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- PDB-7mfi: Bovine sigma-2 receptor bound to cholesterol -

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Basic information

Entry
Database: PDB / ID: 7mfi
TitleBovine sigma-2 receptor bound to cholesterol
ComponentsSigma intracellular receptor 2
KeywordsMEMBRANE PROTEIN / receptor / sterol / dimer
Function / homology
Function and homology information


regulation of intracellular lipid transport / regulation of intracellular cholesterol transport / positive regulation of lipoprotein transport / rough endoplasmic reticulum membrane / oxysterol binding / positive regulation of wound healing / cholesterol binding / rough endoplasmic reticulum / cholesterol homeostasis / nuclear membrane ...regulation of intracellular lipid transport / regulation of intracellular cholesterol transport / positive regulation of lipoprotein transport / rough endoplasmic reticulum membrane / oxysterol binding / positive regulation of wound healing / cholesterol binding / rough endoplasmic reticulum / cholesterol homeostasis / nuclear membrane / lysosome / endoplasmic reticulum / plasma membrane
Similarity search - Function
Sigma intracellular receptor 2 / EXPERA domain / EXPERA (EXPanded EBP superfamily) / EXPERA domain profile.
Similarity search - Domain/homology
CHOLESTEROL / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / Sigma intracellular receptor 2
Similarity search - Component
Biological speciesBos taurus (cattle)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.81 Å
AuthorsAlon, A. / Kruse, A.C.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM119185 United States
CitationJournal: Nature / Year: 2021
Title: Structures of the sigma 2 receptor enable docking for bioactive ligand discovery.
Authors: Alon, A. / Lyu, J. / Braz, J.M. / Tummino, T.A. / Craik, V. / O'Meara, M.J. / Webb, C.M. / Radchenko, D.S. / Moroz, Y.S. / Huang, X.P. / Liu, Y. / Roth, B.L. / Irwin, J.J. / Basbaum, A.I. / ...Authors: Alon, A. / Lyu, J. / Braz, J.M. / Tummino, T.A. / Craik, V. / O'Meara, M.J. / Webb, C.M. / Radchenko, D.S. / Moroz, Y.S. / Huang, X.P. / Liu, Y. / Roth, B.L. / Irwin, J.J. / Basbaum, A.I. / Shoichet, B.K. / Kruse, A.C.
History
DepositionApr 9, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 15, 2021Provider: repository / Type: Initial release
Revision 1.1Dec 22, 2021Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Jan 5, 2022Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Oct 18, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Sigma intracellular receptor 2
B: Sigma intracellular receptor 2
C: Sigma intracellular receptor 2
D: Sigma intracellular receptor 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)89,79229
Polymers80,9204
Non-polymers8,87325
Water36020
1
A: Sigma intracellular receptor 2
B: Sigma intracellular receptor 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,79914
Polymers40,4602
Non-polymers4,33912
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area3080 Å2
ΔGint-18 kcal/mol
Surface area16840 Å2
MethodPISA
2
C: Sigma intracellular receptor 2
D: Sigma intracellular receptor 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,99415
Polymers40,4602
Non-polymers4,53413
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2850 Å2
ΔGint-18 kcal/mol
Surface area15660 Å2
MethodPISA
Unit cell
Length a, b, c (Å)70.873, 54.894, 93.007
Angle α, β, γ (deg.)90.000, 94.302, 90.000
Int Tables number4
Space group name H-MP1211
Space group name HallP2yb
Symmetry operation#1: x,y,z
#2: -x,y+1/2,-z

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Components

#1: Protein
Sigma intracellular receptor 2 / Sigma-2 receptor / Sigma2 receptor / Transmembrane protein 97


Mass: 20229.896 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (cattle) / Gene: TMEM97, S2R / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q3MHW7
#2: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C27H46O / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical
ChemComp-OLC / (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate / 1-Oleoyl-R-glycerol


Mass: 356.540 Da / Num. of mol.: 20 / Source method: obtained synthetically / Formula: C21H40O4
#4: Chemical ChemComp-MES / 2-(N-MORPHOLINO)-ETHANESULFONIC ACID


Mass: 195.237 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H13NO4S / Comment: pH buffer*YM
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 20 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestY

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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: 44.37 %
Crystal growTemperature: 293 K / Method: lipidic cubic phase / pH: 6
Details: PEG 300 400 mM Na Citrate 100 mM MES pH 6 1,2,3 heptanetriol

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Data collection

DiffractionMean temperature: 80 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 23-ID-B / Wavelength: 1.0332 Å
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Aug 17, 2019
RadiationMonochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.0332 Å / Relative weight: 1
ReflectionResolution: 2.8→50 Å / Num. obs: 17737 / % possible obs: 99.7 % / Redundancy: 6.7 % / Biso Wilson estimate: 63.64 Å2 / CC1/2: 0.992 / CC star: 0.998 / Rmerge(I) obs: 0.3223 / Rpim(I) all: 0.1341 / Rrim(I) all: 0.3496 / Net I/σ(I): 5.35
Reflection shellResolution: 2.8→2.9 Å / Redundancy: 6.9 % / Rmerge(I) obs: 2.2 / Mean I/σ(I) obs: 0.94 / Num. unique obs: 1752 / CC1/2: 0.426 / CC star: 0.773 / Rpim(I) all: 0.9 / Rrim(I) all: 2.383 / % possible all: 98.54

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Processing

Software
NameVersionClassification
PHENIX1.19.1_4122+SVNrefinement
Blu-Ice1.19.1_4122data collection
XDSdata reduction
XDSdata scaling
Cootmodel building
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 7M93
Resolution: 2.81→47.24 Å / SU ML: 0.5022 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 31.2462
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflectionSelection details
Rfree0.2781 1752 9.887 %Random selection
Rwork0.24 30724 --
obs-17720 99.58 %-
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 64.35 Å2
Refinement stepCycle: LAST / Resolution: 2.81→47.24 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5292 0 335 21 5648
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.00295814
X-RAY DIFFRACTIONf_angle_d0.58957885
X-RAY DIFFRACTIONf_chiral_restr0.0389867
X-RAY DIFFRACTIONf_plane_restr0.0048939
X-RAY DIFFRACTIONf_dihedral_angle_d11.56642088
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
2.81-2.850.39231350.34681216X-RAY DIFFRACTION95.14
2.85-2.890.39351520.33961312X-RAY DIFFRACTION99.73
2.89-2.930.36961340.34651247X-RAY DIFFRACTION99.5
2.93-2.980.38031280.33071310X-RAY DIFFRACTION99.17
2.98-3.030.40521520.32411254X-RAY DIFFRACTION99.86
3.03-3.090.34371500.3321319X-RAY DIFFRACTION99.8
3.09-3.150.38731320.31971212X-RAY DIFFRACTION100
3.15-3.210.31961350.30411346X-RAY DIFFRACTION100
3.21-3.280.33211330.30361253X-RAY DIFFRACTION99.93
3.28-3.360.36851520.2871286X-RAY DIFFRACTION99.79
3.36-3.440.30851430.28481322X-RAY DIFFRACTION100
3.44-3.530.28871270.2641260X-RAY DIFFRACTION100
3.53-3.640.28871700.25231255X-RAY DIFFRACTION100
3.64-3.760.25971100.22751307X-RAY DIFFRACTION99.86
3.76-3.890.24971350.21761307X-RAY DIFFRACTION100
3.89-4.050.25381520.22221264X-RAY DIFFRACTION99.72
4.05-4.230.21651290.19461313X-RAY DIFFRACTION99.72
4.23-4.450.25791350.19811266X-RAY DIFFRACTION99.86
4.45-4.730.20731470.18751296X-RAY DIFFRACTION99.86
4.73-5.10.25051340.19841275X-RAY DIFFRACTION99.86
5.1-5.610.2761450.22471282X-RAY DIFFRACTION100
5.61-6.420.30151460.25011265X-RAY DIFFRACTION99.86
6.42-8.080.26381410.24491290X-RAY DIFFRACTION99.86
8.08-47.240.22241430.19271267X-RAY DIFFRACTION98.39
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)
14.32747094879-1.77573356291.516810027583.68740215201-5.491948438095.717280449040.14453427059-0.402724559224-0.182482973230.03811971182830.08008148730280.1289585249150.353903166567-0.272563670912-0.3770075030020.416760678175-0.01812109825290.07342987100510.36938928737-0.08073355507280.46009903337123.9533501805-26.331968097713.4112700216
21.58711706848-3.14565341575-1.767164735648.189248954285.162444815229.025333918440.434238859585-1.80241812147-0.554358921269-0.2871259409290.501414893279-0.978919791158-0.253382694840.935920969276-0.9425745606990.616891141374-0.0372690697451-0.1052073415330.974235034136-0.1456967335970.82119649422938.6557515138-31.108658966323.1915361491
33.5475453927-0.597334274992-1.551375608524.597003545061.278422200191.69776070896-0.163872827585-0.792674925975-0.5925251988340.7982481731950.263248726419-0.1258309846210.772007260934-0.2886319841520.0897384287790.5576868936510.0191299289645-0.04096994191520.491461503347-0.06377343299260.47169058236332.4849141675-16.141278699421.9265215048
41.961113993350.435491552433-1.285680317860.816615596047-0.3635081093442.08944948856-0.1326857788390.0294639322956-0.0740899055477-0.335142052660.07945740718030.0009971045025950.187274120791-0.2043199334890.07776782480680.459334858203-0.006764115926410.04235349091170.484686369386-0.06291425082970.43707354352321.9903776345-16.6632126839.20905330629
52.129756885671.866499342244.064299009531.374732241375.295872985892.126362358230.165398060404-0.2002211532551.47916063175-0.0752224189034-0.00896969452-0.717866510671-0.877998084069-0.3973034003230.3021255213770.778534804075-0.143436526488-0.03626602666640.551321947891-0.1558004908410.74140043985148.825803295-15.868363384320.9003232599
66.86075851618-0.2308667932375.353265608481.865412635170.6653395514735.305885947260.384899995126-0.0157106546856-0.231889155607-0.144166953372-0.079616426799-0.05892384896250.39753334288-0.234058832093-0.3037803257810.636990097846-0.04260070669010.08817597469550.4461498414650.02495823772280.38339810851130.6144213154-18.24371312324.36455617628
76.286224423340.7001403608431.279227480042.1499456982-0.3552998507462.161111963490.1728712049-0.762787654960.900308582301-0.127645065635-0.254130749403-0.0727643636176-0.261138238282-0.4369871488420.3005918437540.4525562282-0.008490946929160.02093481467350.517340956044-0.1439962546710.39655623125923.57600286110.893537983310.0980173909
82.13680462661-1.929187176821.281293218015.515850903842.653520504824.338759925840.0532004215587-0.1353405746370.5585351436240.4373867316170.457380486662-0.659666430529-0.8658451309560.55146361207-0.7334635172630.932977923514-0.002078640726380.1690772293370.489781736225-0.03464056193030.61032714769443.324862091312.714972386316.8043810479
96.02360641879-6.48872591691-4.647556971812.101448022741.973350891116.450630944131.165463610470.4794713058861.32172194671-1.110352988040.212649360661-3.6543088357-0.6505698633912.32623779208-1.512526972790.6212440196430.03807507205650.0267810077380.7842249299460.1197198217660.94399902591940.99712781082.4179105771622.2712628925
101.9512024875-0.5980141599270.8726420792213.131014473570.1692201010831.437566728310.345726124180.1057538532420.142882552139-0.523496162022-0.256858852006-0.132803600713-0.0758007637934-0.137153300725-0.08308241188140.4487368176210.01361482698620.06517937745580.507393791995-0.005440472418810.34068651231626.74472520780.5228298808689.5146686522
112.55315015174-3.818295230112.588618291585.616017116-3.947256380852.83587319870.3812417977280.1768067595141.52547618655-0.386230342503-0.667923865347-0.814884572761-0.446779879909-0.180706905542-0.4951164789210.7232197521720.1238544621470.1505379087220.7500579521010.2834054587541.1550593156843.9243929688-3.4982773770231.8640092793
126.582485826674.189065285811.489239208345.427224526611.251744448892.041246308840.890504298649-1.63939266623-1.119795845280.8371367273530.319684954027-1.251490988820.2490527019720.875849890881-0.7802425321230.637499411073-0.0950408649432-0.102219293650.908724133176-0.0837508224260.88808060792939.88229282222.8229754627133.4321826575
138.213597024713.095346313993.714588218014.066894733072.481501605059.897633083370.231762444416-0.6810777434060.2657660448520.093307193071-0.339519597048-0.0233288987324-0.636226155797-0.87190837939-0.01695216389850.4294163299990.01641275292960.05780862678550.348150013478-0.08833733791720.41937483135320.81343167362.8603894258218.5441800034
142.056799454191.644599825490.06945225601896.496858368854.056973407916.262330904160.494457895458-0.341879605548-0.025329851920.6224495024610.0455059551777-0.02752543873190.4561247417670.545657466906-0.6259607815050.4493194769840.0331306454843-0.01725728332980.4692297452870.05053292918310.44186874660610.9917710921-51.446202540741.2110543646
152.575737389724.45869047566-1.000402122313.94865908006-1.062960588110.766498790075-0.601157420022-0.241513382834-0.344398811861-0.4049712310730.425816904013-0.03486271707650.287927660637-0.07272886296010.4030062484680.5243004428910.00974104924220.04430411030120.7062235430210.03663049454510.616772279031-0.717741250574-53.681571927920.9441482557
166.474521473870.5001293583590.908647151281.981621198015.594183062622.71776171471.022581081690.829771148182-0.401884073951-4.00480576909-0.23887217495-1.487100189910.580301955002-0.963936260622-0.02626380606841.307074294970.0925769256886-0.03124773689810.6245986698980.1054399035030.699556260057-6.65094318411-44.284477881523.1447053579
172.23274413646-1.372579360680.6072848992470.3935246150860.04050814855852.780797777030.1134980978080.08776066583930.03419755917030.1387758311210.00767446639466-0.108388376085-0.182966123830.152626046948-0.08927363326160.452352992006-0.07501629277150.04920482949340.496835590498-0.0472576429160.5314871319178.94906119335-40.790557015334.578534421
188.632479236880.3359660726175.592000652592.33553414637-0.00435712780937.587868710590.509243273856-0.0193685243452-0.279580982123-0.0263287251195-0.1488649780930.3590178098570.825257931668-0.677694697633-0.29853265720.463607351435-0.02600321730910.01626575687240.3837284527280.03158256002130.37199925079-5.05857235004-43.483778309336.9729606731
194.242280532.227740454820.1424201646384.72155992906-4.766914359212.04695544605-0.734304899169-2.066682896670.6584694868361.82245678487-1.12186195384-0.8284630080320.458788792617-0.3252255189241.176690231740.928298649173-0.233552863925-0.05347755027261.23841135691-0.3420738143130.83225427804818.2263299179-40.007234103552.854678818
202.08798545925-1.66905327290.265793712533.48466731267-1.636856725691.55491746387-0.855075988003-1.82705146747-0.337792361892-0.2647826192460.68689343935-0.083416564305-0.7353762131330.1930549816060.2592162073490.646512438475-0.000322903265260.09020044281020.54308596353-0.06218503231750.37447935006610.5581863733-13.21384225137.9074693315
215.41176811965-5.56773630848-0.2763114695459.922630073943.17361996633.60425341831.069647080810.6818270549550.562586035736-0.85763293966-0.778531052064-1.42384988835-0.255969560290.699893158871-0.4615067645930.481964638627-0.1227615782210.006216327866570.655138918498-0.1379113316410.836083187541-7.09740542413-17.001287348432.4600135122
225.69509686335-1.66803797129-1.692342482142.025836339671.385450627045.372072344150.6946243861620.627851615131-1.042413445861.30833284315-0.4773311440860.5256993468620.403116940414-0.645673198083-0.3129060562140.4705089812030.0347109239868-0.02512889783580.515729702368-0.07058579733910.714557455342-14.299657623-15.034890427136.3017292443
232.03927175192-2.68495378325-0.756743972057.06520412694.005591878985.178226739020.438075142910.9304120649060.651909039449-0.530377145424-0.415413465270.130130355084-1.07244991065-0.345558795703-0.02147156991370.592119594277-0.00576420108953-0.09019339261420.6236806714810.07529610892810.708569095448-9.45246459715-10.527568172425.2145769141
244.43992156084-6.493942566515.863627115342.13529082491-7.925350538658.588970958011.59957938146-0.484229810205-1.772046263520.9528007394311.936664266343.582495751760.131078206607-1.59509006522-2.316473843740.4592347055890.0787728984803-0.1330501981840.6396234471080.06008728344271.18118710622-7.05860217088-21.050527041822.891741133
253.817305605170.4696056235210.3094709745263.455709639620.721907835684.896065811650.235355350947-0.6611477664540.3588674665770.4264362320560.152621024108-0.0407465881411-0.454326858090.0472055483505-0.482179649760.4461442351980.00961034584610.06669234849540.534543248627-0.03888571439020.3871455231223.41116269103-21.618367305240.4167852052
264.248003516590.04131049808020.04827658312413.031653393661.646699139756.750524046030.5339835645420.2190519959420.4042708698660.6010373731230.1430986599810.0840700908712-0.09725942225610.983106038201-0.6458743347090.445594873532-0.1146232764370.1086363828890.3550737006420.02362302050950.3949656756828.06533257616-27.362764930633.6598451135
272.19135302957-0.69504484836-0.1807379570730.258102346008-0.006541993724190.07062900888540.212394301648-0.471552202506-1.011374589160.17844945384-0.5417999097680.147362310999-0.619593596211-2.01419422183-0.09819668354940.862410134592-0.110124007273-0.405411236881.04294138082-0.05865712105120.761307467-9.42624433296-28.109220662415.1059294903
289.46443423338-2.126499949951.989152900418.23044119877-2.146672186872.044326466170.3170402107152.642574844630.0756114205757-0.8748057799830.6781444249141.380263087440.5651997589590.40903536053-0.7779855986160.8569493826770.00176904652754-0.02620083651340.5639753694580.02935731932920.821700875214-5.43375997734-21.909512139912.403338477
299.59078375812-1.061573156422.741888459243.06605564039-2.543316814375.142243556970.56323283334-0.05531830315110.363377084316-0.364161422708-0.27372286165-0.0892802548735-0.08629427562960.381145749095-0.2613233761110.5474100349340.001071384459380.03277639634020.398747275061-0.06819052029170.3243017015519.38039021244-21.337341974625.7339278179
300.004107565339640.0007933838890310.01312414504730.4642784147270.4003398734260.3060079567341.429064072910.502992840198-0.644391958821.048860915041.14216841228-1.94363762229-0.06050204412761.56683128648-1.70638487091.246303888620.577042561036-0.6357057198560.694365449362-0.5593381089231.6913711837823.7740505197-23.739696976444.0153281332
Refinement TLS group

Refine-ID: X-RAY DIFFRACTION

IDRefine TLS-IDSelection detailsAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
11chain 'A' and (resid 4 through 40 )AA4 - 401 - 37
22chain 'A' and (resid 41 through 54 )AA41 - 5438 - 51
33chain 'A' and (resid 55 through 76 )AA55 - 7652 - 73
44chain 'A' and (resid 77 through 120 )AA77 - 12074 - 117
55chain 'A' and (resid 121 through 136 )AA121 - 136118 - 132
66chain 'A' and (resid 137 through 168 )AA137 - 168133 - 164
77chain 'B' and (resid 4 through 32 )BJ4 - 321 - 29
88chain 'B' and (resid 33 through 54 )BJ33 - 5430 - 51
99chain 'B' and (resid 55 through 63 )BJ55 - 6352 - 60
1010chain 'B' and (resid 64 through 120 )BJ64 - 12061 - 117
1111chain 'B' and (resid 121 through 130 )BJ121 - 130118 - 127
1212chain 'B' and (resid 131 through 136 )BJ131 - 136128 - 133
1313chain 'B' and (resid 137 through 167 )BJ137 - 167134 - 164
1414chain 'C' and (resid 4 through 27 )CO4 - 271 - 24
1515chain 'C' and (resid 28 through 54 )CO28 - 5425 - 51
1616chain 'C' and (resid 55 through 63 )CO55 - 6352 - 60
1717chain 'C' and (resid 64 through 120 )CO64 - 12061 - 117
1818chain 'C' and (resid 121 through 162 )CO121 - 162118 - 153
1919chain 'C' and (resid 163 through 168 )CO163 - 168154 - 159
2020chain 'D' and (resid 5 through 27 )DW5 - 271 - 23
2121chain 'D' and (resid 28 through 32 )DW28 - 3224 - 28
2222chain 'D' and (resid 33 through 40 )DW33 - 4029 - 36
2323chain 'D' and (resid 41 through 53 )DW41 - 5337 - 49
2424chain 'D' and (resid 54 through 63 )DW54 - 6350 - 59
2525chain 'D' and (resid 64 through 93 )DW64 - 9360 - 89
2626chain 'D' and (resid 94 through 120 )DW94 - 12090 - 116
2727chain 'D' and (resid 121 through 130 )DW121 - 130117 - 126
2828chain 'D' and (resid 131 through 136 )DW131 - 136127 - 132
2929chain 'D' and (resid 137 through 162 )DW137 - 162133 - 158
3030chain 'D' and (resid 163 through 167 )DW163 - 167159 - 163

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