9HZK: SdAb9

sdAb9 in complex with PfCSP aTSR domain. Determined by X-ray diffraction at 2.07 Å resolution. Released 23 Apr 2025.

Method: X-ray diffraction
Resolution: 2.07 Å
Organisms: Plasmodium falciparum NF54, Lama glama
Chains: 2
Atoms: 1,641
Mol. weight: 27.46 kDa
Released: 23 Apr 2025

Explore 9HZK in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9HZK contains 9 α-helices and 16 β-strands across 2 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 3 helices, 13 β-strands

Element	Residues	Length	Sheet
β-strand	4-7	4	3
β-strand	11-13	3	4
β-strand	18-24	7	3
α-helix	29-31	3
β-strand	33-39	7	5
β-strand	46-51	6	5
β-strand	58-60	3	5
β-strand	69-73	5	3
β-strand	78-83	6	3
α-helix	88-90	3
β-strand	92-99	8	5
β-strand	105	1	2
α-helix	109-111	3
β-strand	114-115	2	5
β-strand	119-121	3	5
β-strand	122-124	3	4

Chain B: 6 helices, 3 β-strands

Element	Residues	Length	Sheet
α-helix	313-322	10
α-helix	324-326	3
α-helix	331-334	4
β-strand	340-346	7	1
α-helix	348-350	3
α-helix	355-357	3
β-strand	359	1	2
β-strand	364-370	7	1
α-helix	373-375	3

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Circumsporozoite protein	B	protein	91	Plasmodium falciparum NF54	P19597 (AlphaFold model)
sdAb9	A	protein	144	Lama glama

Sequence of entity 1 (B), FASTA

>9HZK_1 Circumsporozoite protein (chains B)
MEPSDKHIKEYLNKIQNSLSTEWSPCSVTCGNGIQVRIKPGSANKPKDELDYANDIEKKI
CKMEKCSSVFNVVNSSENLYFQSGGHHHHHH

Sequence of entity 2 (A), FASTA

>9HZK_2 sdAb9 (chains A)
QVQLQESGGGLVQAGGSLRLSCAASGRTFSSYSMGWFRQVPGKEREFVARITSSGGNTDY
ADSAKGRFTISRDNAKNTVYLQMSTLKPEDTAVYYCAADLWQYGRNSRAADYDYWGQGTQ
VTVSSAAAYPYDVPDYGSHHHHHH

Primary citation

Evidence for a model of conformational change by the Plasmodium falciparum circumsporozoite protein during sporozoite development in the mosquito host through the use of camelid single-domain antibodies. Geens, R., De Vocht, L., Aguirre-Botero, M.C. et al. Infect Immun (2025) 93:e0008125-e0008125. DOI 10.1128/iai.00081-25 · PubMed

Other PDB entries of the same protein (UniProt P19597 (AlphaFold model), which also has an AlphaFold model), best resolution first:

6O24 1.4 Å, Crystal structure of 4498 Fab in complex with circumsporozoite protein NANP3 and…
8FDD 1.54 Å, Crystal structure of Ky15.3 Fab in complex with circumsporozoite protein NPDP peptide
8FAS 1.55 Å, Crystal structure of Ky230 Fab in complex with circumsporozoite protein NANP5 peptide
6VLN 1.63 Å, Crystal structure of 4498 Fab in complex with circumsporozoite protein DND3 and…
8FB8 1.69 Å, Crystal structure of Ky15.10-Y100EK Fab in complex with circumsporozoite protein KQPA…
6ULF 1.7 Å, Crystal structure of 4498 Fab in complex with circumsporozoite protein NDN3 and…
8F9U 1.7 Å, Crystal structure of Ky15.7 Fab in complex with circumsporozoite protein NPDP peptide
8FB7 1.75 Å, Crystal structure of Ky15.10 Fab in complex with circumsporozoite protein NPDP peptide
6O26 1.8 Å, Crystal structure of 3246 Fab in complex with circumsporozoite protein NANA
8FA7 1.8 Å, Crystal structure of Ky15.11 Fab in complex with circumsporozoite protein KQPA peptide
8FA8 1.8 Å, Crystal structure of Ky15.11 Fab in complex with circumsporozoite protein NDN peptide
8FDC 1.8 Å, Crystal structure of Ky311 Fab in complex with circumsporozoite protein KQPA peptide

Browse structure collections

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