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- PDB-6sli: Structure of the RagAB peptide transporter -

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Basic information

Entry
Database: PDB / ID: 6sli
TitleStructure of the RagAB peptide transporter
Components
  • ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
  • ASTTGGNSQRGGG
  • Lipoprotein RagB
  • RagA protein
KeywordsMEMBRANE PROTEIN / outer membrane protein / Bacteroidetes / TonB dependent transporter
Function / homology
Function and homology information


cell outer membrane / membrane
Similarity search - Function
TonB-dependent outer membrane protein, SusC/RagA / TonB-dependent outer membrane protein SusC/RagA, conserved site / CarboxypepD_reg-like domain / SusD-like, N-terminal / Starch-binding associating with outer membrane / RagB/SusD domain / SusD family / Carboxypeptidase-like, regulatory domain superfamily / TonB-dependent receptor-like, beta-barrel / TonB dependent receptor ...TonB-dependent outer membrane protein, SusC/RagA / TonB-dependent outer membrane protein SusC/RagA, conserved site / CarboxypepD_reg-like domain / SusD-like, N-terminal / Starch-binding associating with outer membrane / RagB/SusD domain / SusD family / Carboxypeptidase-like, regulatory domain superfamily / TonB-dependent receptor-like, beta-barrel / TonB dependent receptor / TonB-dependent receptor, plug domain superfamily / TonB-dependent receptor, plug domain / TonB-dependent receptor-like, beta-barrel domain superfamily / TonB-dependent Receptor Plug Domain / Prokaryotic membrane lipoprotein lipid attachment site profile. / Tetratricopeptide-like helical domain superfamily
Similarity search - Domain/homology
Chem-5PL / Lipoprotein RagB / RagA protein
Similarity search - Component
Biological speciesPorphyromonas gingivalis (bacteria)
Porphyromonas gingivalis W83 (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.38 Å
AuthorsMadej, M. / Ranson, N.A. / White, J.B.R.
CitationJournal: Nat Microbiol / Year: 2020
Title: Structural and functional insights into oligopeptide acquisition by the RagAB transporter from Porphyromonas gingivalis.
Authors: Mariusz Madej / Joshua B R White / Zuzanna Nowakowska / Shaun Rawson / Carsten Scavenius / Jan J Enghild / Grzegorz P Bereta / Karunakar Pothula / Ulrich Kleinekathoefer / Arnaud Baslé / ...Authors: Mariusz Madej / Joshua B R White / Zuzanna Nowakowska / Shaun Rawson / Carsten Scavenius / Jan J Enghild / Grzegorz P Bereta / Karunakar Pothula / Ulrich Kleinekathoefer / Arnaud Baslé / Neil A Ranson / Jan Potempa / Bert van den Berg /
Abstract: Porphyromonas gingivalis, an asaccharolytic member of the Bacteroidetes, is a keystone pathogen in human periodontitis that may also contribute to the development of other chronic inflammatory ...Porphyromonas gingivalis, an asaccharolytic member of the Bacteroidetes, is a keystone pathogen in human periodontitis that may also contribute to the development of other chronic inflammatory diseases. P. gingivalis utilizes protease-generated peptides derived from extracellular proteins for growth, but how these peptides enter the cell is not clear. Here, we identify RagAB as the outer-membrane importer for these peptides. X-ray crystal structures show that the transporter forms a dimeric RagAB complex, with the RagB substrate-binding surface-anchored lipoprotein forming a closed lid on the RagA TonB-dependent transporter. Cryo-electron microscopy structures reveal the opening of the RagB lid and thus provide direct evidence for a 'pedal bin' mechanism of nutrient uptake. Together with mutagenesis, peptide-binding studies and RagAB peptidomics, our work identifies RagAB as a dynamic, selective outer-membrane oligopeptide-acquisition machine that is essential for the efficient utilization of proteinaceous nutrients by P. gingivalis.
History
DepositionAug 19, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 20, 2020Provider: repository / Type: Initial release
Revision 1.1Aug 5, 2020Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.2Jan 24, 2024Group: 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 / struct_ncs_dom_lim
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ncs_dom_lim.beg_auth_comp_id / _struct_ncs_dom_lim.beg_label_asym_id / _struct_ncs_dom_lim.beg_label_comp_id / _struct_ncs_dom_lim.beg_label_seq_id / _struct_ncs_dom_lim.end_auth_comp_id / _struct_ncs_dom_lim.end_label_asym_id / _struct_ncs_dom_lim.end_label_comp_id / _struct_ncs_dom_lim.end_label_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Lipoprotein RagB
B: RagA protein
P: ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
C: Lipoprotein RagB
D: RagA protein
E: ASTTGGNSQRGGG
F: Lipoprotein RagB
G: RagA protein
H: ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
I: Lipoprotein RagB
J: RagA protein
K: ASTTGGNSQRGGG
hetero molecules


Theoretical massNumber of molelcules
Total (without water)668,19515
Polymers666,34812
Non-polymers1,8473
Water0
1
A: Lipoprotein RagB
B: RagA protein
P: ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
hetero molecules

A: Lipoprotein RagB
B: RagA protein
P: ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
hetero molecules


Theoretical massNumber of molelcules
Total (without water)336,89712
Polymers333,2046
Non-polymers3,6936
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation3_755-x+2,y,-z+1/21
Buried area26340 Å2
ΔGint-108 kcal/mol
Surface area105790 Å2
MethodPISA
2
C: Lipoprotein RagB
D: RagA protein
E: ASTTGGNSQRGGG

C: Lipoprotein RagB
D: RagA protein
E: ASTTGGNSQRGGG


Theoretical massNumber of molelcules
Total (without water)333,1446
Polymers333,1446
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation3_655-x+1,y,-z+1/21
Buried area24980 Å2
ΔGint-113 kcal/mol
Surface area105980 Å2
MethodPISA
3
F: Lipoprotein RagB
G: RagA protein
H: ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY
I: Lipoprotein RagB
J: RagA protein
K: ASTTGGNSQRGGG


Theoretical massNumber of molelcules
Total (without water)333,1746
Polymers333,1746
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area24870 Å2
ΔGint-111 kcal/mol
Surface area106260 Å2
MethodPISA
Unit cell
Length a, b, c (Å)190.560, 376.870, 369.240
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number20
Space group name H-MC2221
Space group name HallC2c2
Symmetry operation#1: x,y,z
#2: x,-y,-z
#3: -x,y,-z+1/2
#4: -x,-y,z+1/2
#5: x+1/2,y+1/2,z
#6: x+1/2,-y+1/2,-z
#7: -x+1/2,y+1/2,-z+1/2
#8: -x+1/2,-y+1/2,z+1/2
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-ID
11
21
31
41
12
22
32
42
13
23
33
43

NCS domain segments:
Dom-IDComponent-IDEns-IDBeg auth comp-IDBeg label comp-IDEnd auth comp-IDEnd label comp-IDSelection detailsAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
111CYSCYSILEILEchain 'A'AA20 - 5011 - 482
221CYSCYSILEILEchain 'C'CD20 - 5011 - 482
331CYSCYSILEILEchain 'F'FG20 - 5011 - 482
441CYSCYSILEILEchain 'I'IJ20 - 5011 - 482
152LEULEUASPASPchain 'B'BB115 - 83795 - 817
162LYSLYSPHEPHEchain 'B'BB842 - 1017822 - 997
272LEULEUASPASPchain 'D'DE115 - 83795 - 817
282LYSLYSPHEPHEchain 'D'DE842 - 1017822 - 997
392LEULEUASPASPchain 'G'GH115 - 83795 - 817
3102LYSLYSPHEPHEchain 'G'GH842 - 1017822 - 997
4112LEULEUASPASPchain 'J'JK115 - 83795 - 817
4122LYSLYSPHEPHEchain 'J'JK842 - 1017822 - 997
1133ALAALAARGARG(chain 'E' and (resid 1 through 11 or resid 13))EF1 - 101 - 10
2143ALAALAARGARG(chain 'H' and (resid 1 through 11 or resid 13))HI1 - 101 - 10
3153ALAALAARGARG(chain 'K' and (resid 1 through 11 or resid 13))KL1 - 101 - 10
4163ALAALAARGARG(chain 'P' and (resid 1 through 11 or resid 13))PC1 - 101 - 10

NCS ensembles :
ID
1
2
3

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Components

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Protein , 2 types, 8 molecules ACFIBDGJ

#1: Protein
Lipoprotein RagB


Mass: 55259.734 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Porphyromonas gingivalis (strain ATCC BAA-308 / W83) (bacteria)
Strain: ATCC BAA-308 / W83 / Gene: ragB, PG_0186 / Production host: Porphyromonas gingivalis (bacteria) / References: UniProt: F5H948
#2: Protein
RagA protein /


Mass: 110162.195 Da / Num. of mol.: 4 / Source method: isolated from a natural source
Source: (natural) Porphyromonas gingivalis (strain ATCC BAA-308 / W83) (bacteria)
Strain: ATCC BAA-308 / W83 / References: UniProt: Q7MXJ7

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Protein/peptide , 2 types, 4 molecules PHEK

#3: Protein/peptide ALA-SER-THR-THR-GLY-GLY-ASN-SER-GLN-ARG-GLY-SER-GLY


Mass: 1180.167 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Porphyromonas gingivalis W83 (bacteria) / Strain: KRAB
#4: Protein/peptide ASTTGGNSQRGGG


Mass: 1150.141 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Porphyromonas gingivalis W83 (bacteria) / Strain: KRAB

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Non-polymers , 2 types, 3 molecules

#5: Chemical ChemComp-5PL / (1R,4S,6R)-6-({[2-(ACETYLAMINO)-2-DEOXY-ALPHA-D-GLUCOPYRANOSYL]OXY}METHYL)-4-HYDROXY-1-{[(15-METHYLHEXADECANOYL)OXY]METHYL}-4-OXIDO-7-OXO-3,5-DIOXA-8-AZA-4-PHOSPHAHEPTACOS-1-YL 15-METHYLHEXADECANOATE


Mass: 1233.719 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C67H129N2O15P
#6: Chemical ChemComp-C8E / (HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE


Mass: 306.438 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C16H34O5 / Comment: C8E, detergent*YM

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Details

Has ligand of interestN

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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: 5.33 Å3/Da / Density % sol: 76.92 %
Crystal growTemperature: 293 K / Method: vapor diffusion / pH: 7.5 / Details: 18% PEG200 0.1 M KCl 0.1 M K-phosphate

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: Diamond / Beamline: I04-1 / Wavelength: 0.928 Å
DetectorType: DECTRIS PILATUS 6M-F / Detector: PIXEL / Date: May 8, 2017
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.928 Å / Relative weight: 1
ReflectionResolution: 3.38→83.92 Å / Num. obs: 184493 / % possible obs: 99.9 % / Redundancy: 7.6 % / Biso Wilson estimate: 83.77 Å2 / CC1/2: 0.992 / Rpim(I) all: 0.084 / Rrim(I) all: 0.234 / Net I/σ(I): 8.5
Reflection shellResolution: 3.38→3.44 Å / Redundancy: 8.1 % / Num. unique obs: 9162 / CC1/2: 0.735 / Rpim(I) all: 0.449 / Rrim(I) all: 1.276 / % possible all: 100

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Processing

Software
NameVersionClassification
PHENIX1.15.2_3472refinement
PHENIX1.15.2_3472refinement
xia2data reduction
Aimlessdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 5CX8, 5FQ8
Resolution: 3.38→83.92 Å / SU ML: 0.4621 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 27.1351
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflection
Rfree0.2511 9218 5.01 %
Rwork0.2045 174914 -
obs0.2068 184132 99.74 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 101.34 Å2
Refinement stepCycle: LAST / Resolution: 3.38→83.92 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms43884 0 46 0 43930
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.011844919
X-RAY DIFFRACTIONf_angle_d1.454660809
X-RAY DIFFRACTIONf_chiral_restr0.07316447
X-RAY DIFFRACTIONf_plane_restr0.00967978
X-RAY DIFFRACTIONf_dihedral_angle_d5.397926617
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
3.38-3.420.40563060.35025787X-RAY DIFFRACTION99.93
3.42-3.460.37963170.3325850X-RAY DIFFRACTION99.92
3.46-3.50.37553320.32715693X-RAY DIFFRACTION99.9
3.5-3.550.3122940.3085818X-RAY DIFFRACTION99.87
3.55-3.590.32783190.28775786X-RAY DIFFRACTION99.92
3.59-3.640.33982940.27615829X-RAY DIFFRACTION99.97
3.64-3.690.30053110.26385789X-RAY DIFFRACTION99.9
3.69-3.750.28922920.2445772X-RAY DIFFRACTION99.98
3.75-3.810.30943480.25065781X-RAY DIFFRACTION99.85
3.81-3.870.29713040.24565774X-RAY DIFFRACTION99.72
3.87-3.940.2933040.24365810X-RAY DIFFRACTION99.67
3.94-4.010.27983170.23565789X-RAY DIFFRACTION99.75
4.01-4.080.27733140.22995791X-RAY DIFFRACTION99.85
4.08-4.170.24263070.21655801X-RAY DIFFRACTION99.82
4.17-4.260.25183120.20485805X-RAY DIFFRACTION99.87
4.26-4.360.25763140.20065788X-RAY DIFFRACTION99.97
4.36-4.470.26043060.19675859X-RAY DIFFRACTION99.95
4.47-4.590.20083310.18165811X-RAY DIFFRACTION99.92
4.59-4.720.23893120.17595800X-RAY DIFFRACTION99.84
4.72-4.870.21293110.17435827X-RAY DIFFRACTION99.9
4.87-5.050.23172730.16965884X-RAY DIFFRACTION99.98
5.05-5.250.21032770.16815893X-RAY DIFFRACTION99.94
5.25-5.490.21292990.18135834X-RAY DIFFRACTION99.98
5.49-5.780.21623310.16935863X-RAY DIFFRACTION99.92
5.78-6.140.23782840.17415900X-RAY DIFFRACTION99.97
6.14-6.620.2343170.18535870X-RAY DIFFRACTION99.97
6.62-7.280.22513040.17075908X-RAY DIFFRACTION99.98
7.28-8.330.22710.16045950X-RAY DIFFRACTION99.94
8.33-10.50.18283120.14025977X-RAY DIFFRACTION99.89
10.5-83.920.23883050.20395875X-RAY DIFFRACTION95.43
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)
10.672336771692-0.02270216546620.234161193010.990781779040.02645440694290.758059458319-0.0486593949075-0.028371270615-0.0816679675791-0.09506119879910.0969552121550.390076383777-0.0811802461347-0.0774983918483-0.05913414528060.6289785735590.05338587469510.02853890856280.3686530715550.1129284013470.543643499341163.203637676126.02987528486.6625411984
20.534804841155-0.1970742994070.2047609534310.693025736244-0.100848020350.3677799362220.06859664045630.0391670653368-0.499388816969-0.240036246960.1182408763330.3604627952450.125927431112-0.059585456978-0.1271838617240.687312990044-0.0730613401796-0.1426011735540.4871890565330.007233046849321.03157916834167.42137597182.863959350878.595279771
30.8232833273411.374434439130.4894026211452.305661089880.8027233806580.3001962889370.212056518258-0.238449665103-0.2824171038830.325398862153-0.333236907703-0.420233603168-0.1661002506080.4608372505860.3246781090690.914998264918-0.060260974174-0.1602675825680.8688781332650.1195072323640.937386662952162.323209577101.50332139974.851419792
41.3599396978-0.0853285138687-0.1980606960280.7921319785650.02173542553410.586573491409-0.1733179732760.1546220925460.3980858683520.04943322214080.174080087883-0.208410840062-0.02593558429910.10192441516-0.02679704893690.551135251817-0.0488507328197-0.1221929051810.376892191979-0.0544054611430.732046046362121.757647083-10.404586610883.563328167
50.706074499049-0.04935333253770.01622952881970.5432751729930.06559752865770.229366292472-0.2634048218220.4892589759571.20807503774-0.1321851319630.216697285874-0.112435069443-0.1150677978570.1869022034490.001441193808440.826635199912-0.286834087357-0.3653424698570.4980050738490.3746176398492.30997043482116.68237505232.673931587975.9532303612
62.550934008710.581196563189-0.2170422748731.67495814636-1.194718032711.275424879020.0267937359019-0.2338976667970.327590324130.11974935848-0.1529318320790.2334994474630.12347642512-0.1957382963430.1667797246540.913834700162-0.144693751224-0.04072339228010.9285823374270.1928863568551.1650842543121.2847227813.768381258171.5928479892
71.617022966250.551568809096-0.2250623483880.915852986123-0.4769293887221.17491955554-0.138301151485-0.1729424322080.23254893204-0.256016044397-0.129799677387-0.1353042108520.1878125228890.2504233970050.2201652804440.610669324870.1330873360080.1074774842630.5609049404950.2034658184090.44622411932142.720564089138.290899148131.325815662
80.8261812182440.304299488657-0.2797651731840.835115585665-0.4446456259620.9525674281460.0685735183281-1.1418425584-0.1204417989240.0768568827503-0.302529935483-0.265115727456-0.08236841787970.4611044208680.1318912493260.563296773080.0756900740621-0.01832408100181.688856817260.3441186146620.541345189569138.022279846122.875797391172.38502428
90.29411296145-0.1453814417020.8592936574450.0992062467175-0.4468738445682.51315377971-0.0497586936524-0.117298330558-0.360586167413-0.4787748369380.05410050615660.6427511558260.1463662512190.0182156117739-0.1154929044970.770242558977-0.0242603630868-0.1181502310631.15287846216-0.007647294004181.12586737817142.748751819135.683625967158.410370266
101.13009502770.503551987608-0.2824794292530.721290765937-0.562218846450.621854539902-0.339882007570.3555622776270.466479051852-0.6545098312280.5894731343530.6658089844960.283681294576-0.649054699307-0.1546996188771.12707996789-0.222673582273-0.3654209018361.14491403810.4504731225290.87482508740489.0670297191124.932834926123.417993071
110.9232267778920.473641649325-0.1198489070090.709637041661-0.1790198349210.627472241217-0.150296789574-0.476656782069-0.419120638357-0.3656417084330.05640484275980.09867750549840.414555550168-0.2863883026190.0270834059830.841102261519-0.03579285687820.08482072226051.074500832720.3587252208570.72837166135393.889191784496.1788587071156.613680727
12-0.0003979200291940.005035940103180.001210555595660.020063925550.01436535826310.008335489036760.108391222184-0.1597325220670.18303412975-0.230444230099-0.0889818544249-0.16721953336-0.2853043715120.179318653362-0.1386269060371.237599901550.00398872666183-0.1207723449181.186075553030.09371639083280.92280150624589.3122738197102.281357617138.214774315
Refinement TLS group
IDRefine-IDRefine TLS-IDSelection details
1X-RAY DIFFRACTION1(chain 'A' and resid 20 through 501)
2X-RAY DIFFRACTION2(chain 'B' and resid 115 through 1017)
3X-RAY DIFFRACTION3(chain 'P' and resid 1 through 13)
4X-RAY DIFFRACTION4(chain 'C' and resid 20 through 501)
5X-RAY DIFFRACTION5(chain 'D' and resid 115 through 1017)
6X-RAY DIFFRACTION6(chain 'E' and resid 1 through 13)
7X-RAY DIFFRACTION7(chain 'F' and resid 20 through 501)
8X-RAY DIFFRACTION8(chain 'G' and resid 115 through 1017)
9X-RAY DIFFRACTION9(chain 'H' and resid 1 through 13)
10X-RAY DIFFRACTION10(chain 'I' and resid 20 through 501)
11X-RAY DIFFRACTION11(chain 'J' and resid 115 through 1017)
12X-RAY DIFFRACTION12(chain 'K' and resid 1 through 13)

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