2026-03-14_00000101|ligand|8FPA

Structure of a chimeric antibody (Fab) fragment bound to de-N-acetyl polysialic acid (dPSA); X-ray diffraction 1.83Å
Protein #1 226 residues (97% resolved)

EVQLVESGGGLVQPGDSLRLSCAASGFTFTPYYMGWVRQAPGKGLEWVGYIRNKANGYTTEYSASVKGRFTISRDNSQSSLYLQMNSLKTEDTAVYYCARYARGTVDSWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTH

EVQLVESGGGLVQPGDSLRLSCAASGFTFTPYYMGWVRQAPGKGLEWVGYIRNKANGYTTEYSASVKGRFTISRDNSQSSLYLQMNSLKTEDTAVYYCARYARGTVDSWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTH
Protein #2 219 residues (99% resolved)

DIVMTQTPLSLSVTPGQPASISCKSSQSLLHSNGKTYLNWLLQKPGQSPQLLIYLVSKLESGVPDRFSGSGSGTDFTLKISRVEAEDLGLYYCLQIIHFPHTFGQGTKVEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC

DIVMTQTPLSLSVTPGQPASISCKSSQSLLHSNGKTYLNWLLQKPGQSPQLLIYLVSKLESGVPDRFSGSGSGTDFTLKISRVEAEDLGLYYCLQIIHFPHTFGQGTKVEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC
Non polymer #3 ACY

InChI=1S/C2H4O2/c1-2(3)4/h1H3,(H,3,4)

CC(=O)O
Non polymer #4 PEG

InChI=1S/C4H10O3/c5-1-3-7-4-2-6/h5-6H,1-4H2

C(COCCO)O
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Reference