3AB0: BclA protein

Crystal structure of complex of the Bacillus anthracis major spore surface protein BclA with ScFv antibody fragment. Determined by X-ray diffraction at 3.09 Å resolution. Released 1 Dec 2010.

Method: X-ray diffraction
Resolution: 3.09 Å
Organisms: Bacillus anthracis, Mus musculus
Chains: 6
Atoms: 5,316
Mol. weight: 75.46 kDa
Released: 1 Dec 2010

Explore 3AB0 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

3AB0 contains 15 α-helices and 79 β-strands across 6 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: 4 helices, 16 β-strands

Element	Residues	Length	Sheet
β-strand	85-92	8	1
β-strand	98-99	2	2
α-helix	103	1
β-strand	104	1	3
α-helix	105-106	2
β-strand	109-114	6	1
β-strand	118-120	3	3
β-strand	126-128	3	3
β-strand	132-141	10	1
β-strand	142	1	4
β-strand	149-155	7	3
β-strand	158-159	2	3
α-helix	160	1
β-strand	165-166	2	3
β-strand	173-182	10	1
β-strand	187-195	9	3
β-strand	198-199	2	2
β-strand	200	1	4
α-helix	201	1
β-strand	204-214	11	1

Chain B: 2 helices, 12 β-strands

Element	Residues	Length	Sheet
β-strand	3-7	5	5
β-strand	11-12	2	6
β-strand	19-25	7	5
α-helix	29-31	3
β-strand	34-39	6	7
β-strand	45-51	7	7
β-strand	57-59	3	7
β-strand	68-72	5	5
β-strand	77-81	5	5
α-helix	87-89	3
β-strand	91-99	9	7
β-strand	102-106	5	7
β-strand	110-112	3	7
β-strand	113-114	2	6

Chain C: 2 helices, 10 β-strands

Element	Residues	Length	Sheet
β-strand	6-8	3	8
β-strand	11-13	3	9
β-strand	20-30	11	8
β-strand	34-38	5	9
β-strand	45-49	5	9
β-strand	53-54	2	9
β-strand	62-75	14	8
α-helix	80-82	3
β-strand	85-90	6	9
α-helix	96	1
β-strand	97-98	2	9
β-strand	102-105	4	9

Chain D: 2 helices, 16 β-strands

Element	Residues	Length	Sheet
β-strand	85-90	6	10
β-strand	98-99	2	11
β-strand	104	1	12
β-strand	109-114	6	10
β-strand	118-120	3	12
β-strand	126-128	3	12
β-strand	132-140	9	10
β-strand	142	1	13
β-strand	150-155	6	12
β-strand	158-159	2	12
α-helix	160	1
β-strand	165-166	2	12
β-strand	174-182	9	10
β-strand	187-193	7	12
β-strand	198-199	2	11
β-strand	200	1	13
α-helix	201	1
β-strand	206-214	9	10

Chain E: 3 helices, 12 β-strands

Element	Residues	Length	Sheet
β-strand	3-7	5	14
β-strand	11	1	15
β-strand	18-25	8	14
α-helix	29-31	3
β-strand	34-39	6	16
β-strand	45-51	7	16
β-strand	58-59	2	16
α-helix	61-63	3
β-strand	68-72	5	14
β-strand	77-82	6	14
α-helix	87-89	3
β-strand	91-99	9	16
β-strand	102-106	5	16
β-strand	110-112	3	16
β-strand	113	1	15

Chain F: 2 helices, 13 β-strands

Element	Residues	Length	Sheet
β-strand	5-8	4	17
β-strand	11	1	18
β-strand	20-26	7	17
β-strand	30	1	19
β-strand	34-38	5	18
α-helix	43-44	2
β-strand	45-49	5	18
β-strand	53-54	2	18
β-strand	62-67	6	17
β-strand	68	1	19
β-strand	70-75	6	17
α-helix	80-82	3
β-strand	85-90	6	18
β-strand	97-98	2	18
β-strand	102-103	2	18

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
BclA protein	A, D	protein	136	Bacillus anthracis	Q81JD7 (AlphaFold model)
antibody ScFv fragment, heavy chain	B, E	protein	117	Mus musculus	P18527 (AlphaFold model)
antibody ScFv fragment, light chain	C, F	protein	106	Mus musculus	A0A0G2JH00 (AlphaFold model)

Sequence of entity 1 (A, D), FASTA

>3AB0_1 BclA protein (chains A, D)
GLGLPAGLYAFNSGGISLDLGINDPVPFNTVGSKFGTAISQLDADTFVISETGFYKITVI
ANTATASVLGGLTIQVNGVPVPGTGSSLISLGAPIVIQAITQITTTPSLVEVIVTGLGLS
LALGTSASIIIEKVAL

Sequence of entity 2 (B, E), FASTA

>3AB0_2 antibody ScFv fragment, heavy chain (chains B, E)
EVKLVESGGGLVKPGGSLKLSCSASGFTFSSYAMSWVRQTPEKRLEWVASISTGGDTHYQ
DSVKGRFTTSRDNARNILTLQMSSLRSEDTAMYYCARNRGWYFDVWGAGTTVTVSSG

Sequence of entity 3 (C, F), FASTA

>3AB0_3 antibody ScFv fragment, light chain (chains C, F)
SQIVLTQSPAIMSASPGEKVTISCSARSSVSYMYWYQQKSGSSPKPWIYRTSNLASGVPA
RFSGSGSGTSYSLTISSMEAEDAATYYCQQYHSYPPTFGGGTKLEI

Primary citation

Isolation, kinetic analysis, and structural characterization of an antibody targeting the Bacillus anthracis major spore surface protein BclA. Nuttall, S.D., Wilkins, M.L., Streltsov, V.A. et al. Proteins (2011) 79:1306-1317. DOI 10.1002/prot.22971 · PubMed

Other PDB entries of the same protein (UniProt Q81JD7 (AlphaFold model), which also has an AlphaFold model), best resolution first:

2R6Q 1.43 Å, Crystal Structure of BclA-island Construct
3TYJ 2.15 Å, Bacillus collagen-like protein of anthracis P159S mutant
3TWI 2.55 Å, Variable Lymphocyte Receptor Recognition of the Immunodominant Glycoprotein of Bacillus…

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