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- PDB-5vqm: Clostridium difficile TcdB-GTD bound to PA41 Fab -

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Basic information

Entry
Database: PDB / ID: 5vqm
TitleClostridium difficile TcdB-GTD bound to PA41 Fab
Components
  • PA41 FAB HEAVY CHAIN
  • PA41 FAB LIGHT CHAIN
  • Toxin B
KeywordsTOXIN/IMMUNE SYSTEM / toxin antibody / TOXIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


host cell cytosol / glycosyltransferase activity / : / cysteine-type peptidase activity / immunoglobulin complex, circulating / immunoglobulin receptor binding / host cell endosome membrane / complement activation, classical pathway / antigen binding / toxin activity ...host cell cytosol / glycosyltransferase activity / : / cysteine-type peptidase activity / immunoglobulin complex, circulating / immunoglobulin receptor binding / host cell endosome membrane / complement activation, classical pathway / antigen binding / toxin activity / antibacterial humoral response / blood microparticle / immune response / lipid binding / host cell plasma membrane / extracellular space / extracellular exosome / extracellular region / metal ion binding / plasma membrane
Similarity search - Function
Arc Repressor Mutant, subunit A - #1780 / Methane Monooxygenase Hydroxylase; Chain G, domain 1 - #1190 / TcdA/TcdB toxin, N-terminal helical domain / TcdB toxin N-terminal helical domain / TcdA/TcdB toxin, catalytic glycosyltransferase domain / Membrane Localization Domain / TcdA/TcdB catalytic glycosyltransferase domain / TcdA/TcdB toxin, pore forming domain / TcdA/TcdB pore forming domain / CGT/MARTX, cysteine protease (CPD) domain ...Arc Repressor Mutant, subunit A - #1780 / Methane Monooxygenase Hydroxylase; Chain G, domain 1 - #1190 / TcdA/TcdB toxin, N-terminal helical domain / TcdB toxin N-terminal helical domain / TcdA/TcdB toxin, catalytic glycosyltransferase domain / Membrane Localization Domain / TcdA/TcdB catalytic glycosyltransferase domain / TcdA/TcdB toxin, pore forming domain / TcdA/TcdB pore forming domain / CGT/MARTX, cysteine protease (CPD) domain / CGT/MARTX, cysteine protease (CPD) domain superfamily / Peptidase C80 family / CGT/MARTX cysteine protease (CPD) domain profile. / Choline-binding repeat / Putative cell wall binding repeat / Cell wall/choline-binding repeat / Cell wall-binding repeat profile. / Nucleotide-diphospho-sugar transferases / Methane Monooxygenase Hydroxylase; Chain G, domain 1 / Immunoglobulin V-Type / Immunoglobulin V-set domain / Immunoglobulin V-set domain / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulin subtype / Immunoglobulin / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Arc Repressor Mutant, subunit A / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulins / Immunoglobulin-like fold / Up-down Bundle / Immunoglobulin-like / Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
Toxin B / Ig-like domain-containing protein / IgG H chain
Similarity search - Component
Biological speciesPeptoclostridium difficile (bacteria)
Homo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.79 Å
AuthorsKroh, H.K. / Spiller, B.W. / Lacy, D.B.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI095755 United States
CitationJournal: J. Biol. Chem. / Year: 2018
Title: A neutralizing antibody that blocks delivery of the enzymatic cargo of Clostridium difficile toxin TcdB into host cells.
Authors: Kroh, H.K. / Chandrasekaran, R. / Zhang, Z. / Rosenthal, K. / Woods, R. / Jin, X. / Nyborg, A.C. / Rainey, G.J. / Warrener, P. / Melnyk, R.A. / Spiller, B.W. / Lacy, D.B.
History
DepositionMay 9, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 6, 2017Provider: repository / Type: Initial release
Revision 1.1Jan 31, 2018Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.year
Revision 1.2Dec 11, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.3Oct 4, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Toxin B
L: PA41 FAB LIGHT CHAIN
H: PA41 FAB HEAVY CHAIN
B: Toxin B
C: PA41 FAB LIGHT CHAIN
D: PA41 FAB HEAVY CHAIN


Theoretical massNumber of molelcules
Total (without water)223,3746
Polymers223,3746
Non-polymers00
Water2,630146
1
A: Toxin B
L: PA41 FAB LIGHT CHAIN
H: PA41 FAB HEAVY CHAIN


Theoretical massNumber of molelcules
Total (without water)111,6873
Polymers111,6873
Non-polymers00
Water543
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: Toxin B
C: PA41 FAB LIGHT CHAIN
D: PA41 FAB HEAVY CHAIN


Theoretical massNumber of molelcules
Total (without water)111,6873
Polymers111,6873
Non-polymers00
Water543
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)96.130, 251.740, 224.450
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number20
Space group name H-MC2221

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Components

#1: Protein Toxin B


Mass: 64535.160 Da / Num. of mol.: 2 / Fragment: TcdB glucosyltransferase domain residues 1-544
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Peptoclostridium difficile (bacteria) / Strain: R20291 / Gene: tcdB, CDR20291_0582 / Plasmid: pHis1622 / Production host: Bacillus megaterium (bacteria) / References: UniProt: C9YJ35
#2: Antibody PA41 FAB LIGHT CHAIN


Mass: 23388.027 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: Q8TCD0
#3: Antibody PA41 FAB HEAVY CHAIN


Mass: 23763.766 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: S6B291
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 146 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 3.05 Å3/Da / Density % sol: 59.68 %
Crystal growTemperature: 294 K / Method: vapor diffusion, hanging drop / pH: 5.5 / Details: 0.1 M Bis-Tris pH 5.5 1 M NaCl 11% PEG3350

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 21-ID-F / Wavelength: 0.97872 Å
DetectorType: RAYONIX MX-225 / Detector: CCD / Date: Feb 11, 2015
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97872 Å / Relative weight: 1
ReflectionResolution: 2.79→60.85 Å / Num. obs: 68012 / % possible obs: 99.9 % / Redundancy: 8.5 % / CC1/2: 0.996 / Rmerge(I) obs: 0.161 / Net I/σ(I): 7.5
Reflection shellResolution: 2.79→2.84 Å / Redundancy: 6.3 % / Rmerge(I) obs: 1.526 / Num. unique obs: 3378 / CC1/2: 0.569 / % possible all: 99.9

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Processing

Software
NameVersionClassification
PHENIX(1.12_2829)refinement
xia2data reduction
XSCALEdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2BVM, 3L5X
Resolution: 2.79→60.849 Å / SU ML: 0.49 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 35.94 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.2916 2500 3.68 %
Rwork0.2405 --
obs0.2424 67920 99.8 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Refinement stepCycle: LAST / Resolution: 2.79→60.849 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms15152 0 0 146 15298
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.00215468
X-RAY DIFFRACTIONf_angle_d0.45520958
X-RAY DIFFRACTIONf_dihedral_angle_d11.2439384
X-RAY DIFFRACTIONf_chiral_restr0.0392338
X-RAY DIFFRACTIONf_plane_restr0.0032700
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
2.79-2.84370.46661380.41383604X-RAY DIFFRACTION100
2.8437-2.90170.42011370.36813580X-RAY DIFFRACTION100
2.9017-2.96480.33861370.33623589X-RAY DIFFRACTION100
2.9648-3.03380.40521380.33073604X-RAY DIFFRACTION100
3.0338-3.10960.3581400.32873611X-RAY DIFFRACTION100
3.1096-3.19370.38051360.32673624X-RAY DIFFRACTION100
3.1937-3.28770.38361370.32533593X-RAY DIFFRACTION100
3.2877-3.39380.37261390.29183599X-RAY DIFFRACTION100
3.3938-3.51510.34811380.27963599X-RAY DIFFRACTION100
3.5151-3.65580.32061390.2623619X-RAY DIFFRACTION100
3.6558-3.82210.27031380.2573642X-RAY DIFFRACTION100
3.8221-4.02360.26611380.23523621X-RAY DIFFRACTION100
4.0236-4.27560.26421390.20593626X-RAY DIFFRACTION100
4.2756-4.60570.22871410.1893669X-RAY DIFFRACTION100
4.6057-5.0690.22981390.18213645X-RAY DIFFRACTION100
5.069-5.80190.26621410.20373683X-RAY DIFFRACTION100
5.8019-7.30790.311400.22483709X-RAY DIFFRACTION100
7.3079-60.86350.25181450.20643803X-RAY DIFFRACTION98
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL112)L122)L132)L222)L232)L332)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T112)T122)T132)T222)T232)T332)Origin x (Å)Origin y (Å)Origin z (Å)
13.48912.9406-2.4684.5814-2.54093.890.0192-0.136-0.56260.2436-0.2657-0.1490.29350.19490.27820.6250.03680.06790.441-0.02440.718419.55756.248644.5213
24.60560.07993.62042.5624-0.75214.2362-0.1010.39940.4152-0.78720.2290.39940.0252-0.1224-0.11560.7859-0.10880.05560.77220.14710.649222.749333.07524.9358
31.95410.3681.64311.21010.55087.3525-0.04290.1931-0.1443-0.8327-0.0124-0.27560.26920.39870.01970.68650.08530.1170.65220.01750.600632.168824.946314.5338
48.5119-0.17533.03995.30862.42153.50860.0824-0.7187-1.09840.04870.1720.13930.4787-0.744-0.24010.4215-0.2142-0.0210.62470.11850.642532.906646.948738.7592
51.55031.1029-0.59633.29350.54440.9539-0.33950.3029-0.0475-0.5980.30510.1840.0842-0.05810.05970.5368-0.1121-0.0130.66660.1250.51725.007430.318126.5746
62.40920.74510.47295.1777-1.87.6046-0.3410.71240.2593-0.31990.35550.6624-0.2995-1.0725-0.02550.6432-0.07360.01930.82990.04030.721313.542522.883727.6077
71.9027-3.38242.57186.5921-4.5493.7516-0.3767-0.01910.02570.42380.53971.1862-0.9217-1.2833-0.22440.75080.06270.05471.0204-0.12431.186624.257140.323525.0879
84.77691.8818-3.47855.77930.04372.89330.0168-0.74311.61420.5512-0.2851.0059-0.29160.0279-0.32010.4556-0.14480.13670.7095-0.14740.657251.390577.190345.3673
98.99271.3265-1.49766.50282.5355.21750.4236-0.8576-0.06990.0261-0.4435-0.17030.05540.14490.04670.3547-0.15320.03970.64980.0390.399451.683365.824643.1159
105.6693.6146.1245.46863.19877.18621.0161-0.7533-0.14480.554-0.688-0.10480.3191-0.0803-0.24560.522-0.11970.12130.7827-0.00310.391852.809569.978346.9261
114.2517-0.72352.19589.33860.46345.20990.3816-0.22880.5445-0.4172-0.13970.9388-0.217-1.2115-0.54810.3267-0.02190.12780.7864-0.04440.378544.799967.752233.2712
120.50410.72350.30476.302-1.66484.29750.07890.37420.1440.1482-0.6514-0.3681-0.53121.1640.80410.6028-0.17480.02510.96120.06310.642773.652392.96934.9664
134.98852.7384-3.98433.9141-2.5736.36510.0918-0.08070.303-0.5094-0.25180.1409-0.28640.6430.24970.557-0.13460.0320.7151-0.10150.499668.320194.197835.1603
144.58120.8675-3.1086.5035-2.0933.2879-0.09141.09530.7237-1.89640.1916-0.5525-1.12770.0219-0.05952.2805-1.0855-0.14830.64980.31961.024472.8755101.265221.4889
151.82430.3952-0.51865.6939-5.43825.3959-0.70860.71920.421-1.61410.5964-0.6741-1.11920.66280.12911.6141-0.6620.19810.8597-0.04050.965272.9154105.461234.5451
164.22171.2533-1.78130.5097-0.20095.5827-0.66280.5118-0.8424-0.68850.3025-1.20720.19150.47180.38640.6892-0.11360.27020.6165-0.10260.688160.306759.470224.0372
178.09361.0944-0.99415.3859-3.83656.26530.251-0.0202-0.4104-1.4877-0.11950.2925-0.3019-0.3446-0.11790.4098-0.19520.04960.59520.08310.501450.21361.112624.7112
183.85692.4149-0.63344.91290.23842.2886-0.44050.4384-0.107-1.27830.3841-0.71240.1830.39780.10830.6067-0.110.29220.6707-0.07670.648660.444368.383922.6834
198.76630.82940.45397.48151.66055.6633-0.24780.4694-0.4508-0.98990.7036-1.16360.84552.4358-0.35290.8030.11440.25460.9879-0.08670.690176.323483.992127.4502
200.90110.07741.91716.38970.09393.52730.3081-1.5544-0.8281-0.6051-0.5236-2.3736-0.66361.4898-0.13230.526-0.10740.06042.49770.01451.442987.240986.424429.5487
212.57942.63492.28154.70692.34913.5333-0.0118-0.04180.27320.3391-0.07340.4132-0.2535-0.14040.07940.44420.0094-0.04570.44170.10890.572228.454998.945344.5422
223.18160.4248-0.94321.82680.11994.3973-0.29120.5035-0.5338-0.81290.17090.11120.6547-0.12560.11411.0486-0.2919-0.15490.66950.08370.725521.946567.92210.6077
234.9764-0.8906-0.20511.60770.23922.7751-0.08711.2036-0.247-0.90870.16370.1032-0.20690.3384-0.10351.1597-0.2069-0.11231.20090.05610.776521.937377.93282.2828
242.43241.12761.32064.2502-1.30632.9028-0.22410.1010.2472-0.52480.3790.3912-0.07180.2269-0.11540.3815-0.1057-0.04810.6258-0.06360.444917.667371.144227.554
251.13041.46850.34244.6584-0.73591.1558-0.31190.28210.1302-0.72180.33960.2142-0.05440.1909-0.0210.5486-0.1223-0.12820.71860.05740.547422.900374.811726.5793
264.3929-0.788-4.28064.82822.74294.9741-0.7452-0.171-0.3633-0.40160.7858-0.5620.7041.3295-0.02620.7744-0.06940.01680.78520.07290.627335.311282.512425.7969
270.92870.39991.08950.36060.28461.2639-0.10490.2065-0.2978-0.08080.3681-0.51230.20980.5693-0.31690.573-0.0946-0.11750.78820.21831.060924.158868.289328.4737
283.32662.0131-4.09498.16321.05677.3129-0.2381-0.3843-0.6299-0.17710.0598-0.20811.2586-0.3049-0.15530.4868-0.1523-0.22950.90110.20390.7007-3.515627.981445.3664
295.2820.3003-1.72965.6567-0.22045.69150.3856-0.75810.0230.3259-0.13340.05540.0774-0.3986-0.28130.463-0.2437-0.11770.63160.1090.5454-2.581838.694244.4421
305.02683.873-1.60575.6626-1.59924.49270.0809-0.14810.3472-0.2901-0.13140.47760.0365-0.06540.03940.4459-0.0534-0.1470.82880.03790.5494-4.204135.507840.3196
314.08873.70062.81973.67962.86742.24170.6652-0.9463-0.23390.175-2.0549-0.3729-0.16080.0131.26260.6127-0.2001-0.12490.79740.11670.7298-16.740918.736848.3841
324.3471-1.2888-0.23953.10561.03250.3539-1.70770.59320.3836-1.0688-0.47730.3979-0.219-2.35921.73391.2577-0.3914-0.47781.3152-0.14571.1424-32.48077.284125.1449
336.3816-0.28213.67589.14691.3273.7573-0.12420.3423-0.3018-1.03520.10540.44810.4526-0.28840.09450.6265-0.1568-0.090.81430.08880.6075-20.338610.917635.0779
348.64031.86446.61618.89165.93598.3236-1.43772.2892-0.7027-1.39790.81220.84711.7090.72550.30221.6238-0.6899-0.24691.6798-0.26251.1107-24.65653.856821.4002
354.29364.47872.79755.70324.73844.4804-0.75451.60230.9236-0.35850.20511.56241.5322-0.08040.74071.3522-0.246-0.2410.9979-0.04651.0831-24.7116-0.393234.3583
361.09552.25231.31196.08073.19997.1484-0.18790.31090.6115-2.9447-0.63761.6422-1.321-0.48340.68531.13240.0504-0.54341.48830.13150.9448-17.109541.508920.589
375.61620.09961.73061.12240.13496.4964-0.34770.26280.9495-0.91980.40030.18950.182-0.2322-0.02340.6512-0.1758-0.37011.00420.28370.8062-6.55946.563125.796
384.64382.79020.93572.20711.18151.4032-0.45650.93650.5243-1.44560.39780.4732-0.1015-0.6460.15431.0569-0.2371-0.42041.14830.32650.8525-9.603340.54621.9688
390.3254-0.15310.6192.1389-1.22281.7574-0.08010.4497-0.37150.41480.06190.02670.161-0.2029-0.46740.7966-0.4243-0.65032.16980.59661.1709-35.571910.135529.6029
408.6693.1389-5.21848.60051.99528.24170.34440.57930.0914-1.66960.29011.4143-1.4481-2.223-0.26080.9524-0.0515-0.45941.36740.25550.9745-28.725821.140827.4209
417.22252.7164-6.89817.8372-2.326.45380.6157-0.93180.6695-0.0251-0.35544.2023-0.7526-2.5356-0.58730.7219-0.3631-0.06912.0121-0.05451.8789-39.481814.963236.7786
424.24954.84862.31878.19761.49185.08581.2283-1.54450.15630.8287-1.88870.66660.3271-0.90470.75520.9506-0.0308-0.36341.93750.02741.4878-38.355720.130424.4644
Refinement TLS group
IDRefine-IDRefine TLS-IDSelection details
1X-RAY DIFFRACTION1chain 'A' and (resid 2 through 108 )
2X-RAY DIFFRACTION2chain 'A' and (resid 109 through 217 )
3X-RAY DIFFRACTION3chain 'A' and (resid 218 through 295 )
4X-RAY DIFFRACTION4chain 'A' and (resid 296 through 324 )
5X-RAY DIFFRACTION5chain 'A' and (resid 325 through 438 )
6X-RAY DIFFRACTION6chain 'A' and (resid 439 through 501 )
7X-RAY DIFFRACTION7chain 'A' and (resid 502 through 529 )
8X-RAY DIFFRACTION8chain 'L' and (resid 1 through 18 )
9X-RAY DIFFRACTION9chain 'L' and (resid 19 through 61 )
10X-RAY DIFFRACTION10chain 'L' and (resid 62 through 90 )
11X-RAY DIFFRACTION11chain 'L' and (resid 91 through 102 )
12X-RAY DIFFRACTION12chain 'L' and (resid 103 through 128 )
13X-RAY DIFFRACTION13chain 'L' and (resid 129 through 174 )
14X-RAY DIFFRACTION14chain 'L' and (resid 175 through 188 )
15X-RAY DIFFRACTION15chain 'L' and (resid 189 through 214 )
16X-RAY DIFFRACTION16chain 'H' and (resid 1 through 40 )
17X-RAY DIFFRACTION17chain 'H' and (resid 41 through 60 )
18X-RAY DIFFRACTION18chain 'H' and (resid 61 through 141 )
19X-RAY DIFFRACTION19chain 'H' and (resid 142 through 185 )
20X-RAY DIFFRACTION20chain 'H' and (resid 186 through 222 )
21X-RAY DIFFRACTION21chain 'B' and (resid 2 through 108 )
22X-RAY DIFFRACTION22chain 'B' and (resid 109 through 167 )
23X-RAY DIFFRACTION23chain 'B' and (resid 168 through 251 )
24X-RAY DIFFRACTION24chain 'B' and (resid 252 through 324 )
25X-RAY DIFFRACTION25chain 'B' and (resid 325 through 438 )
26X-RAY DIFFRACTION26chain 'B' and (resid 439 through 494 )
27X-RAY DIFFRACTION27chain 'B' and (resid 495 through 529 )
28X-RAY DIFFRACTION28chain 'C' and (resid 1 through 18 )
29X-RAY DIFFRACTION29chain 'C' and (resid 19 through 75 )
30X-RAY DIFFRACTION30chain 'C' and (resid 76 through 102 )
31X-RAY DIFFRACTION31chain 'C' and (resid 103 through 113 )
32X-RAY DIFFRACTION32chain 'C' and (resid 114 through 128 )
33X-RAY DIFFRACTION33chain 'C' and (resid 129 through 174 )
34X-RAY DIFFRACTION34chain 'C' and (resid 175 through 188 )
35X-RAY DIFFRACTION35chain 'C' and (resid 189 through 214 )
36X-RAY DIFFRACTION36chain 'D' and (resid 1 through 17 )
37X-RAY DIFFRACTION37chain 'D' and (resid 18 through 60 )
38X-RAY DIFFRACTION38chain 'D' and (resid 61 through 125 )
39X-RAY DIFFRACTION39chain 'D' and (resid 126 through 141 )
40X-RAY DIFFRACTION40chain 'D' and (resid 142 through 183 )
41X-RAY DIFFRACTION41chain 'D' and (resid 184 through 200 )
42X-RAY DIFFRACTION42chain 'D' and (resid 201 through 222 )

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