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- PDB-7nt5: CryoEM structure of the Nipah virus nucleocapsid single helical t... -

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Basic information

Entry
Database: PDB / ID: 7nt5
TitleCryoEM structure of the Nipah virus nucleocapsid single helical turn assembly
Components
  • Nucleoprotein
  • RNA (78-MER)
KeywordsVIRAL PROTEIN / Protein-RNA complex / Nucleocapsid
Function / homology
Function and homology information


negative stranded viral RNA transcription / negative stranded viral RNA replication / helical viral capsid / viral nucleocapsid / host cell cytoplasm / molecular adaptor activity / ribonucleoprotein complex / structural molecule activity / RNA binding
Similarity search - Function
Paramyxovirus nucleocapsid protein / Paramyxovirus nucleocapsid protein
Similarity search - Domain/homology
RNA / RNA (> 10) / Nucleoprotein
Similarity search - Component
Biological speciesNipah virus
Escherichia coli BL21 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsKer, D.S. / Jenkins, H.T. / Greive, S.J. / Antson, A.A.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Wellcome Trust206377 United Kingdom
CitationJournal: PLoS Pathog / Year: 2021
Title: CryoEM structure of the Nipah virus nucleocapsid assembly.
Authors: De-Sheng Ker / Huw T Jenkins / Sandra J Greive / Alfred A Antson /
Abstract: Nipah and its close relative Hendra are highly pathogenic zoonotic viruses, storing their ssRNA genome in a helical nucleocapsid assembly formed by the N protein, a major viral immunogen. Here, we ...Nipah and its close relative Hendra are highly pathogenic zoonotic viruses, storing their ssRNA genome in a helical nucleocapsid assembly formed by the N protein, a major viral immunogen. Here, we report the first cryoEM structure for a Henipavirus RNA-bound nucleocapsid assembly, at 3.5 Å resolution. The helical assembly is stabilised by previously undefined N- and C-terminal segments, contributing to subunit-subunit interactions. RNA is wrapped around the nucleocapsid protein assembly with a periodicity of six nucleotides per protomer, in the "3-bases-in, 3-bases-out" conformation, with protein plasticity enabling non-sequence specific interactions. The structure reveals commonalities in RNA binding pockets and in the conformation of bound RNA, not only with members of the Paramyxoviridae family, but also with the evolutionarily distant Filoviridae Ebola virus. Significant structural differences with other Paramyxoviridae members are also observed, particularly in the position and length of the exposed α-helix, residues 123-139, which may serve as a valuable epitope for surveillance and diagnostics.
History
DepositionMar 9, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jul 7, 2021Provider: repository / Type: Initial release
Revision 1.1Jul 28, 2021Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Movie
  • Deposited structure unit
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Nucleoprotein
B: Nucleoprotein
C: Nucleoprotein
D: Nucleoprotein
E: Nucleoprotein
F: Nucleoprotein
G: Nucleoprotein
H: Nucleoprotein
I: Nucleoprotein
J: Nucleoprotein
K: Nucleoprotein
L: Nucleoprotein
M: Nucleoprotein
N: RNA (78-MER)


Theoretical massNumber of molelcules
Total (without water)811,75914
Polymers811,75914
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area97180 Å2
ΔGint-660 kcal/mol
Surface area180270 Å2
MethodPISA
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-IDDetails
11A
21B
12A
22C
13A
23D
14A
24E
15A
25F
16A
26G
17A
27H
18A
28I
19A
29J
110A
210K
111A
211L
112A
212M
113B
213C
114B
214D
115B
215E
116B
216F
117B
217G
118B
218H
119B
219I
120B
220J
121B
221K
122B
222L
123B
223M
124C
224D
125C
225E
126C
226F
127C
227G
128C
228H
129C
229I
130C
230J
131C
231K
132C
232L
133C
233M
134D
234E
135D
235F
136D
236G
137D
237H
138D
238I
139D
239J
140D
240K
141D
241L
142D
242M
143E
243F
144E
244G
145E
245H
146E
246I
147E
247J
148E
248K
149E
249L
150E
250M
151F
251G
152F
252H
153F
253I
154F
254J
155F
255K
156F
256L
157F
257M
158G
258H
159G
259I
160G
260J
161G
261K
162G
262L
163G
263M
164H
264I
165H
265J
166H
266K
167H
267L
168H
268M
169I
269J
170I
270K
171I
271L
172I
272M
173J
273K
174J
274L
175J
275M
176K
276L
177K
277M
178L
278M

NCS domain segments:
Dom-IDComponent-IDEns-IDRefine codeAuth asym-IDAuth seq-ID
1010A4 - 396
2010B4 - 396
1020A4 - 397
2020C4 - 397
1030A4 - 396
2030D4 - 396
1040A4 - 396
2040E4 - 396
1050A4 - 396
2050F4 - 396
1060A4 - 396
2060G4 - 396
1070A4 - 396
2070H4 - 396
1080A4 - 396
2080I4 - 396
1090A4 - 396
2090J4 - 396
10100A4 - 396
20100K4 - 396
10110A4 - 397
20110L4 - 397
10120A4 - 397
20120M4 - 397
10130B4 - 396
20130C4 - 396
10140B4 - 398
20140D4 - 398
10150B4 - 398
20150E4 - 398
10160B4 - 398
20160F4 - 398
10170B4 - 398
20170G4 - 398
10180B4 - 398
20180H4 - 398
10190B4 - 398
20190I4 - 398
10200B4 - 398
20200J4 - 398
10210B4 - 398
20210K4 - 398
10220B4 - 398
20220L4 - 398
10230B4 - 398
20230M4 - 398
10240C4 - 396
20240D4 - 396
10250C4 - 396
20250E4 - 396
10260C4 - 396
20260F4 - 396
10270C4 - 396
20270G4 - 396
10280C4 - 396
20280H4 - 396
10290C4 - 396
20290I4 - 396
10300C4 - 396
20300J4 - 396
10310C4 - 396
20310K4 - 396
10320C4 - 397
20320L4 - 397
10330C4 - 397
20330M4 - 397
10340D4 - 398
20340E4 - 398
10350D4 - 398
20350F4 - 398
10360D4 - 398
20360G4 - 398
10370D4 - 398
20370H4 - 398
10380D4 - 398
20380I4 - 398
10390D4 - 398
20390J4 - 398
10400D4 - 398
20400K4 - 398
10410D4 - 398
20410L4 - 398
10420D4 - 398
20420M4 - 398
10430E4 - 398
20430F4 - 398
10440E4 - 398
20440G4 - 398
10450E4 - 398
20450H4 - 398
10460E4 - 398
20460I4 - 398
10470E4 - 398
20470J4 - 398
10480E4 - 398
20480K4 - 398
10490E4 - 398
20490L4 - 398
10500E4 - 398
20500M4 - 398
10510F4 - 398
20510G4 - 398
10520F4 - 398
20520H4 - 398
10530F4 - 398
20530I4 - 398
10540F4 - 398
20540J4 - 398
10550F4 - 398
20550K4 - 398
10560F4 - 398
20560L4 - 398
10570F4 - 398
20570M4 - 398
10580G4 - 398
20580H4 - 398
10590G4 - 398
20590I4 - 398
10600G4 - 398
20600J4 - 398
10610G4 - 398
20610K4 - 398
10620G4 - 398
20620L4 - 398
10630G4 - 398
20630M4 - 398
10640H4 - 398
20640I4 - 398
10650H4 - 398
20650J4 - 398
10660H4 - 398
20660K4 - 398
10670H4 - 398
20670L4 - 398
10680H4 - 398
20680M4 - 398
10690I4 - 398
20690J4 - 398
10700I4 - 398
20700K4 - 398
10710I4 - 398
20710L4 - 398
10720I4 - 398
20720M4 - 398
10730J4 - 398
20730K4 - 398
10740J4 - 398
20740L4 - 398
10750J4 - 398
20750M4 - 398
10760K4 - 398
20760L4 - 398
10770K4 - 398
20770M4 - 398
10780L4 - 398
20780M4 - 398

NCS ensembles :
ID
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78

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Components

#1: Protein
Nucleoprotein / Protein N / Nucleocapsid protein


Mass: 60609.484 Da / Num. of mol.: 13
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Nipah virus / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9IK92
#2: RNA chain RNA (78-MER)


Mass: 23835.986 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli BL21(DE3) (bacteria) / Production host: Escherichia coli BL21(DE3) (bacteria)

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1Nipah virus nucleocapsid Protein-RNA complexCOMPLEXall0RECOMBINANT
2NucleoproteinCOMPLEX#11RECOMBINANT
3RNA (78-MER)COMPLEX#21RECOMBINANT
Molecular weightValue: 1 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Nipah henipavirus121791
33Escherichia coli BL21(DE3) (bacteria)469008
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Escherichia coli BL21(DE3) (bacteria)469008
23Escherichia coli BL21(DE3) (bacteria)469008
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMTrisC4H11NO31
2300 mMsodium chlorideNaCl1
SpecimenConc.: 0.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2100 nm / Nominal defocus min: 500 nm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 41 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1879
Image scansMovie frames/image: 40 / Used frames/image: 1-40

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Processing

SoftwareName: REFMAC / Version: 5.8.0267 / Classification: refinement
EM software
IDNameVersionCategory
1RELION3particle selection
2EPUimage acquisition
4CTFFIND4CTF correction
7UCSF Chimera1.13model fitting
11RELION3.1betaclassification
12RELION3.1beta3D reconstruction
19REFMAC5.8.0267model refinement
20PHENIX1.17model refinement
21ERRASER2model refinement
22ISOLDE0.9model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 217522
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 124891
Details: Local symmetry was applied using the reconstruction
Num. of class averages: 5 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT
Atomic model buildingPDB-ID: 4CO6
Pdb chain-ID: A / Pdb chain residue range: 32-369
RefinementResolution: 3.5→212.74 Å / Cor.coef. Fo:Fc: 0.94 / SU B: 34.89 / SU ML: 0.472 / ESU R: 0.633
Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES
RfactorNum. reflection% reflection
Rwork0.31006 --
obs0.31006 279030 100 %
Solvent computationSolvent model: PARAMETERS FOR MASK CACLULATION
Displacement parametersBiso mean: 175.968 Å2
Baniso -1Baniso -2Baniso -3
1--7.08 Å2-1.11 Å23 Å2
2---6.22 Å2-4.11 Å2
3---13.3 Å2
Refinement stepCycle: 1 / Total: 40200
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON MICROSCOPYr_bond_refined_d0.0120.01241016
ELECTRON MICROSCOPYr_bond_other_d
ELECTRON MICROSCOPYr_angle_refined_deg2.2131.62155861
ELECTRON MICROSCOPYr_angle_other_deg
ELECTRON MICROSCOPYr_dihedral_angle_1_deg7.78655103
ELECTRON MICROSCOPYr_dihedral_angle_2_deg30.49420.7041846
ELECTRON MICROSCOPYr_dihedral_angle_3_deg15.904156669
ELECTRON MICROSCOPYr_dihedral_angle_4_deg24.3115325
ELECTRON MICROSCOPYr_chiral_restr0.1650.25757
ELECTRON MICROSCOPYr_gen_planes_refined0.0140.0229889
ELECTRON MICROSCOPYr_gen_planes_other
ELECTRON MICROSCOPYr_nbd_refined
ELECTRON MICROSCOPYr_nbd_other
ELECTRON MICROSCOPYr_nbtor_refined
ELECTRON MICROSCOPYr_nbtor_other
ELECTRON MICROSCOPYr_xyhbond_nbd_refined
ELECTRON MICROSCOPYr_xyhbond_nbd_other
ELECTRON MICROSCOPYr_metal_ion_refined
ELECTRON MICROSCOPYr_metal_ion_other
ELECTRON MICROSCOPYr_symmetry_vdw_refined
ELECTRON MICROSCOPYr_symmetry_vdw_other
ELECTRON MICROSCOPYr_symmetry_hbond_refined
ELECTRON MICROSCOPYr_symmetry_hbond_other
ELECTRON MICROSCOPYr_symmetry_metal_ion_refined
ELECTRON MICROSCOPYr_symmetry_metal_ion_other
ELECTRON MICROSCOPYr_mcbond_it28.04217.56620457
ELECTRON MICROSCOPYr_mcbond_other
ELECTRON MICROSCOPYr_mcangle_it41.64726.22725545
ELECTRON MICROSCOPYr_mcangle_other
ELECTRON MICROSCOPYr_scbond_it37.59917.91520559
ELECTRON MICROSCOPYr_scbond_other
ELECTRON MICROSCOPYr_scangle_it
ELECTRON MICROSCOPYr_scangle_other
ELECTRON MICROSCOPYr_long_range_B_refined64.403176839
ELECTRON MICROSCOPYr_long_range_B_other
ELECTRON MICROSCOPYr_rigid_bond_restr
ELECTRON MICROSCOPYr_sphericity_free
ELECTRON MICROSCOPYr_sphericity_bonded
Refine LS restraints NCS

Refine-ID: ELECTRON MICROSCOPY / Type: interatomic distance / Weight position: 0.05

Ens-IDDom-IDAuth asym-IDNumberRms dev position (Å)
11A227580.16
12B227580.16
21A224920.16
22C224920.16
31A225880.16
32D225880.16
41A226620.17
42E226620.17
51A225460.16
52F225460.16
61A226340.16
62G226340.16
71A228460.15
72H228460.15
81A224560.17
82I224560.17
91A228320.16
92J228320.16
101A225860.16
102K225860.16
111A226080.16
112L226080.16
121A222960.17
122M222960.17
131B229500.15
132C229500.15
141B230480.15
142D230480.15
151B229040.16
152E229040.16
161B232060.15
162F232060.15
171B232740.14
172G232740.14
181B234200.14
182H234200.14
191B229000.16
192I229000.16
201B232260.15
202J232260.15
211B230100.16
212K230100.16
221B230820.14
222L230820.14
231B225300.16
232M225300.16
241C229180.15
242D229180.15
251C225460.17
252E225460.17
261C228620.15
262F228620.15
271C227340.16
272G227340.16
281C231820.14
282H231820.14
291C225940.16
292I225940.16
301C228640.15
302J228640.15
311C228040.15
312K228040.15
321C227260.16
322L227260.16
331C220960.17
332M220960.17
341D229040.15
342E229040.15
351D230760.14
352F230760.14
361D231340.14
362G231340.14
371D231760.15
372H231760.15
381D228660.16
382I228660.16
391D231120.15
392J231120.15
401D229560.15
402K229560.15
411D228760.15
412L228760.15
421D224500.16
422M224500.16
431E230080.16
432F230080.16
441E230920.15
442G230920.15
451E230460.15
452H230460.15
461E228560.16
462I228560.16
471E228600.16
472J228600.16
481E230300.16
482K230300.16
491E226500.16
492L226500.16
501E221840.17
502M221840.17
511F235120.14
512G235120.14
521F234480.14
522H234480.14
531F229600.16
532I229600.16
541F231860.15
542J231860.15
551F230860.15
552K230860.15
561F231180.15
562L231180.15
571F224340.16
572M224340.16
581G234060.14
582H234060.14
591G230540.15
592I230540.15
601G233640.15
602J233640.15
611G232720.14
612K232720.14
621G231460.15
622L231460.15
631G225600.16
632M225600.16
641H230880.15
642I230880.15
651H233620.14
652J233620.14
661H233920.14
662K233920.14
671H232340.14
672L232340.14
681H226360.16
682M226360.16
691I229420.16
692J229420.16
701I230500.16
702K230500.16
711I227660.16
712L227660.16
721I221380.17
722M221380.17
731J233640.14
732K233640.14
741J231100.15
742L231100.15
751J225220.16
752M225220.16
761K229560.15
762L229560.15
771K224920.16
772M224920.16
781L224420.16
782M224420.16
LS refinement shellResolution: 3.5→3.591 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0 0 -
Rwork0.645 20718 -
obs--100 %

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