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- PDB-9hxo: A01 mAbs bound to cobratoxin at pH 6.0 -

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Basic information

Entry
Database: PDB / ID: 9hxo
TitleA01 mAbs bound to cobratoxin at pH 6.0
Components
  • Alpha-cobratoxin
  • heavy chain
  • light chain
KeywordsTOXIN / cobratoxin / mAB / pH sensitivity
Function / homology
Function and homology information


acetylcholine receptor inhibitor activity / ion channel regulator activity / toxin activity / extracellular region
Similarity search - Function
Snake toxin, conserved site / Snake toxins signature. / : / Snake toxin cobra-type / Snake three-finger toxin / Snake toxin-like superfamily
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Naja kaouthia (monocled cobra)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.49 Å
AuthorsWade, J.W. / Bohn, M.F. / Laustsen, A.H. / Morth, J.P.
Funding support Denmark, 1items
OrganizationGrant numberCountry
Novo Nordisk FoundationNNF20SA0066621 Denmark
CitationJournal: Mabs / Year: 2025
Title: Rational design of antibodies with pH-dependent antigen-binding properties using structural insights from broadly neutralizing antibodies against alpha-neurotoxins.
Authors: Wade, J. / Strancar, N. / Fernandez-Quintero, M.L. / Siebenhaar, S. / Jansen, T. / Meier, E.P.W. / Jenkins, T.P. / Bjorn, S.P. / Nguyen, G.T.T. / Lomonte, B. / Gutierrez, J.M. / Sorensen, C. ...Authors: Wade, J. / Strancar, N. / Fernandez-Quintero, M.L. / Siebenhaar, S. / Jansen, T. / Meier, E.P.W. / Jenkins, T.P. / Bjorn, S.P. / Nguyen, G.T.T. / Lomonte, B. / Gutierrez, J.M. / Sorensen, C.V. / Loeffler, J.R. / Paul, A. / Tulika, T. / Arnsdorf, J. / Schoffelen, S. / Lundquist, E.V.S. / Sorensen, J. / Ward, A.B. / Voldborg, B.G. / Bohn, M.F. / Rivera-de-Torre, E. / Morth, J.P. / Laustsen, A.H.
History
DepositionJan 7, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0Nov 19, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Alpha-cobratoxin
B: Alpha-cobratoxin
I: light chain
M: heavy chain
C: light chain
D: heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)71,31714
Polymers70,6726
Non-polymers6458
Water11,458636
1
A: Alpha-cobratoxin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)7,8782
Polymers7,8421
Non-polymers351
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area130 Å2
ΔGint-9 kcal/mol
Surface area5220 Å2
2
B: Alpha-cobratoxin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)8,0563
Polymers7,8421
Non-polymers2142
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area190 Å2
ΔGint2 kcal/mol
Surface area5300 Å2
3
I: light chain
M: heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)27,7055
Polymers27,4942
Non-polymers2113
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area1800 Å2
ΔGint-30 kcal/mol
Surface area12030 Å2
4
C: light chain
D: heavy chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)27,6784
Polymers27,4942
Non-polymers1842
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area1690 Å2
ΔGint-8 kcal/mol
Surface area11560 Å2
Unit cell
Length a, b, c (Å)76.947, 82.653, 98.190
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number19
Space group name H-MP212121
Space group name HallP2ac2ab
Symmetry operation#1: x,y,z
#2: x+1/2,-y+1/2,-z
#3: -x,y+1/2,-z+1/2
#4: -x+1/2,-y,z+1/2

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein Alpha-cobratoxin / Alpha-CT / Alpha-CbT / Alpha-Cbtx / Alpha-Ctx / Alpha-elapitoxin-Nk2a / Alpha-EPTX-Nk2a / Long ...Alpha-CT / Alpha-CbT / Alpha-Cbtx / Alpha-Ctx / Alpha-elapitoxin-Nk2a / Alpha-EPTX-Nk2a / Long neurotoxin 1 / Siamensis 3


Mass: 7842.094 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: alpha cobratoxin / Source: (natural) Naja kaouthia (monocled cobra) / References: UniProt: P01391

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Antibody , 2 types, 4 molecules ICMD

#2: Antibody light chain


Mass: 15073.576 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Details: light chain AO1 / Source: (gene. exp.) Homo sapiens (human)
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
#3: Antibody heavy chain


Mass: 12420.419 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Details: AO1 heavy chain / Source: (gene. exp.) Homo sapiens (human)
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)

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Non-polymers , 6 types, 644 molecules

#4: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#5: Chemical
ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C3H8O3
#6: Chemical ChemComp-TRS / 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL / TRIS BUFFER


Mass: 122.143 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H12NO3 / Comment: pH buffer*YM
#7: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#8: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#9: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 636 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
Has protein modificationY

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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: 2.21 Å3/Da / Density % sol: 44.32 %
Crystal growTemperature: 293 K / Method: vapor diffusion / pH: 6
Details: 25% PEG3350, 0.1M Bis-Tris pH 6.0, 0.3 M Ammonium Sulphate

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: PETRA III, EMBL c/o DESY / Beamline: P14 (MX2) / Wavelength: 0.9537 Å
DetectorType: DECTRIS EIGER2 X 16M / Detector: PIXEL / Date: Oct 24, 2022
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9537 Å / Relative weight: 1
ReflectionResolution: 1.49→60.57 Å / Num. obs: 53424 / % possible obs: 52.03 % / Redundancy: 13.3 % / CC1/2: 0.999 / Rmerge(I) obs: 0.171 / Rpim(I) all: 0.048 / Net I/σ(I): 10.3
Reflection shellResolution: 1.49→1.52 Å / Rmerge(I) obs: 1 / Num. unique obs: 415 / CC1/2: 0.637 / Rpim(I) all: 0.479 / % possible all: 7.79

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Processing

Software
NameVersionClassification
PHENIX1.21rc1_5156refinement
autoPROCdata reduction
STARANISOdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.49→60.57 Å / SU ML: 0.1564 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 33.5963
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflection
Rfree0.2485 2612 4.89 %
Rwork0.2035 50811 -
obs0.2056 53423 52.03 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.1 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 21.8 Å2
Refinement stepCycle: LAST / Resolution: 1.49→60.57 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4812 0 39 636 5487
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.00525081
X-RAY DIFFRACTIONf_angle_d0.71186924
X-RAY DIFFRACTIONf_chiral_restr0.0713747
X-RAY DIFFRACTIONf_plane_restr0.0065907
X-RAY DIFFRACTIONf_dihedral_angle_d14.8741825
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
1.49-1.520.2434230.2997392X-RAY DIFFRACTION7.79
1.52-1.550.4069280.2928612X-RAY DIFFRACTION11.95
1.55-1.580.3473430.2864823X-RAY DIFFRACTION16.24
1.58-1.610.3605610.2885986X-RAY DIFFRACTION19.61
1.61-1.650.3072560.28241156X-RAY DIFFRACTION22.8
1.65-1.690.2864830.27761299X-RAY DIFFRACTION25.71
1.69-1.740.3012900.27691482X-RAY DIFFRACTION29.36
1.74-1.790.3031050.26851745X-RAY DIFFRACTION34.48
1.79-1.850.27931150.25352044X-RAY DIFFRACTION40.26
1.85-1.910.29811130.25482423X-RAY DIFFRACTION47.38
1.91-1.990.26221440.23772755X-RAY DIFFRACTION53.9
1.99-2.080.2841520.23343070X-RAY DIFFRACTION59.58
2.08-2.190.25461610.22083302X-RAY DIFFRACTION64.52
2.19-2.330.31212060.2293797X-RAY DIFFRACTION73.86
2.33-2.50.25852070.22464194X-RAY DIFFRACTION81.05
2.5-2.760.26972250.21914936X-RAY DIFFRACTION94.73
2.76-3.160.23682350.20385193X-RAY DIFFRACTION99.76
3.16-3.980.22122490.17215263X-RAY DIFFRACTION99.76
3.98-60.570.21363160.1615339X-RAY DIFFRACTION98.62
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)
11.085011724410.395358996661-0.07054406759281.03098655373-0.2211942308511.119647885550.228129343947-0.06793507521450.3062116267140.266909646092-0.06042986637720.374753090021-0.431606487084-0.0457134746275-0.0739980050320.226302065843-0.02363606004120.09995700709020.112904187821-0.07914401942930.09914347389341.5440660513811.388300249918.733889585
23.14527886994-0.0583264778032-0.3289727004872.100769749182.925642838755.567798205440.07560034583660.273872962170.231018852232-0.1472896400350.0576160992110.319910132011-0.906623909844-0.2043019553790.1168457205610.2760748320090.1307860035650.1105316942240.11843722510.09313308029320.400367971136-6.8422653303117.139007149216.1887218675
33.035619557240.496122871652-0.1362580755842.28931189924-1.687954774391.37044401939-0.003236320536110.32533078167-0.115283517224-0.0278086322690.05875052097710.116813681860.0781797846898-0.280950397893-0.009525515373720.120605447651-0.01701276159690.0436548791490.0232176009626-0.008735171465060.12670593967-1.810488413432.484933097316.9204905606
40.802087367284-0.2540247225460.1265117714280.9376962163950.4370528474581.77290738846-0.07638344163740.3173843674130.20732167865-0.144680919190.05114402943320.0679356745533-0.2037257478690.159203810076-0.03030723758860.125939023732-0.0386228124808-0.02570718171180.1929749507890.05834005419280.0651771672986-1.4648237840111.9671777643-16.3322835259
52.75040211939-0.751712844649-0.9330197027410.8748919089190.5754171515837.756376111480.138620610161-0.3524581413050.1693391319040.3980066383390.0182098658838-0.273670717849-0.3990844094910.0702548417151-0.1753278363250.281121700064-0.1318416024670.02517662567480.252382732772-0.01687621788550.1613724563887.238655041517.6488633438-13.8665532091
62.65711894811-0.149506070721-0.7441025564171.817886643290.4295749222294.0694268596-0.179728219504-0.100172091417-0.2715949888990.127561083744-0.07869829166190.001687874111020.049179086920.3137501186490.2476952823520.09817520807210.001953219228290.006400826093060.200729995847-0.008408591079450.09762663933841.94944871913.04420119442-15.1792147292
72.23243939229-0.1821996679270.1978291859151.281438229280.3583921432652.423255748340.08923144164370.2982805855450.026366576861-0.320156652345-0.1179504927040.0530620469953-0.155986881745-0.07684307217920.001845609788130.04856292378710.014417537355-0.01557400508620.07871330658710.07267940936130.0449479285767-31.7685039803-5.72967813733-9.87814492614
80.4378761562560.8464080633390.5156903788082.673784778110.4397040611330.901335544807-0.2409407864250.7245505483320.633426250376-0.7711130763080.01506405014670.575359048042-0.781132466511-0.5867585232860.07008653064170.2770477710570.063545361589-0.09289228404310.3853638193710.1213207028810.226134928409-20.02641447888.10462412757-11.2302870726
92.70022260770.5466984434360.1292551488391.69241788430.576796654121.023063450740.06200189791380.170244326398-0.0915744028165-0.02904453994030.0390151677409-0.0492905118031-0.008635706935880.0340259935059-0.083338457450.0674190495360.030136028397-0.01372099781510.0862562659652-0.002363305029760.0604080088745-22.116955818-9.01491235302-6.54382088174
103.641578799761.91157041027-0.6368442227141.26437981054-0.3838764496860.7418983041790.0300304828804-0.07010001540440.09880979810020.00702931378416-0.0179688783460.0760257755425-0.01939307425690.0576478976773-0.02482829797510.09511630189210.003357897387-0.00526461419740.06602463431590.01007937625460.0721385493386-20.95258618980.521976867796-3.77302400687
115.13548321010.7367468122342.710416034214.27820907723-0.9303502473781.84914988061-0.2115247638920.398508254429-0.482146675029-0.593131385524-0.00496000794398-0.4759690101060.2916912126090.3459630744080.1674959925440.2562144503730.03205584500380.05579277637010.08403924610890.02285851025680.194993772345-16.1832257365-9.1325755363213.2527351559
121.77872204646-0.0475253693921-0.5800474814570.8860898928950.2636763039091.807793272570.0334570607883-0.1308930603290.0634995547890.00390228694804-0.00103848896697-0.0890607278015-0.009175186021440.133712154568-0.03205807182630.0495372710168-0.001099009531780.004712305031510.03536279120460.01207412657740.0452264166207-22.5677454712.4074344726815.6859210376
133.460085008161.286082382670.4805194294821.287809822081.327997570132.074165415490.0624490212811-0.171634794324-0.1556554664450.0251618637630.075363883511-0.6182658031790.06343738156270.0642623214372-0.06129420953540.0751002544056-0.0370638123904-0.04373798222830.1012232438670.003006886896580.13429923062633.0359739398-7.0906045409510.3557356134
147.96773180328-0.127783484967-0.389614471614.242059628090.5603759052275.31432767730.213247719366-0.514097549520.2775205700730.546088497005-0.0257205372097-0.27960638958-0.579865102725-0.159032640243-0.1432824608780.1937285849470.0292911684144-0.01736349121140.185736743512-0.04218932580430.097568944877729.2492111664-2.7201691958213.8719495193
150.552567572585-0.604033066783-0.4142715113480.6741223980640.7389303681186.958221946430.0742721765975-1.42269325390.8402436239131.21849640227-0.0425916196588-1.48634968517-0.9324897352071.007198813630.001927009127350.333784594867-0.101426925702-0.1477027322720.410022936093-0.08196058599820.38036431066319.3860656696.9416146106113.3286042961
163.035974620690.1089271176530.278050494561.45354029797-0.9806985924031.545588297420.19315411059-0.133674814426-0.1312602503940.08579685049960.001686544898430.0704431368413-0.00316231337014-0.0673486593063-0.1430775147410.101044020872-0.0438300461482-0.01483461118560.0951028119294-0.0009945302691250.11041596302622.4636788764-8.799524018958.33834169684
173.94032437815-1.78459294745-0.7796237098611.070828236110.3678657932211.022157360230.0944242412574-0.0391275752794-0.0637135142081-0.0475909170665-0.0264369163462-0.0322237880208-0.0966109077389-0.00353318847319-0.06627350268410.0926791918345-0.02401970797890.002157248653320.0812309807497-0.01295309084820.097446268367920.76281376110.6659429463375.48416825207
186.64774041044-0.812309527663-1.957358853893.826826174780.9183296956344.02086062570.14069941902-0.175445197271-0.6112255741840.0711123755104-0.3204309556180.4027306651810.539356597847-0.4848359728960.3052336630440.134800792371-0.0312959758279-0.006912067145590.243318830163-0.04398842924340.1708693091316.2652931912-8.55933400045-11.9814085021
191.49798183152-0.0425396819791-0.3150990363720.664392499010.2957214402461.748341350040.02719873492350.2358183206820.144512927492-0.1079498682020.0155552350014-0.0170271487906-0.143579443618-0.0135376804196-0.05422998099370.101103607138-0.000321431015420.01168156203570.0801033851457-0.003192529044920.084294944129722.39280594172.96209135912-13.7337402864
Refinement TLS group

Refine-ID: X-RAY DIFFRACTION

IDRefine TLS-IDSelection detailsAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
11chain 'A' and (resid 1 through 42 )AA1 - 421 - 42
22chain 'A' and (resid 43 through 57 )AA43 - 5743 - 57
33chain 'A' and (resid 58 through 71 )AA58 - 7158 - 71
44chain 'B' and (resid 1 through 42 )BB1 - 421 - 42
55chain 'B' and (resid 43 through 57 )BB43 - 5743 - 57
66chain 'B' and (resid 58 through 71 )BB58 - 7158 - 71
77chain 'I' and (resid 1 through 24 )IE1 - 241 - 24
88chain 'I' and (resid 25 through 33 )IE25 - 3325 - 33
99chain 'I' and (resid 34 through 87 )IE34 - 8734 - 91
1010chain 'I' and (resid 88 through 113 )IE88 - 11392 - 131
1111chain 'M' and (resid 0 through 8 )MF0 - 81 - 9
1212chain 'M' and (resid 9 through 1006 )MF9 - 100610 - 115
1313chain 'C' and (resid 1 through 17 )CK1 - 171 - 17
1414chain 'C' and (resid 18 through 25 )CK18 - 2518 - 25
1515chain 'C' and (resid 26 through 33 )CK26 - 3326 - 33
1616chain 'C' and (resid 34 through 87 )CK34 - 8734 - 91
1717chain 'C' and (resid 88 through 113 )CK88 - 11392 - 131
1818chain 'D' and (resid 0 through 8 )DL0 - 81 - 9
1919chain 'D' and (resid 9 through 1006 )DL9 - 100610 - 115

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Yorodumi

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  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

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