVKPETHINLKVSDGSSEIFFKIKKTTPLRRLMEAFAKRQGKEMDSLRFLYDGIRIQADQTPEDLDMEDNDIIEAHRENDDDDKTGTGSQSNAESVQNHTFEVLNNTIRALELILRKLEILYEMILQLHEEVEAIQKAINVLYENQKLIANQFNSAIGKIQDSLSSTASALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLAKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITTDNTFVSGNCDVVIGTNSVAYSNNSIAIPTNFTISVTTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNFSQILPDPSKPSKRSFIEDLLFNKVTLADAGFTIDKEKWKEWRKEMENLTKEIKETLEEARKTLKQAEETFKTPSSGGTDDDDKTGSLNDIFEAQKIEWHEQGSHHHHHHHH

MTRLTVLALLAGLLASSRASMSDSEVNQEAKPEVKPEVKPETHINLKVSDGSSEIFFKIKKTTPLRRLMEAFAKRQGKEMDSLRFLYDGIRIQADQTPEDLDMEDNDIIEAHRENDDDDKTGTGSQSNAESVQNHTFEVLNNTIRALELILRKLEILYEMILQLHEEVEAIQKAINVLYENQKLIANQFNSAIGKIQDSLSSTASALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLAKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITTDNTFVSGNCDVVIGTNSVAYSNNSIAIPTNFTISVTTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNFSQILPDPSKPSKRSFIEDLLFNKVTLADAGFTIDKEKWKEWRKEMENLTKEIKETLEEARKTLKQAEETFKTPSSGGTDDDDKTGSLNDIFEAQKIEWHEQGSHHHHHHHH
Protein #2 225 residues (80% resolved)

EVQLVESGGGVVQPGRSLRISCAVSGFTFGSYAMHWVRQAPGKGLEWVGVMSSDGHNEYYADSVKGRFTISRDNSRNKLYLEMNNLRVDDTAVFYCARGSDYVDDSPPLHYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSC

EVQLVESGGGVVQPGRSLRISCAVSGFTFGSYAMHWVRQAPGKGLEWVGVMSSDGHNEYYADSVKGRFTISRDNSRNKLYLEMNNLRVDDTAVFYCARGSDYVDDSPPLHYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSC
Protein #3 214 residues (70% resolved)

DIQLTQSPSSLSASIGDRVTITCRASQDIANKLAWFQQAPGKAPKSLIYAASRLQSGVPSQFSGSGSGTDFTLTIESLQAGDFATYFCQQYDSFPFTFGPGTKVDVKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC

DIQLTQSPSSLSASIGDRVTITCRASQDIANKLAWFQQAPGKAPKSLIYAASRLQSGVPSQFSGSGSGTDFTLTIESLQAGDFATYFCQQYDSFPFTFGPGTKVDVKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC
Non polymer #4 NAG

InChI=1S/C8H15NO6/c1-3(11)9-5-7(13)6(12)4(2-10)15-8(5)14/h4-8,10,12-14H,2H2,1H3,(H,9,11)/t4-,5-,6-,7-,8-/m1/s1

CC(=O)N[C@@H]1[C@H]([C@@H]([C@H](O[C@H]1O)CO)O)O
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Reference